公开(公告)号：US20230203997A1

公开(公告)日：2023-06-29

申请号：US17983953

申请日：2022-11-09

Applicant: KUBOTA Corporation

Inventor： Michisuke IGA ,  Kazuhiro TANAKA ,  Masanori HIROCHI ,  Yoshinori OYAMA

IPC: F02D9/08 ,  F02D13/02

CPC classification number: F02D9/08 ,  F02D13/0234

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.