Invention Grant
- Patent Title: Variable valve operation control method and apparatus
- Patent Title (中): 变阀操作控制方法及装置
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Application No.: US13653778Application Date: 2012-10-17
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Publication No.: US09574468B2Publication Date: 2017-02-21
- Inventor: Dante T. Boutell
- Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
- Applicant Address: US KY Erlanger
- Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
- Current Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
- Current Assignee Address: US KY Erlanger
- Agency: Darrow Mustafa PC
- Agent Christopher G. Darrow
- Main IPC: F01L1/34
- IPC: F01L1/34 ; F01L13/00

Abstract:
A control method and apparatus for a variable engine valve operating control mechanisms which move the engine valves to a safe lift/timing position with respect to a piston to minimize the potential for valve to piston contact during valve surge. At least one engine operating conditions is selected and provided with a threshold triggering a control to move the valves to a safe position in a calibrated, predictive manner in advance of any potential valve to piston contact. The control method and apparatus can be integrated into the existing engine control and variable valve operating control mechanism.
Public/Granted literature
- US20140102385A1 Variable Valve Operation Control Method and Apparatus Public/Granted day:2014-04-17
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