DRIVING FORCE CONTROL DEVICE FOR SADDLED VEHICLE

• US 20190111906A1
• Filed: 02/22/2017
• Published: 04/18/2019
• Est. Priority Date: 03/29/2016
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: TETSUKA, Takashi, SAKAMOTO, Naoki, YOKOGAWA, Yukio, MISAWA, Shinji
• Granted Patent: US 10,569,756 B2
• Time in Patent Office: Days
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/113 with two input flow paths, e.g. double clutch transmission selection of one of the torque flow paths by the corresponding input clutch
• CPC Class Codes: B60W 2300/36 Cycles; Motorcycles; Scooters
• CPC Class Codes: B60W 2520/16 Pitch
• CPC Class Codes: B60W 2520/28 Wheel speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2710/023 Clutch engagement rate
• CPC Class Codes: B60W 2710/0677 Engine power
• CPC Class Codes: B60W 30/18036 Reversing
• CPC Class Codes: B60W 30/18063 Creeping
• CPC Class Codes: B60W 30/18118 Hill holding
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: B60Y 2200/12 Motorcycles, Trikes; Quads; Scooters
• CPC Class Codes: F16D 48/02 Control by fluid pressure
• CPC Class Codes: F16H 59/66 Road conditions, e.g. slope, slippery
• CPC Class Codes: F16H 61/688 with two inputs, e.g. selection of one of two torque-flow paths by clutches

Abstract

A driving force control device for saddled vehicle includes a transmission that transmits driving force of an engine to a driving wheel of a vehicle at predetermined reduction ratio; a clutch that connects/disconnects the driving force between the engine and the transmission; and a controller that controls the transmission and the clutch. The controller permits selection of a normal mode in which the reduction ratio of the transmission is varied according to a running condition and a slow mode permitting slow forward movement and slow backward movement by varying the reduction ratio of the transmission to a fixed reduction ratio according to predetermined operation, and the controller holds the clutch in a partial clutch engagement condition so as to prevent the vehicle from moving forward or backward when the slow mode is selected and no predetermined operation is performed.

Claims

1. A driving force control device for saddled vehicle, comprising:

a transmission that transmits driving force of an engine to a driving wheel of a vehicle at predetermined reduction ratio;

a clutch that connects/disconnects the driving force between the engine and the transmission; and

a controller that controls the transmission and the clutch,

wherein the controller is configured to enable selecting a normal mode in which the reduction ratio of the transmission is varied according to a running condition and a slow mode for enabling slow forward movement and slow backward movement by varying the reduction ratio of the transmission to fixed reduction ratio according to predetermined operation,

the controller holds the clutch in a partial clutch engagement condition so as to prevent the vehicle from moving forward or backward when the slow mode is selected and no predetermined operation is performed, and

the clutch is a dual clutch including a first clutch engaged in the slow backward movement and a second clutch engaged in the slow forward movement,

means for detecting an inclination in a pitching direction of the vehicle is provided,

in a case of an up-slope, the second clutch is held in a partial clutch engagement condition, and

in a case of a down-slope, the first clutch is held in the partial clutch engagement condition,

wherein the controller executes control for holding the clutch in the partial clutch engagement condition in spite that brake operation for the vehicle is not operated when an inclination in a pitching direction is equal to or exceeds a predetermined value while the slow mode is selected.

3. The driving force control device for saddled vehicle according to claim 1, wherein the controller holds both the first clutch and the second clutch in the partial clutch engagement condition when a road surface is judged as a flat hardly inclined in the pitching direction.

4. The driving force control device for saddled vehicle according to claim 1, wherein predetermined operation for slow forward movement or slow backward movement in the slow mode is an operation of shift switch for directing shift up and shift down of the transmission.

5. The driving force control device for saddled vehicle according to claim 4,

wherein the transmission includes a plurality of forward gears and a single backward gear, and

when the slow mode is selected, the first clutch is engaged for transmitting the driving force by the backward gear, the second clutch is engaged for transmitting the driving force by the second-speed gear out of the plurality of forward gears.

