Active vibration isolating support apparatus and method for controlling the same
First Claim
Patent Images
1. An active vibration isolating support apparatus for reducing an engine vibration transmitted from an engine comprising:
- front and rear vibration isolating support units disposed ahead of and behind the engine respectively to elastically support the engine in a vehicle body, each of which comprises an actuator; and
a control unit to estimate a vibration;
wherein the control unit drives the actuators to extend and contract so as to reduce transmission of the estimated vibration,wherein the control unit;
receives a TDC pulse signal to exhibit timing of a top dead center for each cylinder, and a crank pulse signal;
determines a detection of a starting of the engine;
sets a phase delay which delays a phase by a predetermined time difference from a timing at which it is determined that an initial explosion occurs to start the engine based on the TDC pulse signal and the crank pulse signal;
determines a first selected unit from the front vibration isolating support unit and the rear vibration isolating support unit, to drive the actuator thereof to extend and contract;
starts control of the first selected vibration isolating support unit with the set phase delay while maintaining the other vibration isolating support unit in an inactive state; and
starts the actuator of the first selected vibration isolating support unit to extend and contract at a natural roll vibration frequency of the engine vibration, which is determined by the engine and the vibration isolating support unit, with a phase delay which is set at a timing when the starting of the engine is determined.
1 Assignment
0 Petitions
Accused Products
Abstract
A method includes the steps of: detecting “starter ON” by IG-SW signal (step S12); calculating an moving average value TCRKAVE of crank pulse intervals (steps S13-S17); determining engine starting when the TCRKAVE is less than or equal to a threshold value Tth (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).
18 Citations
17 Claims
-
1. An active vibration isolating support apparatus for reducing an engine vibration transmitted from an engine comprising:
-
front and rear vibration isolating support units disposed ahead of and behind the engine respectively to elastically support the engine in a vehicle body, each of which comprises an actuator; and a control unit to estimate a vibration; wherein the control unit drives the actuators to extend and contract so as to reduce transmission of the estimated vibration, wherein the control unit; receives a TDC pulse signal to exhibit timing of a top dead center for each cylinder, and a crank pulse signal; determines a detection of a starting of the engine; sets a phase delay which delays a phase by a predetermined time difference from a timing at which it is determined that an initial explosion occurs to start the engine based on the TDC pulse signal and the crank pulse signal; determines a first selected unit from the front vibration isolating support unit and the rear vibration isolating support unit, to drive the actuator thereof to extend and contract; starts control of the first selected vibration isolating support unit with the set phase delay while maintaining the other vibration isolating support unit in an inactive state; and starts the actuator of the first selected vibration isolating support unit to extend and contract at a natural roll vibration frequency of the engine vibration, which is determined by the engine and the vibration isolating support unit, with a phase delay which is set at a timing when the starting of the engine is determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for controlling a vibration isolating support apparatus, said vibration isolating support apparatus comprising front and rear vibration isolating support units disposed ahead of and behind the engine respectively, to elastically support an engine in a vehicle body, each of said front and rear vibration isolating support units comprising an actuator;
- said method comprising the steps of;
receiving a TDC pulse signal to exhibit timing of a top dead center for each cylinder, and a crank pulse signal; determining a detection of a starting of the engine; setting a phase delay which delays a phase by a predetermined time difference from a timing at which it is determined that an initial explosion occurs to start the engine based on the TDC pulse signal and the crank pulse signal; determining a first selected unit from the front vibration isolating support unit and the rear vibration isolating support unit, to drive the actuator thereof to extend and contract; starting control of the first selected vibration isolating support unit with the set phase delay while maintaining the other vibration isolating support unit in an inactive state; and starting the actuator of the first selected vibration isolating support unit to extend and contract at a natural roll vibration frequency determined by the engine and the vibration isolating support unit. - View Dependent Claims (14, 15)
- said method comprising the steps of;
-
16. An active vibration isolating support apparatus for reducing an engine vibration transmitted from an engine, said vibration isolating support apparatus comprising:
-
a plurality of vibration isolating support units configured to elastically support the engine in a vehicle body, each of which comprises an actuator; and a control unit which estimates a vibration of the engine; wherein the control unit further; drives the actuators to extend and contract so as to reduce transmission of the estimated vibration, determines an initial engine start time; and determines an engine idle mode start time; and wherein; said vibration isolating support units are tuned to passively damp oscillations at a first frequency during a first period when the starter is driving the engine, without requiring input from the control unit; said control unit controls the actuators to extend and contract at a second frequency during a second period starting at the initial engine start time and ending at the idle mode start time, said second frequency being fixed and determined based on characteristics of the engine and the vibration isolating support unit, with a phase shifted from the engine vibration, said phase determined at the initial engine start time. - View Dependent Claims (17)
-
Specification