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

An engine braking and compensation mechanism technology, applied in engine control, engine components, machines/engines, etc., can solve the problems of valve transmission mechanism damage, insufficient opening of exhaust valves, cost of money and time, etc., and achieve reliable operation. Effect

Active Publication Date: 2014-01-29
MAN TRUCK & BUS 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] Internal combustion engine 1 has a plurality of cylinders, not shown in the drawing, which each have a combustion chamber. Air or an air-fuel mixture can be supplied to each of the combustion chambers by means of at least one intake valve. Furthermore, in the illustrated exemplary embodiment each combustion chamber has two exhaust valves 3 and 4 , by means of which exhaust gas can be discharged into the exhaust tract. The exhaust valves 3 and 4 can be mechanically controlled and actuated by means of a common valve bridge 5 . Valve bridge 5 is part of a connecting mechanism which connects exhaust valves 3 and 4 to a camshaft of internal combustion engine 1 , not shown in the drawing. Furthermore, the connecting mechanism includes a rotatably mounted valve rocker, also not shown together in the figures. The valve rocker acts on the valve bridge 5 via a partially indicated contact pin 6 . For this purpose, the contact pin 6 is equipped at its free end with a ball-and-jo...

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PUM

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Abstract

The internal combustion engine (1) has a combustion chamber, from which exhaust gas is discharged by outlet valves (3,4). An engine brake assembly (2) is provided with a hydraulic valve-auxiliary unit (19), which is integrated in connecting mechanisms (5,6,7) connecting the outlet valves with a camshaft and which hold the outlet valves in an intermediate opened position during operated engine brake assembly. The hydraulic valve-auxiliary unit is connected to an additional oil circuit for feeding.

Description

technical field [0001] The invention relates to an internal combustion engine with at least one combustion chamber from which waste gas can be discharged by means of at least one exhaust valve, comprising an engine braking device with a hydraulic valve auxiliary control unit, which is controlled by Integrated in a connection connecting the exhaust valves to the camshaft, the valve assist control unit holds the exhaust valves in a temporarily open position when the engine brake is actuated. Background technique [0002] Such internal combustion engines are described, for example, in EP0736672B1 and EP1526257A2. The engine braking system of the internal combustion engine is in each case a hybrid of an engine hydrodynamic brake and a pressure reduction brake, which is also known in particular as an EVB (=exhaust valve brake). In the solution according to EP0736672B1, the hydraulic valve auxiliary control unit is integrated into the valve rocker of the connecting mechanism, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/06F01L1/245F02D13/04
CPCF01L13/065F01L1/245F01L1/24F01L13/06
Inventor H·-W·迪利
Owner MAN TRUCK & BUS AG
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