Rocker arm assembly return structure and variable valve lift mechanism
A technology of rocker arm assembly and rocker arm shaft, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems of rocker arm roller and cam collision, cam and rocker arm roller contact wear and other problems, and achieve Increase wear and avoid the effect of jumping back and forth
Active Publication Date: 2021-10-08
DONGFENG COMML VEHICLE CO LTD
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Problems solved by technology
[0007] The embodiment of the present application provides a return structure of the rocker arm assembly and a variable valve lift mechanism to solve the problem that in the related art, during the process of changing the valve lift, the rocker arm rollers and the cam will continuously collide, which will aggravate the contact between the cam and the cam. The problem of wear on the contact part of the rocker roller
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[0047] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.
[0048] The embodiment of the present application provides a rocker arm assembly return structure, so as to solve the problem that the rocker arm roller and the cam will continuously collide in the process of changing the valve lift in the related art, which will aggravate the contact between the cam and the rocker arm roller. wear ...
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The invention relates to a rocker arm assembly return structure and a variable valve lift mechanism. The structure comprises a rocker arm, a second mounting support and an elastic piece, the rocker arm is used for being arranged on a rocker arm shaft in a sleeving manner and rotating with the rocker arm shaft as the center, and a first mounting support is arranged at the side, close to a rocker arm roller, of the rocker arm; the second mounting support and the rocker arm are distributed in the axial direction of the rocker arm shaft, and the second mounting support is used for being fixedly connected to the rocker arm shaft; an extension part is arranged at the side, close to a valve bridge assembly, of the second mounting support; and the two ends of the elastic piece are connected with the extension part and the first mounting support correspondingly, and the elastic piece is used for making the rocker arm roller make contact with a cam when the cam rotates. As the second mounting support with the extension part is fixed on the rocker arm shaft, and one end of the elastic piece is fixed, the extension part provides a fixed base point at the moment, the elastic potential energy of the elastic piece is released, and the first mounting support is pushed reversely, so that the rocker arm roller on the rocker arm is always in contact with the cam when the rocker arm works; and the problem of continuous collision between the rocker arm roller and the cam is avoided.
Description
technical field [0001] The present application relates to the field of vehicle engine gas distribution structures, and in particular, to a rocker arm assembly return structure and a variable valve lift mechanism. Background technique [0002] At present, various engine valve control technologies for automobiles are various to improve in-cylinder combustion under different working conditions, so that the engine has a good response in high-speed and low-speed regions, and the fuel economy and power performance of the engine are improved. The purpose of engine valve control technology is to change the amount of intake air to improve performance and reduce fuel consumption. Since the car always encounters the basic processes of idling, acceleration, uniform speed and deceleration during driving, if all the processes are used If you change the valve, it will reduce the cost performance. For example, when the car is just starting, if a large amount of air is inhaled at this time,...
Claims
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IPC IPC(8): F01L1/18F01L1/344
CPCF01L1/18F01L1/344
Inventor 吴囿霖张芳万虎李庆华
Owner DONGFENG COMML VEHICLE CO LTD