An in-cylinder braking device of an internal combustion engine with a three-rocker arm structure
A braking device and internal combustion engine technology, applied to valve devices, machines/engines, non-mechanically actuated valves, etc., can solve problems such as hub fatigue cracking, brake overheating, and brake braking efficiency decline, so as to improve stability and Safety, improved braking power, improved NVH effect
Active Publication Date: 2021-12-28
宁波东方动力部件有限公司
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Problems solved by technology
When going downhill for a long time, the driver has to use the brakes frequently to decelerate, which will cause the brakes to overheat, causing the brakes to gradually decrease in braking efficiency or even fail.
It is more serious on rugged mountain roads and long-slope roads. Some medium and heavy-duty commercial vehicles will install a large water tank to water the brake hub for forced cooling. However, this will accelerate the serious consequences of wheel hub fatigue cracking and directly affect Vehicle driving safety poses a great threat
In addition, in the cold winter, the water that waters the brake hub for forced cooling flows to the ground and freezes, which will cause a major safety hazard to the vehicles behind.
[0003] Due to the increasing engine power and heavy load of medium and heavy-duty commercial vehicles, in some places where the driving environment is very harsh, the conventional braking power state of the engine can no longer meet the safety requirements of driving braking.
At the same time, due to the improvement of engine manufacturing technology, the design and use environment are more compact, and the normal adjustment of the valve clearance has brought a lot of complexity and difficulty.
Method used
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Embodiment Construction
[0036] Describe the present invention in further detail below in conjunction with accompanying drawing:
[0037] Such as Figure 1 to Figure 10 As shown, an internal combustion engine in-cylinder braking device with a three-rocker arm structure includes a rocker arm assembly, and the rocker arm assembly is provided with a roller 2 that is adapted to the cam 11 on the camshaft 1. The described The rocker arm assembly includes an intake rocker arm assembly 31 assembled on the rocker arm shaft 3, an exhaust rocker arm assembly 32 and a brake rocker arm assembly 33. The valve end of the intake rocker arm assembly 31 is provided with a hydraulic tappet Assembly 4, the hydraulic tappet assembly 4 cooperates with the intake valve bridge assembly 5, the valve end of the exhaust rocker arm assembly 32 is also provided with a hydraulic tappet assembly 4, the hydraulic tappet assembly 4 is connected to the exhaust valve The bridge assembly 6 is matched, the intake valve bridge assembly ...
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The invention discloses an internal combustion engine internal-combustion brake device with a three-rocker arm structure. The valve end of the rocker arm assembly is provided with a hydraulic tappet assembly, the hydraulic tappet assembly cooperates with the valve bridge assembly, and the brake rocker arm assembly is provided with a brake valve assembly and a control valve assembly; the rocker arm shaft is provided with a lubrication oil passage and brake control oil passage, the brake rocker arm assembly is provided with a brake oil passage and a brake valve oil passage, and the brake control oil passage communicates with the control valve assembly through the brake oil passage. The control valve assembly is arranged between the brake oil passage and the brake valve oil passage, and the brake valve oil passage communicates with the brake valve assembly. The advantages are that the structure is reasonable, the braking reliability and safety can be improved, the engine noise can be reduced, and the NVH can be improved.
Description
technical field [0001] The invention relates to the technical field of automobile internal-combustion engine manufacturing, in particular to an internal-combustion engine internal-combustion engine brake device with a three-rocker structure. Background technique [0002] With the continuous development of my country's road transportation, all kinds of medium and heavy commercial vehicles have entered the transportation field of different industries, and the safety during transportation is the top priority. The braking performance of various medium and heavy-duty commercial vehicles during transportation is very important, especially when driving downhill, the driving safety is not optimistic. When going downhill for a long time, the driver must frequently use the brakes to decelerate the brakes, which will cause the brakes to overheat, causing the brakes to gradually decrease in braking efficiency or even fail. It is more serious on rugged mountain roads and long-slope road...
Claims
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IPC IPC(8): F01L13/06F01L9/10
CPCF01L13/06F01L9/10
Inventor 马振万
Owner 宁波东方动力部件有限公司