[go: up one dir, main page]

US20100316506A1 - Engine fuel pump drive system - Google Patents

Engine fuel pump drive system Download PDF

Info

Publication number
US20100316506A1
US20100316506A1 US12/482,758 US48275809A US2010316506A1 US 20100316506 A1 US20100316506 A1 US 20100316506A1 US 48275809 A US48275809 A US 48275809A US 2010316506 A1 US2010316506 A1 US 2010316506A1
Authority
US
United States
Prior art keywords
rocker arm
pump
fulcrum member
fuel pump
location
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/482,758
Inventor
Matthew Timothy Hamilton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US12/482,758 priority Critical patent/US20100316506A1/en
Application filed by GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAMILTON, MATTHEW TIMOTHY
Assigned to UNITED STATES DEPARTMENT OF THE TREASURY reassignment UNITED STATES DEPARTMENT OF THE TREASURY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to UAW RETIREE MEDICAL BENEFITS TRUST reassignment UAW RETIREE MEDICAL BENEFITS TRUST SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Priority to DE102010022946A priority patent/DE102010022946A1/en
Priority to CN2010102026559A priority patent/CN101922392A/en
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE OF SECURITY INTEREST Assignors: UNITED STATES DEPARTMENT OF THE TREASURY
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE OF SECURITY INTEREST Assignors: UAW RETIREE MEDICAL BENEFITS TRUST
Assigned to WILMINGTON TRUST COMPANY reassignment WILMINGTON TRUST COMPANY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Publication of US20100316506A1 publication Critical patent/US20100316506A1/en
Assigned to GM Global Technology Operations LLC reassignment GM Global Technology Operations LLC CHANGE OF NAME Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

