Hybrid vehicle

• US 7,178,617 B2
• Filed: 10/26/2001
• Issued: 02/20/2007
• Est. Priority Date: 05/02/1996
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ozeki, Tatsuya, Morisawa, Kunio
• Primary Examiner(s): PHAN, HAU VAN
• Application Number:
  US09/983,874
• Publication Number:
  US 20020023789A1
• Time in Patent Office: 1,943 Days
• Field of Search: 180/65.1, 180/65.2, 180/65.3, 180/65.4, 180/65.5, 180/65.6, 180/65.7, 180/65.8, 701/20, 701/51, 701/87, 701/95, 701/107, 701/213, 701/22
• US Class Current: 180/65.265
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 17/356 having fluid or electric motor, for driving one or more wheels disposition of motor in, or adjacent to, traction wheel B60K7/00
• CPC Class Codes: B60K 23/0808 for varying torque distribution between driven axles, e.g. by transfer clutch
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• 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 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/16 longitudinal
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/68 Traffic data
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2260/28 Four wheel or all wheel drive
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/62 charged by low-power generators primarily intended to support the batteries, e.g. range extenders
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60L 7/14 : for vehicles propelled by ac motors
• CPC Class Codes: B60T 2270/603 : ASR features related thereto
• 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 10/10 : including control of change-speed gearings
• CPC Class Codes: B60W 10/18 : including control of braking 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 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 2050/143 : Alarm means
• CPC Class Codes: B60W 2520/10 : Longitudinal speed
• CPC Class Codes: B60W 2540/06 : Ignition switch
• CPC Class Codes: B60W 2540/22 : Psychological state; Stress level or workload
• CPC Class Codes: B60W 2540/221 : Physiology, e.g. weight, heartbeat, health or special needs
• CPC Class Codes: B60W 2552/15 : Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2554/00 : Input parameters relating to objects
• CPC Class Codes: B60W 2554/801 : Lateral distance
• CPC Class Codes: B60W 2554/802 : Longitudinal distance
• CPC Class Codes: B60W 30/18127 : Regenerative braking
• CPC Class Codes: F02D 2200/501 : Vehicle speed
• CPC Class Codes: F16H 2059/006 : Overriding automatic control
• CPC Class Codes: F16H 2059/385 : Turbine speed
• CPC Class Codes: F16H 2059/467 : of torque converter
• CPC Class Codes: F16H 2059/6807 : Status of gear-change operation, e.g. clutch fully engaged
• CPC Class Codes: F16H 59/68 : Inputs being a function of gearing status
• CPC Class Codes: F16H 59/70 : dependent on the ratio established
• CPC Class Codes: F16H 59/72 : dependent on oil characteristics, e.g. temperature, viscosity
• CPC Class Codes: F16H 61/14 : Control of torque converter lock-up clutches
• CPC Class Codes: F16H 61/20 : Preventing gear creeping ; Transmission control during standstill, e.g. hill hold control
• CPC Class Codes: F16H 61/21 : Providing engine brake control
• CPC Class Codes: F16H 63/40 : comprising signals other than signals for actuating the final output mechanisms
• CPC Class Codes: F16H 63/502 : for smoothing gear shifts
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y10S 903/903 : having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/916 : with plurality of drive axles
• CPC Class Codes: Y10S 903/917 : with transmission for changing gear ratio
• CPC Class Codes: Y10S 903/919 : Stepped shift
• CPC Class Codes: Y10S 903/945 : Characterized by control of gearing, e.g. control of transmission ratio
• CPC Class Codes: Y10S 903/947 : Characterized by control of braking, e.g. blending of regeneration, friction braking

Abstract

A hybrid vehicle having an engine and a motor to be controlled independently of each other for running the vehicle. This hybrid vehicle is given a braking demand detecting function to detect a braking demand through an idle ON of the engine while the vehicle is running, and a first braking function to suppress the rise in the vehicle speed of the vehicle by a regenerative braking force of the motor if the braking demand is detected by the braking demand detecting function.

Claims

1. A hybrid vehicle for assisting the driving force or braking force, when the vehicle is run by an output of a first prime mover, with the driving force or braking force of a second prime mover to be controlled independently of said first prime mover, said hybrid vehicle including an automatic transmission connected to the output side of the first prime mover to output, from the automatic transmission, the output of the first prime mover with at least two speed stages, comprising:

speed change detecting means for detecting a speed change of the speed stage in said transmission, and

a control means for adding the output of the second prime mover, not through the automatic transmission, to the driving force of said hybrid vehicle, when the speed change is detected by said speed change detecting means, on the basis of the change in the output torque at the speed change of said automatic transmission.

