CN203067046U

CN203067046U - Camshaft of four-cylinder four-valve diesel engine

Info

Publication number: CN203067046U
Application number: CN 201320001478
Authority: CN
Inventors: 周梅; 谢克艳; 于春杰; 熊莹; 王朝晖; 王何磊
Original assignee: LUOYANG TRACTOR RESEARCH INSTITUTE Co Ltd
Current assignee: LUOYANG TRACTOR RESEARCH INSTITUTE Co Ltd
Priority date: 2013-01-04
Filing date: 2013-01-04
Publication date: 2013-07-17
Anticipated expiration: 2023-01-04

Abstract

A camshaft of a four-cylinder four-valve diesel engine comprises a key, a first cylinder inlet cam, a first cylinder exhaust cam, a second cylinder inlet cam, a second cylinder exhaust cam, a third cylinder inlet cam, a third cylinder exhaust cam, a fourth cylinder inlet cam and a fourth cylinder exhaust cam. A camshaft key is arranged at the front end of the camshaft, the intersection angle of the nose central line of the first cylinder inlet cam and the central line of the key is 2.5+/-1 degrees, and the intersection angel of the nose central line of the first cylinder exhaust cam and the central line of the key is 105.75+/-1 degrees. The intersection angle of the nose central line of the second inlet cam and the central line of the key is 87.5+/-1 degrees, and the intersection angle of the nose central line of the second exhaust cam and the central line of the key is 194.75+/-1 degrees. The intersection angle of the nose central line of the third cylinder inlet cam and the central line of the key is 267.5+/-1 degrees, and the intersection angle of the nose central line of the third cylinder exhaust cam and the central line of the key is 15.75+/-1 degrees. The intersection angle of the nose central line of the fourth cylinder inlet cam and the central line of the key is 177.5+/-1 degrees, and the intersection angle of the nose central line of the fourth cylinder exhaust cam and the central line of the key is 285.75+/-1 degrees. Compared with the prior art, the camshaft can effectively meet the working needs of the four-cylinder four-valve diesel engine by changing the angles of cams.

Description

A kind of four cylinder four-valve diesel engine camshafts

Technical field:

The utility model belongs to field of internal combustion engine, relates to a kind of cam shaft for diesel engine, relates in particular to a kind of four cylinder four-valve diesel engine camshafts.

Background technique:

Fast development along with China's ic engine industry, and more and more stricter emission regulation demands, the diesel engine product wants to possess wide competitive ability and the market demand, must solve the problem that power is little, oil consumption is high, discharging is poor, is the optimal paths that address this problem so adopt four Valves Technology.Four-valve diesel engine can increase circulation area, reduces gas exchange loss, improves charging efficiency, can more effectively impel the oil gas mixing and burning.Existing four-valve diesel engine camshaft by regulating port timing and lift and camshaft is carried out architecture advances, and is changed the structure of rocking arm, push rod and valve assembly, will better meet the need of work of four-valve diesel engine.

The model utility content:

It is a kind of simple in structure, reasonable in design that the purpose of this utility model is to provide, and can satisfy four cylinder four-valve diesel engine camshafts of usage requirement.

The technical solution of the utility model is: a kind of four cylinder four-valve diesel engine camshafts comprise: key, a cylinder intake cam, a cylinder exhaust cam, two cylinder intake cam, two cylinder exhaust cam, three cylinder intake cams, three cylinder exhaust cams, four cylinder intake cams, four cylinder exhaust cams; Key on the camshaft is arranged on the camshaft front end, and cylinder intake cam peach point center line and key center line angle are 2.5 ° ± 1 °, one cylinder exhaust cam peach point center line and key center line angle are 105.75 ° ± 1 °, two cylinder intake cam peach point center line and key center line angle are 87.5 ° ± 1 °, two cylinder exhaust cam peach point center line and key center line angle are 194.75 ° ± 1 °, three cylinder intake cam peaches point center line and key center line angle are 267.5 ° ± 1 °, three cylinder exhaust cam peaches point center line and key center line angle are 15.75 ° ± 1 °, four cylinder intake cam peaches point center line and key center line angle are 177.5 ° ± 1 °, four cylinder exhaust cam peaches point center line and key center line angle are 285.75 ° ± 1 °.