Definitions

  • the present disclosure relates to internal combustion engines, and more specifically to engine fuel pump drive systems.
  • Engine assemblies typically include a fuel pump to provide pressurized fuel for combustion.
  • Some engines include direct injection fuel systems where fuel is injected directly into the cylinders.
  • Direct injection systems typically operate at high pressures. The high pressure requirements may require greater pump output capacity at low engine speed conditions than is needed during engine operation at higher engine speeds, resulting in system inefficiencies.
  • a fuel pump drive mechanism may include a fuel pump rocker arm and a fulcrum member.
  • the fuel pump rocker arm may have a first end defining a cam lobe engagement region and a second end defining a fuel pump lifter engagement region.
  • the fulcrum member may be engaged with the rocker arm and may be displaceable between first and second positions.
  • the fulcrum member may engage the rocker arm at a first location between the first and second ends when in the first position and may engage the rocker arm at a second location between the first location and the second end when in the second position.
  • the rocker arm may provide a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.
  • An engine assembly may include a fuel pump rocker arm, a fulcrum member, a cam lobe and a fuel pump.
  • the fuel pump rocker arm may have first and second ends.
  • the fulcrum member may be engaged with the rocker arm and may be displaceable between first and second positions.
  • the fulcrum member may engage the rocker arm at a first location between the first and second ends when in the first position and may engage the rocker arm at a second location between the first location and the second end when in the second position.
  • the cam lobe may be engaged with the rocker arm at the first end to displace the rocker arm.
  • the fuel pump may include a lifter engaged with the rocker arm at the second end and may be driven by the displacement of the rocker arm.
  • the rocker arm may provide a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.
  • a method of actuating an engine fuel pump may include operating the fuel pump at a first pump output capacity including engaging a fuel pump rocker arm at a first end with a cam lobe and engaging a fuel pump lifter with a second end of the rocker arm.
  • the rocker arm may be supported at a first location between the first and second ends by a fulcrum member and the rocker arm may provide a first pump stroke corresponding to the first pump output capacity.
  • the method may further include operating the fuel pump at a second pump output capacity less than the first pump output capacity including supporting the rocker arm at a second location between the first location and the second end.
  • the cam lobe may engage the rocker arm at the first end and the second end of the rocker arm may engage the fuel pump lifter to provide a second pump stroke less than the first pump stroke when the rocker arm is supported at the second location.
  • FIG. 1 is a schematic illustration of an engine assembly according to the present disclosure
  • FIG. 2 is a first schematic illustration of the fuel pump drive system of the engine assembly of FIG. 1 ;
  • FIG. 3 is a second schematic illustration of the fuel pump drive system of the engine assembly of FIG. 1 ;
  • FIG. 4 is a third schematic illustration of the fuel pump drive system of the engine assembly of FIG. 1 .
  • the engine assembly 10 may define cylinders 14 having pistons 16 disposed therein and may include a camshaft 18 and a fuel system 20 . While the engine assembly 10 is illustrated as an inline overhead cam configuration, it is understood that the present disclosure is not limited inline overhead cam arrangements and applies equally to V-engines and cam-in-block arrangements.
  • the camshaft 18 may include lobes 22 for opening and closing intake and exhaust valves (not shown) and a fuel pump actuation cam lobe 23 .
  • the fuel system 20 may include a fuel pump 24 , a fuel tank 26 , fuel injectors 28 and a fuel pump drive mechanism 30 .
  • the fuel pump 24 may be in fluid communication with the fuel tank 26 and the fuel injectors 28 and may provide a pressurized fuel flow to the cylinders 14 via the fuel injectors 28 .
  • the fuel system 20 may form a direct injection fuel system where the fuel injectors 28 are in direct fluid communication with the cylinders 14 .
  • the fuel pump 24 may form a high pressure fuel pump and may include a reciprocating pump lifter 32 engaged with the fuel pump drive mechanism 30 to pump the fuel.
  • the lifter 32 may include a reciprocating member 34 having a roller element 36 at an end thereof and a biasing member 38 urging the roller element 36 into engagement with the fuel pump drive mechanism 30 .
  • the fuel pump 24 may be a reciprocating piston-type fuel pump.
  • the fuel pump drive mechanism 30 may be supported on an engine structure 12 and may include a fuel pump rocker arm 40 , a fulcrum member 42 and an actuation mechanism 44 .
  • the rocker arm 40 may include first and second sides 46 , 48 opposite one another.
  • a cam engagement region 50 may be defined at a first end of the rocker arm 40 on the first side 46 and a fuel pump lifter engagement region 52 may be defined at a second end of the rocker arm 40 on the first side 46 .
  • the fulcrum member 42 may be engaged with the second side 48 of the rocker arm 40 at a location between the first and second ends.
  • the fulcrum member 42 may be coupled to the actuation mechanism 44 and may include first and second pivot regions 54 , 56 .
  • the actuation mechanism 44 may be a mechanically actuated mechanism or an electrically actuated mechanism.
  • exemplary mechanically actuated mechanisms may include hydraulically actuated mechanisms actuated in a manner similar to hydraulically actuated camshaft phasers.
  • the electrically actuated mechanisms may include solenoid actuated mechanisms.
  • the actuation mechanism 44 may displace the fulcrum member 42 between first and second positions to modify the pivot location for the rocker arm 40 .
  • the fulcrum member 42 may engage the rocker arm 40 at a first location (L 1 ) between the first and second ends when in the first position ( FIGS. 2 and 3 ) and may engage the rocker arm 40 at a second location (L 2 ) between the first location (L 1 ) and the second end when in the second position ( FIG. 4 ).
  • the fulcrum member 42 may be rotated between the first and second positions by the actuation mechanism 44 .
  • the first pivot region 54 may abut the rocker arm 40 at the first location (L 1 ) and the second pivot region 56 may be free from engagement with the rocker arm 40 when the fulcrum member 42 is in the first position.
  • the second pivot region 56 may abut the rocker arm 40 at the second location (L 2 ) and the first pivot region 54 may be free from engagement with the rocker arm 40 when the fulcrum member 42 is in the second position.
  • a pivot for the rocker arm 40 may be adjusted in a variety of other ways, including, but not limited to displacement of a fulcrum member along a longitudinal extent of the rocker arm 40 . Further, the present disclosure is not limited to two pivot locations. By way of non-limiting example, any discrete number or even a continuously variable number of pivot locations may be employed.
  • the first location (L 1 ) may provide a pivot location for the rocker arm 40 that is closer to the cam engagement region 50 than a pivot location defined by the second location (L 2 ). Therefore, the output (or capacity) of the fuel pump 24 may be increased or decreased by displacement of the fulcrum member 42 between the first and second positions. More specifically, the pump stroke of the lifter 32 may be adjusted by displacement of the fulcrum member 42 .
  • FIG. 3 illustrates a first pump stroke (S 1 ) defined when a peak 60 of the cam lobe 23 is engaged with the cam engagement region 50 and the fulcrum member 42 is in the first position.
  • FIG. 4 illustrates a second pump stroke (S 2 ) defined when a peak 60 of the cam lobe 23 is engaged with the cam engagement region 50 and the fulcrum member 42 is in the second position.
  • the output (or capacity) of the fuel pump 24 may be greater when the fulcrum member 42 is in the first position for a given engine speed.
  • the fuel pump drive mechanism 30 may be utilized to provide desired fuel requirements without increasing pump size.
  • the fulcrum member 42 may be in the first position during engine start conditions, including engine operating speeds of less than one thousand revolutions per minute (RPM). Conversely, the fulcrum member 42 may be in the second position during normal engine operation, including engine operating speeds of greater than one thousand revolutions per minute (RPM). The fulcrum member 42 may be displaced based on engine fuel demand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A fuel pump drive mechanism may include a fuel pump rocker arm and a fulcrum member. The fuel pump rocker arm may have a first end defining a cam engagement region and a second end defining a fuel pump engagement region. The fulcrum member may be engaged with the rocker arm and may be displaceable between first and second positions. The fulcrum member may engage the rocker arm at a first location between the first and second ends when in the first position and may engage the rocker arm at a second location between the first location and the second end when in the second position. The rocker arm may provide a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.

