Control system for compression-ignition engine
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United States of America Patent
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Issued Date -
Jun 20, 2019
app pub date -
Nov 13, 2018
filing date -
Dec 15, 2017
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Abstract
A control system for a compression-ignition engine is provided, which includes an engine having a combustion chamber formed by a cylinder, a piston and a cylinder head, an injector, a spark plug, an exhaust gas recirculation (EGR) device configured to introduce into the combustion chamber a portion of burned gas generated inside the combustion chamber as EGR gas, an EGR controller to change an EGR ratio, the EGR controller changing the EGR ratio so that a compression start temperature of the combustion chamber rises as an engine speed increases, and a controller connected to the injector and the spark plug to control them. The controller includes a processor configured to execute a combustion controlling module to output an ignition instruction to the spark plug so as to ignite at an ignition timing after the EGR ratio adjustment so that partial compression-ignition combustion is performed.
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