Internal-combustion engines – Burning by highly compressed air – Oil engine air preheated
Reexamination Certificate
2006-02-28
2006-02-28
Yuen, Henry C. (Department: 3747)
Internal-combustion engines
Burning by highly compressed air
Oil engine air preheated
C123S531000, C123S568140, C123S299000
Reexamination Certificate
active
07004116
ABSTRACT:
The present invention relates to a method of operating a four-stroke internal combustion engine comprising the steps of: closing an exhaust valve prior to the end of the exhaust stroke to trap combusted gases in a combustion chamber; opening an inlet valve during the intake stroke to admit charge into the combustion chamber to be mixed with previously trapped combustion gases; and using an injector to inject fuel into the mixture of the trapped combusted gases and the charge air. In the combustion chamber conditions are generated which enable the mixture of fuel, air and combusted gases to combust by auto-ignition. The injector is additionally used to inject fuel into the trapped combusted gases after closing of the exhaust valve during the exhaust stroke and prior to opening of the inlet valve in the induction stroke.
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Castro Arnold
Fulwider Patton LLP
Lotus Cars Limited
Yuen Henry C.
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