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 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 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:
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.