<p>An apparatus and method for operating a plurality of valves in an engine uses valve actuators to move each valve. Accelerometers are used to detect acceleration of the valves and particularly the moment when they seat. A knock sensor detects an acoustic impulse made by the valves when they seat. A controller correlates signals from the sensor and accelerometers, wherein a signal from the sensor that correlates in time with a signal from an accelerometer indicates seating of the respective valve, which indicates a closure of the respective valve. The controller measures a magnitude of the acoustic impulse to be used as feedback in controlling the operation of the respective valve actuator, and provide softer landings of the valve.</p>
申请公布号
WO2006076303(A1)
申请公布日期
2006.07.20
申请号
WO2006US00711
申请日期
2006.01.10
申请人
MOTOROLA, INC.;NABER, JEFFREY D.,;DEUTSCH, ROBERT W.,;FRANKOWSKI, DAVID,;GOBLE, MONROE,;PLEE, STEVEN L.,
发明人
NABER, JEFFREY D.,;DEUTSCH, ROBERT W.,;FRANKOWSKI, DAVID,;GOBLE, MONROE,;PLEE, STEVEN L.,