Description

    FIELD
  • The present disclosure relates to internal combustion engines, and more specifically to engine fuel pump drive systems.
    • BACKGROUND
  • This section provides background information related to the present disclosure which is not necessarily prior art.
  • Engine assemblies typically include a fuel pump to provide pressurized fuel for combustion. Some engines include direct injection fuel systems where fuel is injected directly into the cylinders. Direct injection systems typically operate at high pressures. The high pressure requirements may require greater pump output capacity at low engine speed conditions than is needed during engine operation at higher engine speeds, resulting in system inefficiencies.
    • SUMMARY
  • A fuel pump drive mechanism may include a fuel pump rocker arm and a fulcrum member. The fuel pump rocker arm may have a first end defining a cam lobe engagement region and a second end defining a fuel pump lifter engagement region. The fulcrum member may be engaged with the rocker arm and may be displaceable between first and second positions. The fulcrum member may engage the rocker arm at a first location between the first and second ends when in the first position and may engage the rocker arm at a second location between the first location and the second end when in the second position. The rocker arm may provide a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.
  • An engine assembly may include a fuel pump rocker arm, a fulcrum member, a cam lobe and a fuel pump. The fuel pump rocker arm may have first and second ends. The fulcrum member may be engaged with the rocker arm and may be displaceable between first and second positions. The fulcrum member may engage the rocker arm at a first location between the first and second ends when in the first position and may engage the rocker arm at a second location between the first location and the second end when in the second position. The cam lobe may be engaged with the rocker arm at the first end to displace the rocker arm. The fuel pump may include a lifter engaged with the rocker arm at the second end and may be driven by the displacement of the rocker arm. The rocker arm may provide a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.
  • A method of actuating an engine fuel pump may include operating the fuel pump at a first pump output capacity including engaging a fuel pump rocker arm at a first end with a cam lobe and engaging a fuel pump lifter with a second end of the rocker arm. The rocker arm may be supported at a first location between the first and second ends by a fulcrum member and the rocker arm may provide a first pump stroke corresponding to the first pump output capacity. The method may further include operating the fuel pump at a second pump output capacity less than the first pump output capacity including supporting the rocker arm at a second location between the first location and the second end. The cam lobe may engage the rocker arm at the first end and the second end of the rocker arm may engage the fuel pump lifter to provide a second pump stroke less than the first pump stroke when the rocker arm is supported at the second location.
  • Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
    • DRAWINGS
  • The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way.
  • FIG. 1 is a schematic illustration of an engine assembly according to the present disclosure;
  • FIG. 2 is a first schematic illustration of the fuel pump drive system of the engine assembly of FIG. 1;
  • FIG. 3 is a second schematic illustration of the fuel pump drive system of the engine assembly of FIG. 1; and
  • FIG. 4 is a third schematic illustration of the fuel pump drive system of the engine assembly of FIG. 1.
    •
  • Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
    • DETAILED DESCRIPTION
  • Examples of the present disclosure will now be described more fully with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.
  • Referring now to FIG. 1, an engine assembly 10 is schematically illustrated. The engine assembly 10 may define cylinders 14 having pistons 16 disposed therein and may include a camshaft 18 and a fuel system 20. While the engine assembly 10 is illustrated as an inline overhead cam configuration, it is understood that the present disclosure is not limited inline overhead cam arrangements and applies equally to V-engines and cam-in-block arrangements. The camshaft 18 may include lobes 22 for opening and closing intake and exhaust valves (not shown) and a fuel pump actuation cam lobe 23.
  • The fuel system 20 may include a fuel pump 24, a fuel tank 26, fuel injectors 28 and a fuel pump drive mechanism 30. The fuel pump 24 may be in fluid communication with the fuel tank 26 and the fuel injectors 28 and may provide a pressurized fuel flow to the cylinders 14 via the fuel injectors 28. In the present non-limiting example, the fuel system 20 may form a direct injection fuel system where the fuel injectors 28 are in direct fluid communication with the cylinders 14.