The utility model can reach following positive role after adopting above technological scheme: by the change of port timing and lift, can reduce speed, acceleration and the jerk of valve, reduce the rigidity of valve inertial force and valve spring, improve plentiful curve, reduce the contact stress of camshaft and tappet, make its stable working, vibration noise is little.

Description of drawings:

Fig. 1 is the utility model A kind of four cylinders, four valvesThe structural representation of cam shaft for diesel engine.

Fig. 2 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine one cylinder intake cam peach point center line and key center line angle schematic representation;

Fig. 3 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine one cylinder exhaust cam peach point center line and key center line angle schematic representation;

Fig. 4 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine two cylinder intake cam peach point center line and key center line angle schematic representation;

Fig. 5 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine two cylinder exhaust cam peach point center line and key center line angle schematic representation;

Fig. 6 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine three cylinder intake cam peaches point center line and key center line angle schematic representation;

Fig. 7 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine three cylinder exhaust cam peaches point center line and key center line angle schematic representation;

Fig. 8 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine four cylinder intake cam peaches point center line and key center line angle schematic representation;

Fig. 9 is the utility model A kind of four cylinders, four valvesCam shaft for diesel engine four cylinder exhaust cam peaches point center line and key center line angle schematic representation.

Embodiment:

Below in conjunction with accompanying drawing the utility model is described further.Shown in Fig. 1～9, a kind of Four cylinders, four valvesCam shaft for diesel engine comprises: key 1, a cylinder intake cam 2, a cylinder exhaust cam 3, two cylinder intake cam 4, two cylinder exhaust cam 5, three cylinder intake cams 6, three cylinder exhaust cams 7, four cylinder intake cams 8, four cylinder exhaust cams 9; It is characterized in that: cam axle key 1 is arranged on the camshaft front end, and a cylinder intake cam 2 peaches point center line and key 1 center line angle α 1 are 2.5 ° ± 1 °, one cylinder exhaust cam, 3 peaches point center line and key 1 center line angle α 2 are 105.75 ° ± 1 °, two cylinder intake cam 4 peaches point center line and key 1 center line angle α 3 are 87.5 ° ± 1 °, two cylinder exhaust cam 5 peaches point center line and key 1 center line angle α 4 are 194.75 ° ± 1 °, three cylinder intake cams, 6 peaches point center line and key 1 center line angle α 5 are 267.5 ° ± 1 °, three cylinder exhaust cams, 7 peaches point center line and key 1 center line angle α 6 are 15.75 ° ± 1 °, four cylinder intake cams, 8 peaches point center line and key 1 center line angle α 7 are 177.5 ° ± 1 °, four cylinder exhaust cams, 9 peaches point center line and key center line angle α 8 are 285.75 ° ± 1 °.

Test shows, by the change of port timing and lift, can increase the diesel engine circulation area, reduces gas exchange loss, improves charging efficiency, can more effectively impel the oil gas mixing and burning, better meets the need of work of four-valve diesel engine.

Claims

1. a cylinder four-valve diesel engine camshaft comprises: key (1), a cylinder intake cam (2), a cylinder exhaust cam (3), two cylinder intake cam (4), two cylinder exhaust cam (5), three cylinder intake cams (6), three cylinder exhaust cams (7), four cylinder intake cams (8), four cylinder exhaust cams (9); It is characterized in that: cam axle key (1) is arranged on the camshaft front end, and cylinder intake cam (2) peach point center line and key (1) center line angle (α 1) are 2.5 ° ± 1 °, one cylinder exhaust cam (3) peach point center line and key (1) center line angle (α 2) are 105.75 ° ± 1 °, two cylinder intake cam (4) peach point center line and key (1) center line angle (α 3) are 87.5 ° ± 1 °, two cylinder exhaust cam (5) peach point center line and key (1) center line angle (α 4) are 194.75 ° ± 1 °, three cylinder intake cam (6) peaches point center line and key (1) center line angle (α 5) are 267.5 ° ± 1 °, three cylinder exhaust cam (7) peaches point center line and key (1) center line angle (α 6) are 15.75 ° ± 1 °, four cylinder intake cam (8) peaches point center line and key (1) center line angle (α 7) are 177.5 ° ± 1 °, four cylinder exhaust cam (9) peaches point center line and key (1) center line angle (α 8) are 285.75 ° ± 1 °.