摘要:
A method includes the steps of: detecting "starter O N" by IG-SW signal (step S12); calculating an moving average value T CRKAVE of crank pulse intervals (steps S13-S1 7 ); determining engine starting when the T CRKAVE is less than or equal to a threshold value T th (step S19); and controlling a vibration isolating support unit M based on a natural vibration frequency of the engine when engine starting is determined (steps S20-S22).
摘要:
A solenoid driving device with excellent electric power efficiency which drives and controls an actuator including a solenoid and an active vibration isolating support device with excellent electric power efficiency which includes the solenoid driving device are disclosed. The solenoid driving device includes a booster circuit 120 which boosts a battery voltage, and driving circuits 121A, 121B which an actuator with the electric power supplied and boosted by the booster circuit 120. ACM_ECU200A including a micro computer 200b calculates the magnitude of the vibration of the engine, an engine vibration cycle and a phase lag to obtain the drive frequency f DV of the actuator in the vibration state estimating unit 234 and the phase detecting unit 235. A booster circuit controlling unit 237 of the micro computer 200b determines the target voltage V*based on the drive frequency f DV . The target voltage V* is input to the booster circuit 120, and the booster circuit120 supplies the required electric power to the driving circuits 121A, 121B at the target voltage V*.
摘要:
A method includes the steps of: detecting "starter O N" by IG-SW signal (step S12); calculating an moving average value T CRKAVE of crank pulse intervals (steps S13-S17); determining engine starting when the T CRKAVE is less than or equal to a threshold value T th (step S19); and controlling a vibration isolating support unit M based on a natural vibration frequency of the engine when engine starting is determined (steps S20-S22).
摘要:
The natural vibration frequency of a roll resonance which does not occur since the engine rotation number is high in a normal operation range of an engine is detected at the time of engine start or stop when the engine rotation number is lower than the normal operation range, and thus the natural vibration frequency of the roll resonance can be detected with a good accuracy. A current is generated by an electromotive force of an actuator of the active vibration isolation support device excited by the engine immediately before stopping its rotation, and the frequency of the current is used to detect the natural vibration frequency of the engine, and the roll resonance of the engine is suppressed by controlling the operation of the active vibration isolation support device at the time of engine start based on the natural vibration frequency, thereby not only eliminating the need of a specific frequency detection sensor, but also effectively reducing the vibration at the time of engine start when the roll resonance becomes strong.
摘要:
Active vibration isolating support apparatus for reducing a transient vibration which occurs at the time of engine starting including a vibration isolating support unit to elastically support the engine in a vehicle body each of which includes an actuator and a control unit to estimate a vibrational state based on an output from a sensor for detecting a change in a revolution speed of the engine, the control unit driving the actuator to extend and contract so as to reduce transmission of vibration, and in which the control unit determines a detection of an initial explosion in the engine and drives the actuator of the vibration isolating support unit to extend and contract at a predetermined frequency if the estimated change rate in the revolution speed of the engine based on the output from the sensor is greater than or equal to a predetermined value after a time when engine starts. Further included is a method for controlling the active vibration isolating support apparatus.
摘要:
A method includes the steps of: detecting "starter O N" by IG-SW signal (step S12); calculating an moving average value T CRKAVE of crank pulse intervals (steps S13-S1 7 ); determining engine starting when the T CRKAVE is less than or equal to a threshold value T th (step S19); and controlling a vibration isolating support unit M based on a natural vibration frequency of the engine when engine starting is determined (steps S20-S22).