  • With additional reference to FIGS. 2-4, the fuel pump 24 may form a high pressure fuel pump and may include a reciprocating pump lifter 32 engaged with the fuel pump drive mechanism 30 to pump the fuel. The lifter 32 may include a reciprocating member 34 having a roller element 36 at an end thereof and a biasing member 38 urging the roller element 36 into engagement with the fuel pump drive mechanism 30. By way of non-limiting example, the fuel pump 24 may be a reciprocating piston-type fuel pump.
  • The fuel pump drive mechanism 30 may be supported on an engine structure 12 and may include a fuel pump rocker arm 40, a fulcrum member 42 and an actuation mechanism 44. The rocker arm 40 may include first and second sides 46, 48 opposite one another. A cam engagement region 50 may be defined at a first end of the rocker arm 40 on the first side 46 and a fuel pump lifter engagement region 52 may be defined at a second end of the rocker arm 40 on the first side 46. The fulcrum member 42 may be engaged with the second side 48 of the rocker arm 40 at a location between the first and second ends.
  • The fulcrum member 42 may be coupled to the actuation mechanism 44 and may include first and second pivot regions 54, 56. The actuation mechanism 44 may be a mechanically actuated mechanism or an electrically actuated mechanism. By way of non-limiting example, exemplary mechanically actuated mechanisms may include hydraulically actuated mechanisms actuated in a manner similar to hydraulically actuated camshaft phasers. The electrically actuated mechanisms may include solenoid actuated mechanisms.
  • The actuation mechanism 44 may displace the fulcrum member 42 between first and second positions to modify the pivot location for the rocker arm 40. The fulcrum member 42 may engage the rocker arm 40 at a first location (L1) between the first and second ends when in the first position (FIGS. 2 and 3) and may engage the rocker arm 40 at a second location (L2) between the first location (L1) and the second end when in the second position (FIG. 4).
  • By way of non-limiting example, the fulcrum member 42 may be rotated between the first and second positions by the actuation mechanism 44. The first pivot region 54 may abut the rocker arm 40 at the first location (L1) and the second pivot region 56 may be free from engagement with the rocker arm 40 when the fulcrum member 42 is in the first position. The second pivot region 56 may abut the rocker arm 40 at the second location (L2) and the first pivot region 54 may be free from engagement with the rocker arm 40 when the fulcrum member 42 is in the second position. While illustrated as being rotated between the first and second positions, it is understood that a pivot for the rocker arm 40 may be adjusted in a variety of other ways, including, but not limited to displacement of a fulcrum member along a longitudinal extent of the rocker arm 40. Further, the present disclosure is not limited to two pivot locations. By way of non-limiting example, any discrete number or even a continuously variable number of pivot locations may be employed.
  • The first location (L1) may provide a pivot location for the rocker arm 40 that is closer to the cam engagement region 50 than a pivot location defined by the second location (L2). Therefore, the output (or capacity) of the fuel pump 24 may be increased or decreased by displacement of the fulcrum member 42 between the first and second positions. More specifically, the pump stroke of the lifter 32 may be adjusted by displacement of the fulcrum member 42.
  • As seen in FIG. 2, a fully extended position of the lifter 32 is defined when a base 58 of the cam lobe 23 is engaged with the cam engagement region 50. FIG. 3 illustrates a first pump stroke (S1) defined when a peak 60 of the cam lobe 23 is engaged with the cam engagement region 50 and the fulcrum member 42 is in the first position. FIG. 4 illustrates a second pump stroke (S2) defined when a peak 60 of the cam lobe 23 is engaged with the cam engagement region 50 and the fulcrum member 42 is in the second position. Since the pivot location defined by the first location (L1) is closer to the cam lobe 23 than the pivot location defined by the second location (L2), the first pump stroke (S1) is greater than the second pump stroke (S2). Therefore, the output (or capacity) of the fuel pump 24 may be greater when the fulcrum member 42 is in the first position for a given engine speed.
  • The fuel pump drive mechanism 30 may be utilized to provide desired fuel requirements without increasing pump size. By way of non-limiting example, the fulcrum member 42 may be in the first position during engine start conditions, including engine operating speeds of less than one thousand revolutions per minute (RPM). Conversely, the fulcrum member 42 may be in the second position during normal engine operation, including engine operating speeds of greater than one thousand revolutions per minute (RPM). The fulcrum member 42 may be displaced based on engine fuel demand.

