Invention Grant
- Patent Title: Engine fueling during exit from a deceleration fuel shut-off condition
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Application No.: US15466745Application Date: 2017-03-22
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Publication No.: US10400702B2Publication Date: 2019-09-03
- Inventor: Marc G. Uphues
- Applicant: Ford Global Technologies, LLC
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: McCoy Russell LLP
- Agent Julia Voutyras
- Main IPC: F02D41/30
- IPC: F02D41/30 ; F02B17/00 ; F02D41/12 ; F02D41/24 ; F02D41/26 ; F02D41/40 ; F02P5/15 ; F02D41/14 ; F02D35/02 ; F02P5/04 ; F02D41/38

Abstract:
Methods and systems are provided for fueling an engine of a vehicle during an exit from a deceleration fuel shut-off (DFSO) condition. In one example, a method may include fueling the engine using a compression stroke direct injection during the exit from the DFSO condition to reach a first engine torque threshold, and may further include increasing a separation between the compression stroke direct injection and a spark to gradually increase the engine torque to a second, higher engine torque threshold, and thereafter transitioning engine fueling from the compression stroke direct injection to an intake stroke direct injection. In this way, torque bumps may be reduced during DFSO exit.
Public/Granted literature
- US20180274474A1 METHOD AND SYSTEM FOR AN ENGINE Public/Granted day:2018-09-27
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