2. A hybrid vehicle according to claim 1,

wherein said control means includes a means for adding the output torque of said second prime mover to the drive force of said hybrid vehicle while the speed change is executed by said automatic transmission.

3. A control method for a hybrid vehicle for assisting the driving force or braking force, when the vehicle is run by an output of a first prime mover, with the driving force or braking force of a second prime mover to be controlled independently of said first prime mover, said hybrid vehicle including an automatic transmission connected to the output side of the first prime mover to output, from the automatic transmission, the output of the first prime mover with at least two speed stages, comprising:

a first step for detecting a speed change of the speed stage in said automatic transmission, and

a second step for adding the output of the second prime mover, not through the automatic transmission, to the driving force of said hybrid vehicle, when the speed change is detected at the first step, on the basis of the change in the output torque at the speed change of said automatic transmission.

4. A control method for a hybrid vehicle according to claim 3,

wherein said second step includes adding the output torque of said second prime mover to the drive force of said hybrid vehicle while the speed change is executed by said automatic transmission.

5. A hybrid vehicle for assisting the driving force or braking force, when the vehicle is run by an output of a first prime mover, with the driving force or braking force of a second prime mover to be controlled independently of said first prime mover, said hybrid vehicle including an automatic transmission connected to the output side of the first prime mover to output, from the automatic transmission, the output of the first prime mover with at least two speed stages, comprising:

first detecting means for detecting that the driving force of said hybrid vehicle changes according to the speed change of the speed change in said automatic transmission; and

control means for controlling the output of the second prime mover, not through the automatic transmission, in a direction to suppress the changing range of the driving force of said hybrid vehicle, when the change in the driving force of said hybrid vehicle is detected by said first detecting means.

6. A control method for a hybrid vehicle for assisting the driving force or braking force, when the vehicle is run by an output of a first prime mover, with the driving force or braking force of a second prime mover to be controlled independently of said first prime mover, said hybrid vehicle including an automatic transmission connected to the output side of first prime mover to output, from the automatic transmission, the output of the first prime mover with at least two speed stages, comprising:

a first step for detecting that the driving force of said hybrid vehicle changes according to the speed change of the speed stage in said transmission; and

a second step for controlling the output of the second prime mover, not through the automatic transmission, in a direction to suppress the changing range of the driving force of said hybrid vehicle, when the change in the driving force of said hybrid vehicle is detected in said first step.

7. A hybrid vehicle for assisting the driving force or braking force, when the vehicle is run by an output of a first prime mover, with the driving force or braking force of a second prime mover to be controlled independently of said first prime mover, said hybrid vehicle including a transmission connected to the output side of the first prime mover to output, from the automatic transmission, the output of the first prime mover with at least two speed stages, comprising:

first detecting means for detecting the change in the driving force of said hybrid vehicle according to the change of the operating state of the first prime mover; and

control means for controlling the output of the second prime mover, not through the automatic transmission, in a direction to suppress the changing range of the driving force of said hybrid vehicle, when the change in the driving force of said hybrid vehicle is detected by said first detecting means.

8. A hybrid vehicle according to claim 7

wherein the first detecting means detects the change of the operating state from a power-on state to a power-off state and from the power-off state to the power-on state of the first prime mover.

9. A control method for a hybrid vehicle for assisting the driving force or braking force, when the vehicle is run by an output of a first prime mover, with the driving force or braking force of a second prime mover to be controlled independently of said first prime mover, said hybrid vehicle including a transmission connected to the output side of first prime mover to output, from the automatic transmission, the output of the first prime mover with at least two speed stages, comprising:

a first step for detecting the change in the driving force of said hybrid vehicle changes according to the change of the operating state of the first prime mover; and

a second step for controlling the output of the second prime mover, not through the automatic transmission, in a direction to suppress the changing range of the driving force of said hybrid vehicle, when the change in the driving force of said hybrid vehicle is detected in said first step.

10. A hybrid vehicle according to claim 9,

wherein in the first step the change of the operating state from a power-on state to a power-off state and from the power-off state to the power-on state of the first prime mover is detected.