CN1035125C - Injection pump for diesel engines - Google Patents
Injection pump for diesel engines Download PDFInfo
- Publication number
- CN1035125C CN1035125C CN94191437A CN94191437A CN1035125C CN 1035125 C CN1035125 C CN 1035125C CN 94191437 A CN94191437 A CN 94191437A CN 94191437 A CN94191437 A CN 94191437A CN 1035125 C CN1035125 C CN 1035125C
- Authority
- CN
- China
- Prior art keywords
- pump
- rocking arm
- plunger
- injection pump
- pinch roller
- 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.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 230000013011 mating Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- F02M59/10—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
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- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
An injection pump (4) for a diesel engine has a pump piston (19) which is guided in the pump cylinder (22) and may be actuated by a cam drive. The cam drive is designed as a spring-loaded rocker (3) actuated by the camshaft (1). The end of the rocker (3) at the pump side cooperates with the associated end of the pump piston (19). Both ends are loosely interconnected by a collet (20).
Description
The present invention relates to a kind of diesel injection pump, it comprises a pump plunger that is contained in the plunger guide bush, this pump plunger shaft is plugged with a base of widening and is handled by camshaft actuated and spring-loaded rocking arm by one, and wherein the pinch roller in the end that is positioned at pump side of rocking arm directly and the seating plane mating reaction of pump plunger.
In the known Injection Pump (referring to EP-A-0027441) that has a cam drive mechanism, be provided with the roller tappet by guide sleeve guiding of a linearity between pump plunger and driving cam, it is in operation and is subjected to the effect of a pressure spring and keeps in touch with driving cam all the time.Pump plunger and guide sleeve are axially aligned the ground linearity and are guided to be contained in the plunger guide bush, should further avoid acting on flank force on the pump plunger by the linear steering of roller.Yet in practice, between the linear steering of the linear steering of pump plunger and roller tappet, have certain off(-)center all the time.In addition, the little flank force that acts on the pump plunger can not be got rid of fully, because the linear steering parts of roller tappet also have inevitable gap.
In addition, also disclose a kind of Injection Pump (referring to US-A-1451228), wherein, the outer end of pump plunger is expanded by means of a nut head, and one is installed in a pinch roller on the rocking arm and acts on this nut head.For pinch roller is close on this nut head reliably, pump plunger is pressed on this pinch roller by a pressure spring tensioning.
In a kind of Injection Pump that the independent roller tappet that does not have linear steering also can move, also acting on not too little transverse force on the pump plunger, so pump plunger needs a long especially cage guiding part.
At last, in a kind of known Injection Pump driving mechanism (referring to CH-A-384289), one has the rocking arm of three arms to produce a DESMODROMI-SCHE connection between camshaft and pump plunger.Rocking arm is not worked under spring-loaded in this form of implementation, and coefficient parts must be processed with high precision in its surface of contact zone, and its consequence is that processing charges is high.In addition, common engine structure does not allow Injection Pump directly is contained on the camshaft.
Correspondingly, the Injection Pump that the object of the present invention is to provide a kind of this paper to start described type also greatly avoids acting on the transverse force on the Injection Pump, simplifies the structure of the plunger guide parts of Injection Pump simultaneously, reduces its cost thus.
The object of the present invention is achieved like this, that is, a spring action is arranged on rocking arm in the end away from pump side of rocking arm, and rocking arm is pressed on the cam of camshaft, and base and pinch roller are movably linked together by a chuck each other.
In this Injection Pump, not only cancelled to having the set tappet driving mechanism of pump plunger of the linear steering parts that match and common piston spring, and less than the expense height, capacious Injection Pump, and only have the plunger guide bush of the valve seat that matches.The entire pump assembly is contained in the corresponding hole of crankcase, and is driven by a direct rocking arm through camshaft control from here.The end that is positioned at cam one side of rocking arm is supported by a pressure spring, thereby rocking arm remains with the camshaft actuated cam and contacts; Chuck in the end that is positioned at pump one side of rocking arm is connected on the seating plane of pump plunger loosely, has therefore also cancelled the assembly that is associated with it except having cancelled driving the tappet, comprises piston spring, guide sleeve and the housing parts that surrounds these parts.Because spring is moved on on the end relative with pump plunger of rocking arm, eliminated owing to the asymmetric flank force that acts on the pump plunger place that produces of spring herein pump plunger can not be connected on the relative rocking arm end by an independent driving component stuckly.
Test shows, a kind ofly reduces to the ask for something that the plunger pump that has only fewer parts can especially satisfy small diesel engine according to suggestion of the present invention, and wherein the cost of especially advantageously realizing thus reduces.
