Invention Grant
- Patent Title: Two-step valve lifter control systems and methods
- Patent Title (中): 两级阀门升降机控制系统及方法
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Application No.: US12607381Application Date: 2009-10-28
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Publication No.: US08146567B2Publication Date: 2012-04-03
- Inventor: Scot A. Douglas , Donovan L. Dibble , Joshua D. Cowgill
- Applicant: Scot A. Douglas , Donovan L. Dibble , Joshua D. Cowgill
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Main IPC: F02D13/00
- IPC: F02D13/00 ; F02D13/02

Abstract:
A valve lifter control system includes a valve lifter control module and a forced transition determination module. The valve lifter control module determines a desired lift state of a valve lifter based on at least one of engine speed and engine load. The forced transition determination module initiates a forced transition of the valve lifter from the low-lift state to the high-lift state based on manifold vacuum independently of the desired lift state.
Public/Granted literature
- US20110094465A1 TWO-STEP VALVE LIFTER CONTROL SYSTEMS AND METHODS Public/Granted day:2011-04-28
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