Hybrid Vehicle

• US 20140113766A1
• Filed: 09/11/2013
• Published: 04/24/2014
• Est. Priority Date: 10/19/2012
• Status: Active Grant

• Current Assignee: Kubota Corporation
• Original Assignee: Kubota Corporation
• Inventors: Hayashi, Shigeki, Yagyu, Sumio, Takaki, Go, Kawabata, Shinichi, Nakai, Shohei, Bessho, Hiroki
• Granted Patent: US 9,511,761 B2
• Time in Patent Office: Days
• US Class Current: 477/5
• CPC Class Codes: B60K 2006/4816 Electric machine connected or connectable to gearbox internal shaft
• CPC Class Codes: B60K 6/383 One-way clutches or freewheel devices
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/405 Housings
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/04 including control of propulsion units
• 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 10/18 including control of braking systems
• CPC Class Codes: B60W 20/30 Control strategies involving selection of transmission gear ratio control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H
• CPC Class Codes: B60W 2510/0638 Engine speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2710/021 Clutch engagement state
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2300/42 Control of clutches
• CPC Class Codes: B60Y 2306/05 Cooling
• CPC Class Codes: F16H 9/125 : characterised by means for controlling the geometrical interrelationship of pulleys and the endless flexible member, e.g. belt alignment or position of the resulting axial pulley force in the plane perpendicular to the pulley axis
• CPC Class Codes: F16H 9/18 : only one flange of each pulley being adjustable
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 903/902 : Prime movers comprising electrical and internal combustion motors
• CPC Class Codes: Y10S 903/913 : One way
• CPC Class Codes: Y10S 903/914 : Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/918 : Continuously variable
• CPC Class Codes: Y10S 903/945 : Characterized by control of gearing, e.g. control of transmission ratio
• CPC Class Codes: Y10S 903/946 : Characterized by control of driveline clutch
• CPC Class Codes: Y10S 903/947 : Characterized by control of braking, e.g. blending of regeneration, friction braking

Abstract

A hybrid vehicle includes an engine, a motor, and a belt stepless speed changer device having a driving rotary body, a driven rotary body, a first shaft member supporting the driving rotary body with allowing rotation thereof in unison, a second shaft member supporting the driven rotary body with allowing rotation thereof in unison, and an endless belt wound around the driving rotary body and the driven rotary body. The vehicle further includes a transmission case configured to receive the powers from the engine and the motor via the belt stepless speed changer device and a centrifugal clutch incorporated in a power transmission line extending form the engine to the first shaft member. The motor is disposed on the side opposite the engine across the driving rotary body, and the driving power of the motor is inputted to the first shaft member.

Claims

1. A hybrid vehicle comprising:

an engine;

a motor;

a belt stepless speed changer device having a driving rotary body, a driven rotary body, a first shaft member supporting the driving rotary body with allowing rotation thereof in unison, a second shaft member supporting the driven rotary body with allowing rotation thereof in unison, and an endless belt wound around the driving rotary body and the driven rotary body;

a transmission case configured to receive the powers from the engine and the motor via the belt stepless speed changer device; and

a centrifugal clutch incorporated in a power transmission line extending form the engine to the first shaft member;

wherein the motor is disposed on the side opposite the engine across the driving rotary body, and the driving power of the motor is inputted to the first shaft member.

2. The hybrid vehicle according to claim 1, wherein a drive shaft of the motor is disposed coaxially with the first shaft member, so that the drive shaft and the first shaft member are rotated in unison.

3. The hybrid vehicle according to claim 1, wherein the hybrid vehicle further comprises a support bracket for rotatably supporting an end of the first shaft member on the side of the motor, and the motor is mounted to the support bracket.

4. The hybrid vehicle according to claim 1, wherein the hybrid vehicle further comprises a case member for accommodating the belt stepless speed changer device, and the motor is mounted inside the case member.

5. A hybrid vehicle comprising:

an engine having an output shaft;

a one-way automatic power transmission clutch having an input member and an output member;

a stepless speed changer mechanism having a driving shaft and a driving member; and

a motor generator having a rotor;

wherein the output shaft is connected to the input member, the output member is connected to the driving shaft, and the rotor is connected and mounted on the driving shaft between the driving member and the output member.

6. The hybrid vehicle according to claim 5, wherein the output member and the driving shaft are connected coaxially and together;

the rotor is fixedly engaged to the driving shaft; and

a stator of the motor generator is fixed to a clutch casing of the clutch and to a speed changer case of the stepless speed changer mechanism.

7. The hybrid vehicle according to claim 5, wherein the stepless speed changer mechanism comprises a belt stepless speed changer mechanism;

and the clutch comprises a centrifugal clutch or a one-way clutch.

8. The hybrid vehicle according to claim 5, wherein the hybrid vehicle further comprises a controller, the controller causing the motor generator to motor-drive the rotor when the engine is stopped or is rotated at a low rotation speed or a high rotation speed.

9. The hybrid vehicle according to claim 5, wherein the hybrid vehicle further comprises a controller, the controller causing the motor generator to generator-drive the rotor by the power from the engine when the engine is rotated at a high rotation speed.

10. The hybrid vehicle according to claim 5, wherein the hybrid vehicle further comprises a controller, the controller causing the motor generator to generator-drive the rotor by the power from the stepless speed changer mechanism when there occurs a drop in the rotation speed of the engine.

12. The hybrid vehicle according to claim 10, wherein the input member is engaged with the output shaft;

the output member is connected integrally with an end of the driving shaft; and

the electromagnetic clutch is disposed between the input member and the output member.

11. A hybrid vehicle comprising:

an engine having an output shaft;

a centrifugal clutch having an input member and an output member;

a speed changer mechanism having a driving shaft and a driving member;

a motor generator having a rotor; and

an electromagnetic clutch;

wherein the output shaft is connected to the input member, the output member is connected to the driving shaft, and the rotor is connected and mounted on the driving shaft between the driving member and the output member; and

power transmission is enabled by the electromagnetic clutch when the centrifugal clutch is disengaged.

13. The hybrid vehicle according to claim 11, wherein the electromagnetic clutch can be switched ON for transmitting power from the driving shaft to the output shaft, at the time of starting of the engine, braking of the vehicle, vehicle speed reduction or battery charging.