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Exhaust braking device for a 4-stroke internal piston combustion engine

A technology of engine braking and braking devices, which is applied in the direction of engine control, machine/engine, engine components, etc., to achieve the effect of high engine braking power

Inactive Publication Date: 2005-04-27
MAN TRUCK & BUS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no solution proposal for engines with more than two valves

Method used

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  • Exhaust braking device for a 4-stroke internal piston combustion engine
  • Exhaust braking device for a 4-stroke internal piston combustion engine
  • Exhaust braking device for a 4-stroke internal piston combustion engine

Examples

Experimental program
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Embodiment Construction

[0019] Figure 1 shows a 4-stroke piston internal combustion engine in section, each cylinder 1 has at least one intake valve (not shown) and two exhaust valves 2, 3. 4, 5, 6, 7 represent the structure of the cylinder 1 respectively Space, the piston that does work in the cylinder, the cylinder head and the cylinder head. The exhaust duct 8 of the cylinder 1 opens into one or more exhaust manifolds and together with the latter forms part of the exhaust duct 9 . In the exhaust duct 9, a throttle device 10 is inserted as close as possible to the engine. This device is formed, for example, by a throttle valve or mushroom valve or distribution valve. Throttle is used most of the time. Throttle device 10, including its control and / or regulating mechanism (described in detail later), forms part of an engine braking device according to the invention for at least partially shutting off the exhaust gas duct during engine braking and blocking thereby The exhaust gas caused by upstream...

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PUM

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Abstract

The purpose of this invention is to automatically perform predetermined open or close of an exhaust valve and to provide high engine brake power, by improving an engine control braking device of a 4-stroke internal piston combustion engine equipped with one intake valve and two exhaust valves 2 and 3 for each cylinder. A throttle device 10 for operating an engine brake is incorporated in an exhaust gas duct 9 so that the exhaust gas resistant pressure cooperating with a braking device 11 in an engine is formed in exhaust gas dammed up in the upstream of the throttle device. The braking device 11 is disposed in one exhaust valve 2 of the exhaust valves 2 and 3, and the other 3 is controlled conventionally. The braking device 10 has a control piston 30 incorporated in a valve bridge 20 pressed toward the exhaust valve 2 from a control pressure chamber 33 loaded by oil pressure. The control pressure chamber 33 is connected to a permanent pressure oil supply section, and is cut off and pressure-released via a pressure releasing passage 37 in relation to a motion or position of the valve bridge 20.

Description

technical field [0001] The invention relates to an engine barrier brake for a 4-stroke piston internal combustion engine with the features according to the preamble of claim 1 . Background technique [0002] The present invention proceeds from EP 0736672 B1. This patent discloses a method for engine braking of a 4-stroke piston internal combustion engine with an engine-internal braking device assigned to the exhaust valves. The associated exhaust valves can be actuated via a valve rocker arm directly or indirectly via an actuatable tappet. It is disclosed that parts of the braking device are integrated either in the area of ​​the valve rocker arm or in the area of ​​the tappet. But do not propose solution proposal to the engine of more than two valves. Contents of the invention [0003] Therefore, the object of the present invention is to provide a kind of engine barrier braking device of a 4-stroke internal combustion engine with at least one intake valve and two exhau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N5/04F01L1/26F01L13/06F01N13/08F02D9/06F02D13/02
CPCF01L1/26F01L1/181F01L2820/02F01L13/065F01L1/146
Inventor F·拉默G·拉亚布F·莱滕迈尔
Owner MAN TRUCK & BUS AG
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