Spark ignition type engine
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United States of America Patent
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-
Sep 26, 2023
Grant Date -
Jun 29, 2023
app pub date -
Nov 9, 2022
filing date -
Dec 24, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A spark ignition type engine enabling engine startability to be favorable is provided. The spark ignition type engine includes a main intake-air passage; a throttle valve of the main intake-air passage; a bypass intake-air passage bypassing the throttle valve; an ISC valve of the bypass intake-air passage; and an electronic control device that controls an engine speed by adjusting an opening degree of the ISC valve, in which when the engine is started, cranking is performed at a cranking opening degree at which the ISC valve is narrowed by a predetermined amount from a fully opened state by control of the electronic control device, so that an intake-air negative pressure is generated on an intake-air downstream side of the ISC valve.
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