Claims (20)

1. A fuel pump drive mechanism comprising:
a fuel pump rocker arm having a first end defining a cam lobe engagement region and a second end defining a fuel pump lifter engagement region; and
a fulcrum member engaged with the rocker arm and displaceable between first and second positions, the fulcrum member engaging the rocker arm at a first location between the first and second ends when in the first position and engaging the rocker arm at a second location between the first location and the second end when in the second position, the rocker arm providing a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.
2. The fuel pump drive mechanism of claim 1, wherein the fulcrum member includes first and second pivot regions, the fulcrum member being rotatable from the first position where the first pivot region abuts the rocker arm at the first location to the second position where the second pivot region abuts the rocker arm at the second location.
3. The fuel pump drive mechanism of claim 1, further comprising an actuation mechanism engaged with the fulcrum member and displacing the fulcrum member between the first and second positions.
4. The fuel pump drive mechanism of claim 3, wherein the actuation mechanism includes an electrical solenoid actuated mechanism.
5. The fuel pump drive mechanism of claim 3, wherein the actuation mechanism includes a mechanically actuated mechanism.
6. The fuel pump drive mechanism of claim 1, wherein the rocker arm includes a first side engaged with the cam lobe and the pump lifter and a second side opposite the first side engaged with the fulcrum member.
7. The fuel pump drive mechanism of claim 1, wherein the first pump stroke corresponds to a first pump output capacity and the second pump stroke corresponds to a second pump output capacity less than the first pump output capacity.
8. An engine assembly comprising:
a fuel pump rocker arm having first and second ends;
a fulcrum member engaged with the rocker arm and displaceable between first and second positions, the fulcrum member engaging the rocker arm at a first location between the first and second ends when in the first position and engaging the rocker arm at a second location between the first location and the second end when in the second position;
a cam lobe engaged with the rocker arm at the first end to displace the rocker arm; and
a fuel pump including a lifter engaged with the rocker arm at the second end and being driven by the displacement of the rocker arm, the rocker arm providing a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.
9. The engine assembly of claim 8, wherein the fulcrum member includes first and second pivot regions, the fulcrum member being rotatable from the first position where the first pivot region abuts the rocker arm at the first location to the second position where the second pivot region abuts the rocker arm at the second location.
10. The engine assembly of claim 8, further comprising an actuation mechanism engaged with the fulcrum member and displacing the fulcrum member between the first and second positions.
11. The engine assembly of claim 10, wherein the actuation mechanism includes an electrical solenoid actuated mechanism.
12. The engine assembly of claim 10, wherein the actuation mechanism includes a mechanically actuated mechanism.
13. The engine assembly of claim 8, wherein the rocker arm includes a first side engaged with the cam lobe and the pump lifter and a second side opposite the first side engaged with the fulcrum member.
14. The engine assembly of claim 8, wherein the first pump stroke corresponds to a first pump output capacity and the second pump stroke corresponds to a second pump output capacity less than the first pump output capacity.
15. The engine assembly of claim 8, wherein the fulcrum member engages the rocker arm at the first location during engine operation at a first engine speed and the fulcrum member engages the rocker arm at the second location during engine operation at a second engine speed greater than the first engine speed.
16. A method comprising:
operating an engine fuel pump at a first pump output capacity including engaging a fuel pump rocker arm at a first end with a cam lobe and engaging a fuel pump lifter with a second end of the rocker arm, the rocker arm being supported at a first location between the first and second ends by a fulcrum member and the rocker arm providing a first pump stroke corresponding to the first pump output capacity; and
operating the engine fuel pump at a second pump output capacity less than the first pump output capacity including supporting the rocker arm at a second location between the first location and the second end and engaging the rocker arm at the first end with the cam lobe and engaging the fuel pump lifter with the second end of the rocker arm to provide a second pump stroke less than the first pump stroke.
17. The method of claim 16, further comprising switching between the first and second pump output capacities by rotating the fulcrum member from a first position where a first pivot region of the fulcrum member abuts the fuel pump rocker arm at the first location to a second position where a second pivot region of the fulcrum member abuts the fuel pump rocker arm at the second location.
18. The method of claim 16, wherein the fuel pump is operated at the first pump output capacity during engine start-up.
19. The method of claim 16, wherein the fuel pump is operated at the first pump output capacity at engine speeds below 1000 revolutions per minute.
20. The method of claim 16, wherein the fuel pump is operated at the second pump output capacity at engine speeds above 1000 revolutions per minute.
US12/482,758 2009-06-11 2009-06-11 Engine fuel pump drive system Abandoned US20100316506A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/482,758 US20100316506A1 (en) 2009-06-11 2009-06-11 Engine fuel pump drive system
DE102010022946A DE102010022946A1 (en) 2009-06-11 2010-06-08 Engine fuel pump drive system
CN2010102026559A CN101922392A (en) 2009-06-11 2010-06-11 Engine fuel pump drive system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/482,758 US20100316506A1 (en) 2009-06-11 2009-06-11 Engine fuel pump drive system

