Invention Grant
US08631782B2 Active compression ratio modulation through intake valve phasing and knock sensor feedback
有权
通过进气门相位和爆震传感器反馈进行主动压缩比调制
- Patent Title: Active compression ratio modulation through intake valve phasing and knock sensor feedback
- Patent Title (中): 通过进气门相位和爆震传感器反馈进行主动压缩比调制
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Application No.: US12196572Application Date: 2008-08-22
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Publication No.: US08631782B2Publication Date: 2014-01-21
- Inventor: James Donald Smith , Paul M. Najt
- Applicant: James Donald Smith , Paul M. Najt
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: F01L1/34
- IPC: F01L1/34 ; F02P5/00
Abstract:
An internal combustion engine includes a piston reciprocable within a cylinder, a phase controllable valvetrain configured to alter the effective compression ratio of the engine, and a knock sensor. A method for controlling the engine includes controlling the valvetrain to a first effective compression ratio whereat knock is detectable by the knock sensor and thereafter controlling the valvetrain to reduce the effective compression ratio to a point whereat knock is no longer detectable.
Public/Granted literature
- US20100049420A1 ACTIVE COMPRESSION RATIO MODULATION THROUGH INTAKE VALVE PHASING AND KNOCK SENSOR FEEDBACK Public/Granted day:2010-02-25
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