VEHICLE VIBRATION REDUCING APPARATUS

• US 20140366682A1
• Filed: 01/20/2012
• Published: 12/18/2014
• Est. Priority Date: 01/20/2012
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Murata, Kiyohito
• Granted Patent: US 9,746,051 B2
• Time in Patent Office: Days
• US Class Current: 74/572.2
• CPC Class Codes: B60K 6/105 the accumulator being a flywheel
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 2030/206 related or induced by the engine
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: B60Y 2400/48 Vibration dampers, e.g. dual mass flywheels
• CPC Class Codes: F16F 15/1464 Masses connected to driveline by a kinematic mechanism or gear system F16F15/145 takes precedence
• CPC Class Codes: F16F 15/1478 with a planetary gear system
• CPC Class Codes: F16F 15/30 Flywheels F16F15/16, F16F15/28 take precedence; suppression of vibrations in rotating systems using elastic members or friction-damping members moving with the system, i.e. split flywheels or single masses connected to a hub by elastic members or friction-damping members F16F15/12; rotary-body aspects in general F16C13/00, F16C15/00
• CPC Class Codes: F16F 15/31 characterised by means for varying the moment of inertia
• CPC Class Codes: F16H 57/0006 Vibration-damping or noise reducing means specially adapted for gearings devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183
• CPC Class Codes: Y10T 74/2121 Flywheel, motion smoothing-type

Abstract

A vehicle vibration reducing apparatus (1) includes: an inertial mass body (30); a first engagement device (41) that is switched between a state where a running power source (4) engages with a damper (6) of a power transmission device (5) so as to enable power transmission and a state where the engagement is released; a second engagement device (42) that is switched between a state where the power transmission device (5) engages with the inertial mass body (30) so as to enable power transmission in a power transmission pass different from that of the first engagement device (41) and a state where the engagement is released; and a third engagement device (43) that is switched between a state where the running power source (4) engages with the inertial mass body (30) so as to enable power transmission in a power transmission path different from those of the first engagement device (41) and the second engagement device (42) and a state where the engagement is released. Accordingly, the vehicle vibration reducing apparatus (1) can achieve an effect of properly reducing vibration.

Claims

1. A vibration reducing apparatus for a vehicle, the vehicle having a running power source generating rotational power for causing the vehicle to run, a driving wheel, and a power transmission device transmitting the rotational power to the driving wheel via a damper from the running power source, the vibration reducing apparatus comprising:

an inertial mass body that is connected to the running power source or the power transmission device;

a first engagement device configured to switch between a state where the running power source engages with the damper of the power transmission device so as to enable power transmission between the running power source and the damper and a state where the engagement of the running power source and the damper is released;

a second engagement device configured to switch between a state where the power transmission device engages with the inertial mass body so as to enable power transmission between the power transmission device and the inertial mass body in a power transmission pass different from that of the first engagement device and a state where the engagement of the power transmission device and the inertial mass body is released; and

a third engagement device configured to switch between a state where the running power source engages with the inertial mass body so as to enable power transmission between the running power source and the inertial mass body in a power transmission path different from those of the first engagement device and the second engagement device and a state where the engagement of the running power source and the inertial mass body is released.

2. The vibration reducing apparatus according to claim 1, wherein

the power transmission device includes a transmission that changes the rotational power transmitted from the running power source to the driving wheel,

the first engagement device, the second engagement device, and the third engagement device are arranged to be coaxial with a rotation axis line of an input shaft of the transmission, and

the second engagement device is configured to switch between a state where the input shaft of the transmission engages with the inertial mass body so as to enable power transmission between the input shaft of the transmission and the inertial mass body and a state where the engagement of the input shaft of the transmission and the inertial mass body is released.

3. The vehicle vibration reducing apparatus according to claim 1, further comprising a first control device that controls the first engagement device, the second engagement device, and the third engagement device, wherein

the running power source is an internal combustion engine, and

when the running power source is in an idling operation state, the first control device is configured to control the first engagement device and the second engagement device so as to be switched to the disengaged state of the first engagement device and the second engagement device, and control the third engagement device so as to be switched to the engaged state of the third engagement device.

4. The vibration reducing apparatus according to claim 3, wherein

when the vehicle is in a starting condition, the first control device is configured to control the first engagement device and the second engagement device being in the disengaged state and the third engagement device being in the engaged state.

5. The vehicle vibration reducing apparatus according to claim 3,

after the first engagement device and the second engagement device being in the disengaged state and the third engagement device being in the engaged state when the vehicle starts moving, the first control device is configured to control the first engagement device so as to be switched to the engaged state, and

after the engagement of the first engagement device is completed, the first control device is configured to control the third engagement device so as to be switched to the disengaged state of the third engagement device and control the second engagement device so as to be switched to the engaged state of the second engagement device.

6. The vehicle vibration reducing apparatus according to claim 3, wherein

the power transmission device includes a fluid transmission mechanism that transmits the rotational power via a fluid, and

after the first engagement device and the second engagement device being in the disengaged state and the third engagement device being in the engaged state when the vehicle starts moving, the first control device is configured to control the third engagement device so as to be switched to the disengaged state of the third engagement device and to control the second engagement device so as to be switched to the engaged state of the second engagement device after a rotation speed of the inertial mass body side of the second engagement device is synchronized with a rotation speed of the power transmission device side of the second engagement device, and

after the disengagement of the third engagement device and the engagement of the second engagement device are completed, the first control device is configured to control the first engagement device so as to be switched to the engaged state of the first engagement device.

7. The vibration reducing apparatus according to claim 1, wherein

the inertial mass body is able to accumulate the transmitted rotational power as inertial energy.

8. The vibration reducing apparatus according to claim 1, further comprising:

a rotation adjusting device that adjusts rotation of the inertial mass body; and

a second control device that controls the rotation adjusting device so as to adjust the rotation of the inertial mass body on the basis of an output of the running power source.

9. The vehicle vibration reducing apparatus according to claim 8, wherein

the second control device controls the rotation adjusting device so as to accumulate surplus power to power used for the running of the vehicle out of power generated by the running power source in the inertial mass body.

10. The vibration reducing apparatus according to claim 8, wherein

the second control device controls the rotation adjusting device so as to discharge deficient power in power used for the running of the vehicle out of power generated by the running power source from the inertial mass body.

11. The vibration reducing apparatus according to claim 1, wherein

the first engagement device is a lockup clutch of a fluid transmission mechanism that transmits the rotational power via a fluid.