The pinch roller of operate pump plunger is preferably formed by taking turns in a foreign steamer and one, and they are plug-in tightly coaxially, and the oil film by gap between wheel can reach certain error compensation thus.Thereby when Injection Pump is worked the pump plunger seating plane can and pinch roller between the contact of favourable linearity.
For the purpose of assembling, chuck is fixed on the end of rocking arm swingably, and clamps the base of widening of pump plunger in the final position of packing into by a dividing plate, makes base pinch be held between dividing plate and the pinch roller.For fear of wearing and tearing and stuck, base should be clamped between dividing plate and the pinch roller with minimum gap.
About the structure of the base of pump plunger, the present invention abandons the center projections that is provided with as surface of contact usually, with corresponding the widening (so-called DRUCKSONNE) that helps supporting surface, realizes thus contacting with the favourable linearity of pinch roller.
The present invention is further illustrated below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the cross sectional representation of camshaft and the Injection Pump that matches;
Fig. 2 is the sectional view according to II-II line among Fig. 1.
According to Fig. 1, in a diesel engine, its camshaft 1 that has cam 2 is furnished with a rocking arm 3 that is used to drive Injection Pump 4.Bent axle 5 is meshed with a gearwheel by pitch circle 7 expressions by the small gear of joint garden 6 expressions through one, and gearwheel is drive cam shaft 1 again.The cam 2 of camshaft 1 also drives the rocking arm 8 and 9 of suction valve and outlet valve except driving rocking arm 3.The rocking arm 3 that drives Injection Pump 4 has a pairing cam 10 on the end of its camshaft side, have a pressure spring 11 to be supported on the rocking arm 3 at the opposite side of this cam, and this pressure spring makes cam 10 remain with cam 2 and contacts.Correspondingly, rocking arm 3 is swung around the rotatingshaft 12 that it is fixed on the motor; Rocking arm 3 is a Y-piece 13 from the end of the prolonged section that rotatingshaft 12 extends out, a pinch roller 15 that is made of foreign steamer 16 and interior wheel 17 has been installed on it, it can rotate around a cross bolts 14, is supporting pump plunger 19 through a base of widening 18 on the pinch roller 15.Base 18 remains between pinch roller 15 and sample can be installed around cross bolts 14 swings one by one the chuck 20 with the narrow gap of 0.05-0.1mm, and the dividing plate 21 of chuck 20 is contained on the upper side of plunger base 18.
Be contained in its plunger guide bush that surrounds 22, plunger guide bush 22 has an oil inlet hole 23 and a spill port 24 pump plunger 19 linear steerings.The place, the inner of pump plunger 19 is provided with conventional control curve (oil supply) 25, and they are regulated by the controlling device 26 that the plan view among Fig. 2 is shown specifically.Different operating point according to motor, utilize controlling device 26 that the direction of pump plunger 19 around its longitudinal axis along double-head arrow 27 rotated, this rotation is undertaken by a drive link 28, between the positioning disk 29 of drive link 28, handle the adjusting bolt 30 be contained in therebetween and by regulate bolt 30 handle one with the pump plunger 19 antitorque revolving parts that are connected 31.
The top of plunger guide bush 22 constitutes the valve seat of valve 32,33 and is bearing in the hole 34 of a pipe joint 35, and high-pressure oil duct 36 is arranged in the pipe joint 35.
The dividing plate 21 of chuck 20 is porose 37 on a side, before the final position of base 18 shown in swinging to along arrow half 38, plunger base 18 can be passed these holes 37 at dividing plate 21.
Claims (6)
1, diesel injection pump (4), comprise a pump plunger (19) that guides to be contained in the plunger guide bush (22), this pump plunger (19) has a base of widening (18) and is handled by camshaft (1) driving and spring-loaded rocking arm (3) by one, the pinch roller in the end that is positioned at pump side of one of them rocking arm (3) (15) directly and the seating plane mating reaction of plunger (19), it is characterized in that, the place, end away from pump side at rocking arm (3) has a spring (11) to act on the rocking arm (3), and rocking arm (3) is pressed on the cam (2) of camshaft (1), base (18) and pinch roller (15) are movably linked together by a chuck (20) each other.
According to the Injection Pump of claim 1, it is characterized in that 2, the axial dimension of pinch roller (15) is corresponding to the diameter of the seating plane of pump plunger (19), seating plane is the plane, to realize linear contact.
According to the Injection Pump of claim 1, it is characterized in that 3, pinch roller (15) is made of wheel (17) in a foreign steamer (16) and, they are tightly plug-in coaxially.