Publications (1)

Publication Number Publication Date
US20100316506A1 true US20100316506A1 (en) 2010-12-16

Family

ID=43306600

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/482,758 Abandoned US20100316506A1 (en) 2009-06-11 2009-06-11 Engine fuel pump drive system

Country Status (3)

Country Link
US (1) US20100316506A1 (en)
CN (1) CN101922392A (en)
DE (1) DE102010022946A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120177505A1 (en) * 2011-01-06 2012-07-12 Continental Automotive Systems Us, Inc. Variable stroke control structure for high pressure fuel pump
EP2703636A1 (en) * 2012-09-04 2014-03-05 Delphi Technologies Holding S.à.r.l. Fuel Pump Arrangements
US9464590B2 (en) 2014-04-16 2016-10-11 Fca Us Llc Variable stroke direct injection fuel pump system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012090318A1 (en) * 2010-12-28 2012-07-05 トヨタ自動車株式会社 High-pressure pump
JP5910149B2 (en) * 2012-02-17 2016-04-27 スズキ株式会社 Fuel pump device for vehicle engine
CN112955655A (en) * 2019-05-17 2021-06-11 伊鲁米纳公司 Linear peristaltic pump for use with a fluid cartridge

Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991586A (en) * 1933-12-21 1935-02-19 Continental Motors Corp Engine
US2090428A (en) * 1936-10-03 1937-08-17 Arthur E Schneider Stroke adjusting means for fuel injection devices and the like
US2450898A (en) * 1944-10-05 1948-10-12 Lima Hamilton Corp Fuel injector control mechanism for free piston engines
US2584408A (en) * 1948-06-05 1952-02-05 Julius E Witzky Injection pump for internalcombustion engines
US2688516A (en) * 1951-09-08 1954-09-07 Allan G Bell Fuel injector
US2778244A (en) * 1955-04-21 1957-01-22 Leo W Cornwall Hydraulic power transmissions
US3898887A (en) * 1972-09-13 1975-08-12 Graham Cameron Grant Stroke varying mechanism
US4062335A (en) * 1974-06-03 1977-12-13 Rank William J Variable volume pump for internal combustion engine
US4077369A (en) * 1976-04-21 1978-03-07 Joseph F. Buehner, Trustee Internal combustion engine valve stroke adjusting device and combination thereof with engine
US4224916A (en) * 1978-11-13 1980-09-30 Stanadyne, Inc. Timing control for fuel injection pump
US4298549A (en) * 1979-10-29 1981-11-03 Woodworth Carburetor Corp. Of Nevada Carburetor
US4320733A (en) * 1979-08-04 1982-03-23 Lucas Industries Limited Fuel pumping apparatus
US4359995A (en) * 1980-01-29 1982-11-23 Lucas Industries Limited Fuel injection pumping apparatus
US4438736A (en) * 1981-03-10 1984-03-27 Nissan Motor Co., Ltd. Variable valve timing arrangement with automatic valve clearance adjustment
US4470398A (en) * 1982-03-23 1984-09-11 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US4721007A (en) * 1983-11-30 1988-01-26 Entzminger William Variable ratio lever arm mechanism
US5540207A (en) * 1993-04-10 1996-07-30 Hatz Motoren Camshaft drive
US5823154A (en) * 1995-12-30 1998-10-20 Robert Bosch Gmbh Internal combustion engine with a cam drive
US5836747A (en) * 1995-06-13 1998-11-17 Gondek; John T. Variable volume air pump
US6196199B1 (en) * 1999-12-28 2001-03-06 Detroit Diesel Corporation Fuel injector assembly having an improved solenoid operated check valve
US6247450B1 (en) * 1999-12-27 2001-06-19 Detroit Diesel Corporation Electronic controlled diesel fuel injection system
US6405707B1 (en) * 2000-12-18 2002-06-18 Caterpillar Inc. Integral engine and engine compression braking HEUI injector
US20020123401A1 (en) * 2001-03-02 2002-09-05 Henry Rassem Ragheb Combination starter-generator
US6591797B2 (en) * 2001-03-23 2003-07-15 William W. Entzminger Variable fulcrum rocker arm
US6772742B2 (en) * 2002-03-01 2004-08-10 International Engine Intellectual Property Company, Llc Method and apparatus for flexibly regulating internal combustion engine valve flow
US20070073470A1 (en) * 2005-09-26 2007-03-29 Hitachi Ltd. Apparatus for and method of controlling a vehicle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6796294B2 (en) * 2003-01-17 2004-09-28 Honda Motor Co., Ltd. Internal combustion engine

