Compression release engine braking systems

Details Compression release engine braking systems Compression release engine braking systems

1993-08-26

1995-05-02

Koczo, Michael

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

F02B 3700

Patent

active

054108829

ABSTRACT:
In a compression release engine braking system for a turbocharged internal combustion engine, excessive stress associated with opening the exhaust valves of the engine near top dead center of engine compression strokes when the engine is turning at high speed is prevented by reducing the intake manifold pressure from what it otherwise would be at that high speed. This is done by retarding the turbocharger so that its speed is less than it otherwise would be at high engine speed. Turbocharger retarding can be accomplished in any of several ways such as by restricting the flow of engine exhaust gas to or from the turbocharger, or by allowing a portion of the exhaust gas to bypass the turbocharger.

REFERENCES:
patent: 3220392 (1965-11-01), Cummins
patent: 4688384 (1987-08-01), Pearman et al.
patent: 4848289 (1989-07-01), Meneely
patent: 4856463 (1989-08-01), Johnston

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