Apparatus and method for retarding an engine
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United States of America Patent
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Jul 18, 1989
Grant Date -
N/A
app pub date -
May 2, 1988
filing date -
May 2, 1988
priority date (Note) -
Expired
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Abstract
The invention includes an apparatus for retarding an engine. There is a mechanism, such as a master and slave cylinder arrangement, for cracking open each exhaust valve of each cylinder of the engine near top dead center of each compression stroke. There is also provision for increasing the pressure of gases in the exhaust manifold sufficiently to open exhaust valves of other cylinders on the intake stroke after each exhaust valve on the compression stroke is so opened. The provision for increasing the pressure of gases in the exhaust manifold may include retarding timing of the cracking open of the exhaust valves on the compression stroke and a valve or other device for restricting a flow of exhaust gases from the exhaust manifold.
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