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991586A (en) * 1933-12-21 1935-02-19 Continental Motors Corp Engine
US2090428A (en) * 1936-10-03 1937-08-17 Arthur E Schneider Stroke adjusting means for fuel injection devices and the like
US2450898A (en) * 1944-10-05 1948-10-12 Lima Hamilton Corp Fuel injector control mechanism for free piston engines
US2584408A (en) * 1948-06-05 1952-02-05 Julius E Witzky Injection pump for internalcombustion engines
US2688516A (en) * 1951-09-08 1954-09-07 Allan G Bell Fuel injector
US2778244A (en) * 1955-04-21 1957-01-22 Leo W Cornwall Hydraulic power transmissions
US3898887A (en) * 1972-09-13 1975-08-12 Graham Cameron Grant Stroke varying mechanism
US4062335A (en) * 1974-06-03 1977-12-13 Rank William J Variable volume pump for internal combustion engine
US4077369A (en) * 1976-04-21 1978-03-07 Joseph F. Buehner, Trustee Internal combustion engine valve stroke adjusting device and combination thereof with engine
US4224916A (en) * 1978-11-13 1980-09-30 Stanadyne, Inc. Timing control for fuel injection pump
US4320733A (en) * 1979-08-04 1982-03-23 Lucas Industries Limited Fuel pumping apparatus
US4298549A (en) * 1979-10-29 1981-11-03 Woodworth Carburetor Corp. Of Nevada Carburetor
US4359995A (en) * 1980-01-29 1982-11-23 Lucas Industries Limited Fuel injection pumping apparatus
US4438736A (en) * 1981-03-10 1984-03-27 Nissan Motor Co., Ltd. Variable valve timing arrangement with automatic valve clearance adjustment
US4470398A (en) * 1982-03-23 1984-09-11 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US4721007A (en) * 1983-11-30 1988-01-26 Entzminger William Variable ratio lever arm mechanism
US5540207A (en) * 1993-04-10 1996-07-30 Hatz Motoren Camshaft drive
US5836747A (en) * 1995-06-13 1998-11-17 Gondek; John T. Variable volume air pump
US5823154A (en) * 1995-12-30 1998-10-20 Robert Bosch Gmbh Internal combustion engine with a cam drive
US6247450B1 (en) * 1999-12-27 2001-06-19 Detroit Diesel Corporation Electronic controlled diesel fuel injection system
US6196199B1 (en) * 1999-12-28 2001-03-06 Detroit Diesel Corporation Fuel injector assembly having an improved solenoid operated check valve
US6405707B1 (en) * 2000-12-18 2002-06-18 Caterpillar Inc. Integral engine and engine compression braking HEUI injector
US20020123401A1 (en) * 2001-03-02 2002-09-05 Henry Rassem Ragheb Combination starter-generator
US6591797B2 (en) * 2001-03-23 2003-07-15 William W. Entzminger Variable fulcrum rocker arm
US6772742B2 (en) * 2002-03-01 2004-08-10 International Engine Intellectual Property Company, Llc Method and apparatus for flexibly regulating internal combustion engine valve flow
US20070073470A1 (en) * 2005-09-26 2007-03-29 Hitachi Ltd. Apparatus for and method of controlling a vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120177505A1 (en) * 2011-01-06 2012-07-12 Continental Automotive Systems Us, Inc. Variable stroke control structure for high pressure fuel pump
WO2012094389A3 (en) * 2011-01-06 2012-10-26 Continental Automotive Systems, Inc. Variable stroke control structure for high pressure fuel pump
US9435328B2 (en) * 2011-01-06 2016-09-06 Continental Automotive Systems Inc. Variable stroke control structure for high pressure fuel pump
EP2703636A1 (en) * 2012-09-04 2014-03-05 Delphi Technologies Holding S.à.r.l. Fuel Pump Arrangements
WO2014037155A1 (en) * 2012-09-04 2014-03-13 Delphi Technologies Holding S.À.R.L. Fuel pump arrangements
US20150226169A1 (en) * 2012-09-04 2015-08-13 Delphi Intenational Operations Luxembourg, S.A.R.L Fuel pump arrangements
US9464590B2 (en) 2014-04-16 2016-10-11 Fca Us Llc Variable stroke direct injection fuel pump system

