Engine, exhaust valve brake module and exhaust valve brake hydraulic control system
An exhaust valve and brake hydraulic technology, applied in the direction of engine control, engine components, machine/engine, etc., can solve the problems of complexity, high manufacturing cost of exhaust pipe, easy damage to the overall structure of exhaust valve, etc., to simplify the overall structure. effect of structure
Active Publication Date: 2016-01-13
WEICHAI POWER CO LTD
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Problems solved by technology
[0014] In view of the above defects, the technical problem to be solved by the present invention is to provide an exhaust valve brake hydraulic control system to solve the problem that the existing exhaust valve brake device uses a butterfly valve braking method in the exhaust pipe, which causes the exhaust control to cause The problem of high cost, easy damage of exhaust valve and complex overall structure
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[0042] The core of the present invention is to provide an exhaust valve brake device to solve the problem of complex overall structure and poor The exhaust pipe brake adopts the butterfly valve, which causes the increase of manufacturing cost, and the damage caused by the impact of the exhaust valve on the valve seat under the action of pressure wave. On this basis, the present invention also provides an exhaust valve braking module using the above exhaust valve braking hydraulic control system, and an engine including the above exhaust valve braking module.
[0043] Without loss of generality, the specific structure and working principle of the specific embodiment of the exhaust valve 7 braking device provided by the present invention will be described below with reference to the accompanying drawings.
[0044] See figure 2 , which shows the hydraulic control schematic diagram of the first specific embodiment of the exhaust valve 7 brake hydraulic control system provided by...
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The invention discloses an exhaust valve brake hydraulic control system which comprises a hydraulic oil tank, a hydraulic pump, a main piston cylinder and a pressurization cylinder, wherein the hydraulic oil tank is communicated with a system oil-return oil way, the hydraulic pump pumps pressure oil from the hydraulic oil tank and conveys the pressure oil to a system pressure oil way, the main piston cylinder is arranged on the system pressure oil way and used for pushing an exhaust valve to be opened, and the pressurization cylinder is arranged among the main piston cylinder, the hydraulic oil tank and the hydraulic pump so as to enlarge pressure of the pressure oil in the main piston cylinder. Compared with the prior art, a pressurization cylinder is arranged, magnified pressure is strong enough to open the exhaust valve which is in a closed state, the pressure wave for opening the exhaust valve is obtained without placing a butterfly valve in an exhaust pipe, accordingly, a series of technical problems in the prior art due to the arrangement of the butterfly valve can be solved, the overall structure of the exhaust valve brake hydraulic control system is simplified, and the braking function of the exhaust valve can be achieved. The invention further discloses an exhaust valve brake module with the exhaust valve brake hydraulic control system being utilized, and an engine comprising the exhaust valve brake module.
Description
technical field [0001] The invention relates to the technical field of engine exhaust valve braking, in particular to an engine, an exhaust valve braking module and an exhaust valve braking hydraulic control system. Background technique [0002] With the improvement of safety awareness, higher requirements are put forward for the braking power of automobiles. When a heavy-duty vehicle goes down a long slope, under the action of gravity, the vehicle accelerates down the slope. At this time, if there is no external resistance torque to offset the gravity, the vehicle will lose control. If the main vehicle braking system is frequently used on a long slope, the brake parts will be damaged, resulting in a major safety accident. Equipping the exhaust valve auxiliary braking system on the automobile engine can increase the braking torque generated by the engine when the vehicle needs to decelerate, so that the vehicle can continuously decelerate or stabilize the vehicle speed, eff...
Claims
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IPC IPC(8): F02D13/04F01L13/06
Inventor 战强殷海红马雁
Owner WEICHAI POWER CO LTD