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Combustion engine with a motor brake device and a valve lash adjusting mechanism

A technology of engine braking and valve clearance, applied in the direction of engine control, engine components, machines/engines, etc., can solve the problems of valve transmission mechanism damage, exhaust valve flapping, exhaust valve opening insufficient, etc., to achieve Run Reliable Effects

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

AI Technical Summary

Problems solved by technology

This thing is costing money and time
If the valve clearance is fitted or accidentally adjusted too small by the maintenance personnel, this results in a rattling noise of the exhaust valves and there is a risk of damage to the valve train
If the valve clearance is inadvertently adjusted too large, the exhaust valves will not open sufficiently so that complete gas exchange cannot be ensured

Method used

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  • Combustion engine with a motor brake device and a valve lash adjusting mechanism

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Embodiment Construction

[0019] The internal combustion engine 1 has a plurality of cylinders not shown in the drawings, each of which has a combustion chamber. Air or air-fuel mixture can be supplied to each of the combustion chambers by means of at least one intake valve. Furthermore, in the illustrated embodiment, each combustion chamber has two exhaust valves 3 and 4, by means of which exhaust gas can be discharged into the exhaust pipe. The exhaust valves 3 and 4 can be controlled and manipulated mechanically by means of a common valve bridge 5. The valve bridge 5 is a component of a connecting mechanism that connects the exhaust valves 3 and 4 to a camshaft of the internal combustion engine 1 not shown in the drawings. In addition, the connecting mechanism includes a rotatably supported valve rocker which is also not shown in the drawings. The valve rocker affects the valve bridge 5 through a part of the contact pin 6 shown. For this purpose, the contact pin 6 is equipped on its free end with ...

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PUM

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Abstract

The invention relates to an internal combustion engine with a engine brake mechanism and a valve clearance compensation mechanism, and the internal combustion engine has at least a combustion chamber, from which exhaust gas can be discharged by means of at least an exhaust valve (3, 4). Furthermore, the internal combustion engine includes an engine brake mechanism (2) with an hydraulic valve auxiliary control unit (19), and the valve auxiliary unit is integrated in a connecting mechanism (5, 6, 7) for connecting the exhaust valve (5) and the camshaft, and the valve auxiliary control unit (12) keeps the exhaust valve (3) in a temporary opening position when operating the engine brake mechanism, and a hydraulic valve clearance compensation mechanism (37) for the exhaust valve (3, 4). The valve clearance compensation mechanism for oil supply is connected to a main oil circle. The hydraulic valve auxiliary control unit (19) is connected to another auxiliary oil circle equipped related to the main oil circle.

Description

Technical field [0001] The present invention relates to an internal combustion engine with at least one combustion chamber. Exhaust gas can be discharged from the combustion chamber by means of at least one exhaust valve. It includes an engine braking device with a hydraulic valve auxiliary control unit, which is controlled by It is integrated in a connecting mechanism that connects the exhaust valve to the camshaft, and the valve assist control unit maintains the exhaust valve in a temporarily opened position when the engine brake device is operated. Background technique [0002] Such internal combustion engines are described in EP0736672B1 and EP1526257A2, for example. The engine braking device of the internal combustion engine respectively involves a hybrid form of an engine dynamic pressure brake and a pressure reducing brake, and this hybrid form is especially also called EVB (=exhaust valve brake device). The hydraulic valve assist control unit is installed in the valve ro...

Claims

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Application Information

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IPC IPC(8): F01L13/06F01L1/245F02D13/04
CPCF01L13/065F01L1/245F01L1/24F01L13/06
Inventor H·-W·迪利H·－W·迪利
Owner MAN NUTZFAHRZEUGE AG
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