Sprung mass damping control system of vehicle, and vehicle provided with said system

• US 8,626,388 B2
• Filed: 05/11/2010
• Issued: 01/07/2014
• Est. Priority Date: 05/13/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Oikawa, Yoshitaka
• Primary Examiner(s): Trammell, James
• Assistant Examiner(s): ALSOMIRI, MAJDI A
• Application Number:
  US13/319,204
• Publication Number:
  US 20120053790A1
• Time in Patent Office: 1,337 Days
• Field of Search: 701/37, 701/70, 701/103, 701/104, 267/140.14, 267/160, 188/378
• US Class Current: 701/37
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 2240/423 Torque
• 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 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 2710/22 Suspension systems
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A sprung mass damping control system of a vehicle, which suppresses sprung mass vibration generated in a vehicle body by adjusting a driving control amount of a drive source (the second motor-generator), includes a spring vibration control amount calculating device that sets a sprung mass damping control amount for suppressing the sprung mass vibration, a drive source control device (a motor-generator control device) that executes sprung mass damping control by controlling the driving control amount of the drive source to realize the sprung mass damping control amount, and a sprung mass damping control amount adjusting apparatus (a sprung mass damping control amount responsiveness compensating portion) that adjusts the phase of a sprung mass damping control signal related to the sprung mass damping control amount according to the situation. A vehicle is provided with this sprung mass damping control system.

Claims

1. A sprung mass damping control system of a vehicle, which suppresses sprung mass vibration generated in a vehicle body by adjusting a driving control amount of a drive source, comprising:

a spring vibration control amount calculating device that sets a sprung mass damping control amount for suppressing the sprung mass vibration;

a drive source control device that executes sprung mass damping control by controlling the driving control amount of the drive source to realize the sprung mass damping control amount; and

a sprung mass damping control amount adjusting apparatus that adjusts the phase of a sprung mass damping control signal related to the sprung mass damping control amount according to the situation,

wherein the drive source control device executes sprung mass damping control by controlling a motor-generator control amount of a motor-generator that is driven by a waveform signal, or a motor control amount of a motor or a generator capable of operating as a motor that is driven by the waveform signal, and the sprung mass damping control amount adjusting apparatus adjusts the phase of the sprung mass damping control signal related to the sprung mass damping control amount according to the waveform signal, and

the phase of the waveform signal is shifted when the responsiveness of at least one of the drive source or a driving control amount transmitting apparatus that transmits a driving control amount output from the drive source to a driving wheel decreases.

2. The sprung mass damping control system according to claim 1, wherein the drive source control device executes sprung mass damping control by controlling a motor-generator control amount of a motor-generator, the waveform signal modulation method of which is able to be switched, or a motor control amount of a motor or a generator capable of operating as a motor, the waveform signal modulation method of which is able to be switched, and the sprung mass damping control amount adjusting apparatus adjusts the phase of the sprung mass damping control signal related to the sprung mass damping control amount according to the modulation method.

3. The sprung mass damping control system according to claim 2, wherein the sprung mass damping control amount adjusting apparatus reduces the sprung mass damping control amount when the modulation method is an overmodulation PWM control method and the frequency of the sprung mass damping control signal according to the sprung mass damping control amount is within the predetermined range.

4. The sprung mass damping control system according to claim 1, wherein the drive source control device executes sprung mass damping control by controlling a motor-generator control amount of a motor-generator, the waveform signal modulation method of which is able to be switched, or a motor control amount of a motor or a generator capable of operating as a motor, the waveform signal modulation method of which is able to be switched, and the sprung mass damping control amount adjusting apparatus adjusts the sprung mass damping control amount when the frequency of the sprung mass damping control signal according to the sprung mass damping control amount is within a predetermined range.

5. A method of performing a sprung mass damping control in a vehicle, comprising:

superimposing a waveform signal, based on fluctuation in wheel speed due to bumps and dips in a road surface, over a driving control amount of a drive source using a control unit;

outputting the driving control amount of the drive source to a driving wheel using a driving control amount transmitting apparatus;

suppressing at least the fluctuation in wheel speed; and

shifting the phase of the waveform signal when the responsiveness of at least one of the drive source or a driving control amount apparatus that transmits the driving control amount from the drive source to the driving wheel decreases.