Vehicle body vibration control device for vehicle

• US 9,199,523 B2
• Filed: 11/26/2014
• Issued: 12/01/2015
• Est. Priority Date: 11/29/2013
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Saito, Takashi
• Primary Examiner(s): Tarcza, Thomas
• Assistant Examiner(s): Dunn, Alex C
• Application Number:
  US14/554,171
• Publication Number:
  US 20150153748A1
• Time in Patent Office: 370 Days
• Field of Search: 701/37
• US Class Current: 1/1
• CPC Class Codes: B60G 17/0182 involving parameter estimation, e.g. observer, Kalman filter
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/22 including control of suspension systems
• CPC Class Codes: B60W 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2030/206 related or induced by the engine
• CPC Class Codes: B60W 2050/0054 Cut-off filters, retarders, delaying means, dead zones, threshold values or cut-off frequency
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 50/10 Interpretation of driver requests or demands
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2041/1422 Variable gain or coefficients
• CPC Class Codes: F02D 2041/1432 the system including a filter, e.g. a low pass or high pass filter
• CPC Class Codes: F02D 2041/288 for performing a transformation into the frequency domain, e.g. Fourier transformation
• CPC Class Codes: F02D 2200/101 Engine speed
• CPC Class Codes: F02D 2200/501 Vehicle speed
• CPC Class Codes: F02D 2200/602 Pedal position
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 2250/28 : Control for reducing torsional vibrations, e.g. at acceleration
• CPC Class Codes: F02D 41/10 : for acceleration
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles

Abstract

Provided is a vehicle body vibration control device (10) for a vehicle, including a request driving force calculation unit (20) calculating a driver'"'"'s request driving force, a driving unit (16) applying a driving force to the vehicle (12), a driving force control unit (22) controlling the driving unit based on command driving force, and a notch filter (24) receiving a signal indicating the request driving force, processing the signal so as to reduce a frequency component of vibration of a vehicle body, and outputting the processed signal to the driving force control unit as a command driving force signal. The control device (10) further includes a correction unit (30) correcting, when there is no need to correct the command driving force to a value reduced in effect of the filter processing, the notch filter so as to use a current value as data subjected to the filter processing.

Claims

1. A vehicle body vibration control device for a vehicle, comprising:

a request driving force calculation unit configured to calculate a request driving force of a driver;

a driving unit configured to apply a driving force to the vehicle;

a driving force control unit configured to control said driving unit based on a command driving force; and

a notch filter configured to receive a signal indicating the request driving force from said request driving force calculation unit, subject the signal to filter processing, and to output the signal, which has been subjected to the filter processing, to said driving force control unit as a signal indicating the command driving force, the notch filter having a notch frequency set to a value for reducing a frequency component of vibration of a vehicle body,

wherein said notch filter calculates the command driving force at every predetermined time interval based on a past request driving force, a current request driving force, and a past command driving force,

wherein said vehicle body vibration control device further comprises a determination unit configured to determine whether or not there is a need to correct the command driving force to a value reduced in effect of said filter processing, and a command driving force correction unit configured to correct, when said determination unit determines that there is a need to correct the command driving force, the command driving force to the value reduced in effect of said filter processing, and

wherein said command driving force correction unit corrects, when said determination unit determines that there is no more need to correct the command driving force, in calculation of a command driving force executed immediately after the determination, said notch filter so as to calculate the command driving force by using the current request driving force in place of the past request driving force and the past command driving force.

3. A vehicle body vibration control device for a vehicle according to claim 1, wherein said determination unit determines, when the driving force applied to the vehicle changes in stages during the correction of the command driving force, that there is no more need to correct the command driving force.

2. A vehicle body vibration control device for a vehicle, comprising:

a request driving force calculation unit configured to calculate a request driving force of a driver;

a driving unit configured to apply a driving force to the vehicle;

a driving force control unit configured to control said driving unit based on a command driving force; and

a notch filter configured to receive a signal indicating the request driving force from said request driving force calculation unit, subject the signal to filter processing, and to output the signal which has been subjected to the filter processing, to said driving force control unit as a signal indicating the command driving force, said notch filter having a notch frequency set to a value for reducing a frequency component of vibration of a vehicle body,

wherein said notch filter calculates the command driving force at every predetermined time interval based on a past request driving force, a current request driving force, and a past command driving force,

wherein said vehicle body vibration control device further comprises a determination unit configured to determine whether or not there is a need to correct the command driving force to a value reduced in effect of the filter processing, and a command driving force correction unit configured to correct, when said determination unit determines that there is a need to correct the command driving force, the command driving force to the value reduced in effect of said filter processing, and

wherein said command driving force correction unit corrects, when said determination unit determines that there is a need to correct the command driving force, said notch filter so as to calculate the command driving force by using the current request driving force in place of the past request driving force and the past command driving force.

4. A vehicle body vibration control device for a vehicle according to claim 2, wherein said determination unit determines, under a state in which the correction of the command driving force is not executed, that there is a need to correct the command driving force in any one of cases in which said driving unit applies no driving force to the vehicle and in which driving force limitation control for limiting the driving force applied to the vehicle is executed even when the driver performs an operation to increase the driving force.