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Combustion engine with a motor brake device

一种发动机制动、内燃机的技术，应用在发动机控制、发动机元件、机器/发动机等方向，能够解决没有保证气体交换、阀门没有完全闭合、排气阀啪嗒噪声等问题，达到安全和有效安装和运行、节省位置空间、啪嗒噪声降低的效果

Active Publication Date: 2010-01-13
MAN TRUCK & BUS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the valve clearance is inadvertently adjusted too small by the installer or maintenance personnel, there will be a rattling noise of the exhaust valve between the rocker and the valve bridge and there is a risk of damage to the valve actuator
Also, if the exhaust valve is not opened enough, then complete gas exchange is not guaranteed
If the valve clearance is set too small, there is the risk that the valve will not close completely in the hot state and thus burn through

Method used

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  • Combustion engine with a motor brake device
  • Combustion engine with a motor brake device
  • Combustion engine with a motor brake device

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] Below with the help of figure 1 A first embodiment of the present invention will be described. An internal combustion engine 1 provided with an engine braking device 2 has a plurality of figure 1 The cylinders, not shown, each delimit a combustion chamber. Air or an air-fuel mixture can be supplied to each of the fuel chambers by means of at least one intake valve. In addition, each fuel chamber has two exhaust valves 3 and 4 , by means of which exhaust gas can be discharged into the exhaust tract. Exhaust valves 3 and 4 can be activated and actuated mechanically by means of a common valve bridge 5 . The valve bridge 5 is part of the connecting mechanism that connects the exhaust valves 3 and 4 to the internal combustion engine 1 . figure 1 Camshaft not shown in the connection. In addition, the linkage mechanism includes a figure 1 A rocker that is supported in a swivel manner is not shown. The rocker acts on the valve bridge 5 via a partially shown contact pin 6...

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Abstract

The invention relates to an internal combustion engine with an engine brake device. The internal combustion engine includes has at least a combustion chamber, from which exhaust gas can be discharged by means of at least an exhaust valve (3, 4) as well as an a hydraulic valve auxiliary control unit (22) of an engine brake device (2), and the valve (3) is held in the middle opened position by means of a hydraulic valve auxiliary control unit (22) when operating the engine brake device (2). Furthermore, the internal combustion engine (1) includes a hydraulic valve clearance compensation mechanism (45) for a valve (3,4) and a oil groove (59), and the oil groove (59) is equipped between the hydraulic valve auxiliary control unit (22) and the valve clearance compensation mechanism (45) for supplying oil for the hydraulic valve auxiliary control unit (22), and is closed by a closure unit (63) for compensating the valve clearance of the exhaust valve (3, 4).

Description

technical field [0001] The invention relates to an internal combustion engine according to the preamble of claim 1 . Background technique [0002] Such internal combustion engines are described, for example, in EP 0736672B1 and EP 1526257A2. The engine brakes of these internal combustion engines are accordingly a hybrid of an engine blocking brake and a pressure relief brake, which is also in particular designed as an EVB (=Exhaust-Valve-Brave). In the variant according to EP 0736672 B1, this hydraulic valve-additional control unit is installed in the rocker of the linkage and in the variant according to EP 1526257 A2, it is mounted on one side of the linkage while actuating the two exhaust valves in the valve bridge. The hydraulic valve-additional control unit is supplied with oil by means of the existing oil circuit of the respective internal combustion engine. In both variants, a separate adjusting screw is provided for compensating the play of the exhaust valve, by me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F01L1/24F02D13/04
CPCF01L13/06F01L13/065F01L1/26
Inventor H·-W·迪利
Owner MAN TRUCK & BUS AG
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