According to the Injection Pump of claim 1, it is characterized in that 4, chuck (20) is fixed on the end of relative rocking arm (3), and utilize a dividing plate (21) to clamp the base of widening (18) of pump plunger (19).
According to the Injection Pump of claim 4, it is characterized in that 5, the base (18) of pump plunger (19) is contained between dividing plate (21) and the pinch roller (15) with a gap.
6, according to the Injection Pump of claim 1, it is characterized in that chuck (20) and coaxial being installed in swingably on the rocking arm (3) of pinch roller (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4307699A DE4307699C2 (en) | 1993-03-11 | 1993-03-11 | Injection pump for diesel engine |
| DEP4307699.8 | 1993-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1119034A CN1119034A (en) | 1996-03-20 |
| CN1035125C true CN1035125C (en) | 1997-06-11 |
Family
ID=6482510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94191437A Expired - Fee Related CN1035125C (en) | 1993-03-11 | 1994-03-10 | Injection pump for diesel engines |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0774068B1 (en) |
| JP (1) | JP3476822B2 (en) |
| CN (1) | CN1035125C (en) |
| AU (1) | AU6283994A (en) |
| DE (2) | DE4307699C2 (en) |
| WO (1) | WO1994020748A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957673A (en) * | 1993-03-11 | 1999-09-28 | Motorenfabrik Hatz Gmbh & Co. Kg. | Injection pump for diesel engines |
| SE501026C2 (en) * | 1993-03-17 | 1994-10-24 | Volvo Ab | Fuel injection device for internal combustion engines |
| US5588413A (en) * | 1995-03-14 | 1996-12-31 | Caterpillar Inc. | Engine assembly with leaf spring cam follower |
| DE112011106042B4 (en) * | 2011-12-27 | 2018-08-09 | Toyota Jidosha Kabushiki Kaisha | driving device |
| CN102953952A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Oil pump on motor vehicle engine |
| CN102953971B (en) * | 2012-11-22 | 2016-04-06 | 江苏高博智融科技有限公司 | Long life oil pump |
| CN102953954A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Electric oil pump |
| DE102014223597B4 (en) * | 2014-10-08 | 2019-02-07 | Continental Automotive Gmbh | Roller for a roller tappet of a high-pressure fuel pump, roller tappet, high-pressure fuel pump and internal combustion engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1451228A (en) * | 1919-07-26 | 1923-04-10 | Dodge Tool Company | Fuel-feeding device for internal-combustion engines |
| DE408310C (en) * | 1922-11-14 | 1925-01-10 | Steiner Carl | Valve control with angled rocker arm, especially for internal combustion engines |
| GB294427A (en) * | 1927-12-15 | 1928-07-26 | Edward Ronald D Alessio | Improvements in and relating to valve-operating mechanism in internal combustion engines |
| US2424943A (en) * | 1943-02-26 | 1947-07-29 | Cav Ltd | Fuel pump |
| CH348289A (en) * | 1958-08-02 | 1960-08-15 | Cardelli Dino | Injection pump for internal combustion engine |
| DE1919993A1 (en) * | 1969-04-19 | 1970-11-05 | Volkswagenwerk Ag | Holder for rocker arm of valve controls |
| AT366474B (en) * | 1979-10-15 | 1982-04-13 | Friedmann & Maier Ag | INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
-
1993
- 1993-03-11 DE DE4307699A patent/DE4307699C2/en not_active Expired - Fee Related
-
1994
- 1994-03-10 EP EP94910406A patent/EP0774068B1/en not_active Expired - Lifetime
- 1994-03-10 AU AU62839/94A patent/AU6283994A/en not_active Abandoned
- 1994-03-10 CN CN94191437A patent/CN1035125C/en not_active Expired - Fee Related
- 1994-03-10 DE DE59406244T patent/DE59406244D1/en not_active Expired - Fee Related
- 1994-03-10 WO PCT/EP1994/000746 patent/WO1994020748A1/en not_active Ceased
- 1994-03-10 JP JP51960294A patent/JP3476822B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0774068B1 (en) | 1998-06-10 |
| DE4307699A1 (en) | 1994-09-15 |
| DE4307699C2 (en) | 1996-03-28 |
| AU6283994A (en) | 1994-09-26 |
| WO1994020748A1 (en) | 1994-09-15 |
| CN1119034A (en) | 1996-03-20 |
| JP3476822B2 (en) | 2003-12-10 |
| EP0774068A1 (en) | 1997-05-21 |
| JPH08510026A (en) | 1996-10-22 |
| DE59406244D1 (en) | 1998-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |