A gear rack type engine brake mechanism
A technology of engine and gear teeth, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of affecting the use effect of the engine, the reduction of braking power value, and the high failure rate, so as to achieve obvious advantages in braking power and slow down The effect of low vehicle speed and failure rate
Active Publication Date: 2020-05-22
CHINA FIRST AUTOMOBILE
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Problems solved by technology
However, due to the large number of components in the hydraulic system, the high machining accuracy requirements, and the complex control system, it is greatly affected by the cleanliness of the oil, so the reliability is low and the failure rate is high
At the same time, under low-speed engine conditions, affected by the low oil pressure, the actual brake valve opening lift will be reduced relative to the theoretical design lift, which will lead to a decrease in the braking power value under low-speed conditions, and eventually Affects the vehicle's use of engine braking
Method used
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[0017] The preferred technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0018] As shown in the figure, a gear-and-rod engine brake mechanism of the present invention includes a rocker body 1, and the rocker body 1 is provided with a shaft hole 2, a gear rod hole 3 and a cam chamber 4 that communicate with each other;
[0019] There is a rocker shaft 5 in the shaft hole 2, and the rocker shaft 5 rotates relative to the rocker body 1 in the shaft hole 2. The rocker shaft 5 has a main oil passage 6 and a brake oil passage 7 that communicate with each other. The brake oil passage 7 has an oil supply passage 8 leading to the shaft hole 2, and the connection between the shaft hole 2 and the oil supply passage 8 is a crescent groove structure, which can ensure that the oil supply passage 8 can be more durable Inject engine oil into the gear rod hole 3, and the main oil channel 6 is controlled by a solenoid v...
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The invention discloses a gear and rod rack type engine brake mechanism. A rocker arm shaft is arranged in a shaft hole and internally provided with a main oil way and a brake oil way. A rod rack is arranged in a rod rack hole. The rod rack hole is partially located in a cam bin. A cam is arranged in the cam bin and provided with a return spring and teeth matched with the rod rack. A rocker arm body is further provided with a brake plunger. The cam rotates to eject the brake plunger out, the brake plunger can extrude a brake air valve ejection block after the cam applies force, and the brake air valve ejection block can conduct deflation after being pressed. Compared with the prior art, the gear and rod rack type mechanical brake mechanism is used for opening a brake air valve, so that the brake function of an engine is realized. The brake power is higher than that of a hydraulic brake, and is more advantageous under a low-speed work condition. Meanwhile, the mechanical brake is less affected by cleanness of engine oil, is higher in reliability and is lower in failure rate.
Description
technical field [0001] The invention relates to an engine brake mechanism, in particular to a gear rack type engine brake mechanism, which belongs to the field of vehicle precision accessories and mainly relates to the field of engines. Background technique [0002] In recent years, with the rapid development of heavy-duty commercial vehicles, engine braking has been applied more and more in practice. But what existing engine braking technology all adopted at present is hydraulic type engine brake. That is: through a set of hydraulic control device, the opening and closing of the brake exhaust valve is controlled by using the "jack" principle of the incompressibility of engine oil. However, due to the large number of components in the hydraulic system, the high machining accuracy requirements, and the complex control system, it is greatly affected by the cleanliness of the oil, so the reliability is low and the failure rate is high. At the same time, under low-speed engine...
Claims
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IPC IPC(8): F01L13/06
CPCF01L13/06
Inventor 杨振国张瑜王一江陆金龙王建武田阳韩小强白刘军
Owner CHINA FIRST AUTOMOBILE