Air inlet and exhaust cam structure of motorcycle engine
A technology of exhaust cam and intake cam, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve the problems of loud impact sound and unstable engine operation, and achieve the effect of reducing impact sound and improving stability.
Inactive Publication Date: 2016-01-20
CHINA JIALING IND GROUP
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Problems solved by technology
[0002] At present, after the motorcycle engine is changed from the carburetor state to the EFI state, the engine in the EFI state has the problems of unstable operation and loud impact noise when idling. Therefore, it is urgent to solve the above technical problems
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[0009] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0010] Such as figure 1 As shown, an intake and exhaust cam structure of a motorcycle engine includes an intake cam 1 and an exhaust cam 2, wherein the exhaust cam 2 has an exhaust maximum lift phase angle α, and the intake cam 1 and the exhaust cam There is an intake and exhaust maximum lift phase angle γ between the gas cams 2, which is characterized in that: the value of the exhaust maximum lift phase angle α is 122°-β, and the intake and exhaust maximum lift The value of the phase angle γ is 98°+β, and the value of β is 2°-8°. In the present case, the value of said β is preferably 5°.
[0011] The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should b...
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The invention discloses an air inlet and exhaust cam structure of a motorcycle engine. The air inlet and exhaust cam structure comprises an air inlet cam (1) and an air exhaust cam (2). The air exhaust cam (2) has an air exhaust maximum lift phase angle (alpha), and an air inlet and exhaust maximum lift phase included angle (gamma) is formed between the air inlet cam (1) and the air exhaust cam (2). The air inlet and exhaust cam structure is characterized in that the numerical value of the air exhaust maximum lift phase angle (alpha) is (122-beta) degrees, the numerical value of the air inlet and exhaust maximum lift phase included angle (gamma) is (98+beta) degrees, and the numerical value of beta is (2-8) degrees. According to the air inlet and exhaust cam structure of the motorcycle engine, the air exhaust maximum lift phase angle is properly reduced, and the air inlet and exhaust maximum lift phase included angle is increased at the same time; and experiments show that the strike sound of the corrected electronic injection state engine in an idling condition is effectively reduced, and therefore stability during operation can also be improved, and a big problem is well solved through small alteration.
Description
technical field [0001] The invention belongs to the field of motorcycle engines, in particular to an intake and exhaust cam structure of a motorcycle engine. Background technique [0002] At present, after the motorcycle engine is changed from the carburetor state to the EFI state, the engine in the EFI state has the problems of unstable operation and loud impact noise when idling. Therefore, it is urgent to solve the above technical problems. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an intake and exhaust cam structure of a motorcycle engine, in order to reduce the impact sound when the engine is idling in the EFI state. [0004] The technical scheme of the present invention is as follows: an intake and exhaust cam structure of a motorcycle engine, comprising an intake cam (1) and an exhaust cam (2), wherein the exhaust cam (2) has an exhaust maximum lift phase angle (α), and there is an intake and exhaus...
Claims
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IPC IPC(8): F01L1/06F01L13/00
Inventor 王尚礼刘小林谭红梅姚强伟
Owner CHINA JIALING IND GROUP