Also Published As

Publication number Publication date
CN101922392A (en) 2010-12-22
DE102010022946A1 (en) 2011-02-17

Similar Documents

Publication Publication Date Title
US8789502B2 (en) Variable valve actuation system and method using variable oscillating cam
RU2673045C2 (en) Poppet valve operator (variants) and method for cylinder deactivation
US8375904B2 (en) Early intake valve closing and variable valve timing assembly and method
US8235015B2 (en) Internal combustion engine with variable valve gear
US9163531B2 (en) Self-adaptive hydraulic variable valve timing system for diesel engine and control method
US20100316506A1 (en) Engine fuel pump drive system
RU2509219C2 (en) Piston engine control device
US8327619B2 (en) Method for operating an internal combustion engine
US20180106199A1 (en) Compression ratio adjustment apparatus for internal combustion engine
JP6094545B2 (en) Engine oil supply device
US7451741B1 (en) High-pressure pump
WO2012112817A1 (en) Variable valve actuation system and method using variable oscillating cam
EP2710243B1 (en) Multi-cylinder piston engine
US8627803B2 (en) Variable displacement engine assembly including partial boost arrangement
JP2009281335A (en) Valve gear for internal combustion engine
JP4580937B2 (en) System and method for preventing collision between piston and valve of non-freewheel internal combustion engine
CA2451944A1 (en) Internal combustion engine
CN103415689B (en) Method for controlling an internal combustion engine
CN120283102A (en) Exhaust valve deactivation to operate a split exhaust plenum
JP2002227667A (en) Variable valve train for internal combustion engines
CN114718692A (en) Hydro-mechanical module for engine valve actuation system
JP2006118380A (en) Liquid pump
EP2941548B1 (en) Valve lifting arrangement and method for operating exhaust valve
JPS6128027Y2 (en)
Ha Development of Nu 2.0 L CVVL engine

Legal Events

Date Code Title Description
AS Assignment

Owner name: GM GLOBAL TECHNOLOGY OPERATIONS, INC., MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAMILTON, MATTHEW TIMOTHY;REEL/FRAME:022812/0694

Effective date: 20090604

AS Assignment

Owner name: UNITED STATES DEPARTMENT OF THE TREASURY, DISTRICT

Free format text: SECURITY AGREEMENT;ASSIGNOR:GM GLOBAL TECHNOLOGY OPERATIONS, INC.;REEL/FRAME:023201/0118

Effective date: 20090710

AS Assignment

Owner name: UAW RETIREE MEDICAL BENEFITS TRUST, MICHIGAN

Free format text: SECURITY AGREEMENT;ASSIGNOR:GM GLOBAL TECHNOLOGY OPERATIONS, INC.;REEL/FRAME:023162/0048

Effective date: 20090710

AS Assignment

Owner name: GM GLOBAL TECHNOLOGY OPERATIONS, INC., MICHIGAN

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:UNITED STATES DEPARTMENT OF THE TREASURY;REEL/FRAME:025246/0056

Effective date: 20100420

AS Assignment

Owner name: GM GLOBAL TECHNOLOGY OPERATIONS, INC., MICHIGAN

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:UAW RETIREE MEDICAL BENEFITS TRUST;REEL/FRAME:025315/0091

Effective date: 20101026

AS Assignment

Owner name: WILMINGTON TRUST COMPANY, DELAWARE

Free format text: SECURITY AGREEMENT;ASSIGNOR:GM GLOBAL TECHNOLOGY OPERATIONS, INC.;REEL/FRAME:025324/0555

Effective date: 20101027

AS Assignment

Owner name: GM GLOBAL TECHNOLOGY OPERATIONS LLC, MICHIGAN

Free format text: CHANGE OF NAME;ASSIGNOR:GM GLOBAL TECHNOLOGY OPERATIONS, INC.;REEL/FRAME:025781/0299

Effective date: 20101202

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION