Invention Grant
- Patent Title: Method for controlling camshaft orientation for improved engine re-starting of an engine having start-stop capability
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Application No.: US17319185Application Date: 2021-05-13
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Publication No.: US11643950B2Publication Date: 2023-05-09
- Inventor: Andrew Morris , Jiju Alexander , Daniel Brown
- Applicant: BorgWarner Inc.
- Applicant Address: US MI Auburn Hills
- Assignee: BorgWarner Inc.
- Current Assignee: BorgWarner Inc.
- Current Assignee Address: US MI Auburn Hills
- Agency: Reising Ethington P.C.
- Main IPC: F01L9/20
- IPC: F01L9/20 ; F01L1/344 ; F02D13/08 ; F01L1/352

Abstract:
A method includes determining a value of an operational motor current limit and setting a value of a startup current limit equal to a predetermined value in excess of the value of the operational motor current limit if a set of predetermined conditions is satisfied. The method includes determining that operation of the engine has been interrupted, operating the electric motor of the variable valve timing mechanism with a current having a magnitude that is less than or equal to the startup current limit after determining that operation of the engine has been interrupted, determining that operation of the engine has resumed, and operating the electric motor of the variable valve timing mechanism with a current having a magnitude that is less than or equal to the operational motor current limit after determining that operation of the engine has resumed.
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