Invention Grant
- Patent Title: Determining firing density of a skip fire controlled lean-burn engine using air-fuel ratio and exhaust temperatures
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Application No.: US16373364Application Date: 2019-04-02
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Publication No.: US10823029B2Publication Date: 2020-11-03
- Inventor: Shikui Kevin Chen , Matthew A. Younkins
- Applicant: Tula Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Tula Technology, Inc.
- Current Assignee: Tula Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Beyer Law Group LLP
- Main IPC: F01N3/08
- IPC: F01N3/08 ; F01N3/20 ; F02D41/00 ; F01N11/00 ; F01N3/021 ; F02D41/40 ; F01N13/00 ; F02D41/14 ; F02D13/06 ; F02D41/02
Abstract:
A skip fire control that relies on a combination of a torque request, exhaust temperature, and air-fuel ratio in determining firing density is described. Also, skipped firing opportunities may either pump or not pump air into an exhaust system, allowing an exhaust gas temperature in the exhaust system to be controlled or modulated. The present invention is also related to Dynamic Skip Fire (DSF), where a decision to either fire or skip cylinders is made every firing opportunity.
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