6. The driving force control device for saddled vehicle according to claim 1, comprising a mode switch for switching the normal mode to the slow mode.

7. The driving force control device for saddled vehicle according to claim 1, comprising

braking devices that make the driving wheel of the vehicle and another wheel generate braking force,

wherein the controller holds braking force in predetermined time even if control force decreases when the control force of the braking devices is equal to or exceeds a predetermined value while the slow mode is selected.

8. The driving force control device for saddled vehicle according to claim 7, wherein when the predetermined operation for the slow forward movement and the slow backward movement is performed while the braking force is held, the braking force is released after the driving force starts to be transmitted to the driving wheel.

9. The driving force control device for saddled vehicle according to claim 1,

wherein a throttle controller that adjusts output of the engine is a throttle-by-wire type for driving a throttle valve by a motor according to at least turning angle information of a throttle grip, and

while the slow mode is selected, turning operation for output of the engine of the throttle grip is invalidated.

10. The driving force control device for saddled vehicle according to claim 1,

wherein the clutch is a dual clutch configured by a first clutch engaged in the slow backward movement and a second clutch engaged in the slow forward movement,

a wheel speed sensor for detecting wheel speed of the vehicle is provided,

the controller judges an inclination in a pitching direction of the vehicle on the basis of the wheel speed in a state in which the slow mode is selected,

the second clutch is held in the partial clutch engagement condition in a case of an up-slope, and

the first clutch is held in the partial clutch engagement condition in a case of a down-slope.

11. The driving force control device for saddled vehicle according to claim 3, wherein predetermined operation for slow forward movement or slow backward movement in the slow mode is an operation of shift operation switch for directing shift up and shift down of the transmission.

12. The driving force control device for saddled vehicle according to claim 11,

wherein the transmission includes a plurality of forward gears and a single backward gear, and

when the slow mode is selected, the first clutch is engaged for transmitting the driving force by the backward gear, the second clutch is engaged for transmitting the driving force by the second-speed gear out of the plurality of forward gears.

13. The driving force control device for saddled vehicle according to claim 3, comprising a mode switch for switching the normal mode to the slow mode.

14. The driving force control device for saddled vehicle according to claim 4, comprising a mode switch for switching the normal mode to the slow mode.

15. The driving force control device for saddled vehicle according to claim 5, comprising a mode switch for switching the normal mode to the slow mode.

16. The driving force control device for saddled vehicle according to claim 3, comprising

braking devices that make the driving wheel of the vehicle and another wheel generate braking force,

wherein the controller holds braking force in predetermined time even if control force decreases when the control force of the braking devices is equal to or exceeds a predetermined value while the slow mode is selected.

17. The driving force control device for saddled vehicle according to claim 16, wherein when the predetermined operation for the slow forward movement and the slow backward movement is performed while the braking force is held, the braking force is released after the driving force starts to be transmitted to the driving wheel.

18. The driving force control device for saddled vehicle according to claim 3,

wherein a throttle controller that adjusts output of the engine is a throttle-by-wire type for driving a throttle valve by a motor according to at least turning angle information of a throttle grip, and

while the slow mode is selected, turning operation for output of the engine of the throttle grip is invalidated.

19. The driving force control device for saddled vehicle according to claim 4, comprising

braking devices that make the driving wheel of the vehicle and another wheel generate braking force,

wherein the controller holds braking force in predetermined time even if control force decreases when the control force of the braking devices is equal to or exceeds a predetermined value while the slow mode is selected.

20. The driving force control device for saddled vehicle according to claim 19, wherein when the predetermined operation for the slow forward movement and the slow backward movement is performed while the braking force is held, the braking force is released after the driving force starts to be transmitted to the driving wheel.

21. The driving force control device for saddled vehicle according to claim 4,

wherein a throttle controller that adjusts output of the engine is a throttle-by-wire type for driving a throttle valve by a motor according to at least turning angle information of a throttle grip, and

while the slow mode is selected, turning operation for output of the engine of the throttle grip is invalidated.

2. (canceled)