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Internal combustion engine having a motor brake device

一种内燃机、阀控制的技术，应用在发动机控制、发动机元件、机器/发动机等方向，能够解决阀不完全关闭、烧穿、排出阀打开不充分等问题，达到安装和运行可靠且、安装和运行高效、优化排气特性的效果

Active Publication Date: 2011-04-27
MAN TRUCK & BUS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

it's cumbersome
If the installer or maintenance person inadvertently adjusts the valve clearance too far, there will be a rattling noise between the rocker and the valve bridge and there is a risk of damage to the valve train
Furthermore, the discharge valve does not open sufficiently to ensure adequate gas exchange
If the valve clearance is adjusted too small, there is a risk that the valve will not close completely in the hot state and burn through

Method used

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  • Internal combustion engine having a motor brake device
  • Internal combustion engine having a motor brake device
  • Internal combustion engine having a motor brake device

Examples

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Embodiment Construction

[0023] Compare below figure 1 The first embodiment of the present invention will be described. An internal combustion engine 1 with an engine brake 2 has several figure 1 The cylinders, not shown, define combustion chambers, respectively. Air or an air-fuel mixture can be supplied to each combustion chamber via at least one inlet valve. Furthermore, each combustion chamber is assigned two outlet valves 3 and 4 by means of which exhaust gas can be discharged into the exhaust gas duct. The outlet valves 3 and 4 can be mechanically controlled and actuated via a common valve bridge 5 . The valve bridge 5 is part of the connecting mechanism which connects the outlet valves 3 and 4 to the internal combustion engine 1. figure 1 Camshaft connection not shown. The connecting mechanism comprises a pivotably mounted rocker 6 which acts via a contact pin 7 on the valve bridge 5 . For this purpose, the contact pin 7 is provided at its free end with a support ball 8 articulated with a...

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PUM

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Abstract

An internal combustion engine (1) includes exhaust valves (3, 4) for removing exhaust gas from a combustion chamber and an engine braking device (2) with a hydraulic valve control unit (29) by which the exhaust valves are held in an intermediate open position when the engine braking device (2) is actuated. The internal combustion engine (1) includes a hydraulic valve lash compensation mechanism (11) for the exhaust valves (3, 4) and a control channel (41) formed between the hydraulic valve control unit and an oil feed channel (9) for feeding oil to the hydraulic valve control unit (29) which can be closed by a closure element (48) to compensate for valve lash of the exhaust valves (3, 4). A counter-holder (53) is constructed as a piston-cylinder unit that forms a variable stop (52) for a valve bridge (5) cooperating with the valve lash compensation mechanism (11).

Description

technical field [0001] The invention relates to an internal combustion engine according to the preamble of claim 1 . Background technique [0002] Such an internal combustion engine is described, for example, in EP 1526257 A2. Such an engine braking device for an internal combustion engine is a hybrid of engine differential pressure braking and decompression braking, which is called EVB (=Exhaust-Valve-Brake). The hydraulic valve control unit protrudes on one side into a valve bridge, which can actuate both outlet valves simultaneously. The valve control unit is supplied with oil from the oil circuit already present in the internal combustion engine. In order to compensate the valve clearance of the discharge valve, a special adjustment screw is provided, which is used for valve clearance adjustment during engine installation or during regular maintenance thereafter. This is very cumbersome. If installers or maintenance personnel inadvertently adjust the valve clearance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F01L1/24F02D13/04
CPCF01L1/26F01L1/24F01L13/06
Inventor H-W·迪利
Owner MAN TRUCK & BUS AG
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