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US 6,293,246 B1Granted
Spark-assist type self-ignition engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsToshio Tanahashi, Toshimi Murai, Yushiro Yasuda, Toshiaki Asada
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Abstract
An engine comprising a spark plug and a fuel injector in a combustion chamber and a temperature sensor used to judge if the gas temperature in the combustion chamber is a temperature at which self-ignition occurs when a spark is generated. Based on this judgement, a valve timing device is used to control the opening timing of the intake valve and maintain the gas temperature at a temperature at which self-ignition occurs when a spark is generated.
Claims19
A spark-assist type self-ignition engine comprising:
- a combustion chamber;
- a spark plug arranged in the combustion chamber;
- judging means for judging if a gas temperature in the combustion chamber at the end of a compression stroke is a target temperature or within a target temperature range at which substantially simultaneous ignition of an entire air-fuel mixture is caused when a spark is generated;
- and
- control means for controlling the gas temperature in the combustion chamber at the end of the compression stroke to the target temperature range based on the results of judgement of the judging means.
2 more elements
Dependencies are inferred from the claim text.