Invention Grant
- Patent Title: Method and system for control of an EGR valve during lean operation in a boosted engine system
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Application No.: US14752289Application Date: 2015-06-26
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Publication No.: US09683500B2Publication Date: 2017-06-20
- Inventor: Gopichandra Surnilla , Todd Anthony Rumpsa , James Alfred Hilditch , Timothy Joseph Clark , Ralph Wayne Cunningham , Julia Helen Buckland , Daniel Joseph Styles
- 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: F02D41/00
- IPC: F02D41/00 ; F02D41/14 ; F02M26/06 ; F02D13/02 ; F02M35/10 ; F02M26/05
Abstract:
Methods and systems are provided for reducing EGR estimation errors during lean engine operating conditions. During lean engine operation, EGR is disabled if the estimated exhaust air-fuel ratio becomes leaner than a lean threshold. The lean threshold is adjusted based on an upper limit of EGR errors that may be tolerated by the engine at a given engine speed and load.
Public/Granted literature
- US20150292424A1 METHOD AND SYSTEM FOR CONTROL OF AN EGR VALVE DURING LEAN OPERATION IN A BOOSTED ENGINE SYSTEM Public/Granted day:2015-10-15
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