Hybrid vehicle with internal combustion engine and electric motor installed

• US 20090125173A1
• Filed: 10/28/2008
• Published: 05/14/2009
• Est. Priority Date: 11/08/2007
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kubo, Kaoru, Komatsu, Masayuki
• Application Number:
  US12/289,450
• Publication Number:
  US 20090125173A1
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/14 Acceleration
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/25 by controlling the electric load
• CPC Class Codes: B60L 7/10 Dynamic electric regenerative braking B60L7/22 takes precedence
• 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 10/26 : for electrical energy, e.g. batteries or capacitors
• 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 20/13 : in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2050/146 : Display means
• CPC Class Codes: B60W 2510/087 : Temperature
• CPC Class Codes: B60W 2510/244 : Charge state
• CPC Class Codes: B60W 2510/246 : Temperature
• CPC Class Codes: B60W 2520/10 : Longitudinal speed
• CPC Class Codes: B60Y 2200/90 : Vehicles comprising electric prime movers
• CPC Class Codes: Y02T 10/40 : Engine management systems
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : 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

Abstract

A display unit includes a speed display unit. The speed display unit includes an area, a threshold line and a pointer. The area indicates a vehicle speed (km/h). The threshold line indicates a threshold value at which operation and stop of an engine is switched. The threshold line is variably set by SOC and a temperature of a power storage device, a temperature of an inverter, a temperature of a motor generator and the like. The pointer indicates the movement direction of the threshold line.

Claims

1. A hybrid vehicle with an internal combustion engine and an electric motor installed as a power source for traveling, comprising:

a control device causing said internal combustion engine to operate when a vehicle speed exceeds a predetermined first threshold value; and

a display device displaying said first threshold value together with said vehicle speed.

2. The hybrid vehicle according to claim 1, further comprising:

a power storage device storing electric power to be supplied to said electric motor, wherein

as a state quantity indicating a state of charge of said power storage device is lower, said control device sets said first threshold value to be lower.

3. The hybrid vehicle according to claim 1, further comprising:

a power storage device storing electric power to be supplied to said electric motor, wherein

when a temperature of said power storage device is out of a specified range, said control device sets said first threshold value to a value lower than when said temperature is within said specified range.

4. The hybrid vehicle according to claim 1, wherein

as a temperature of said electric motor is higher, said control device sets said first threshold value to be lower.

5. The hybrid vehicle according to claim 1, further comprising:

a drive device driving said electric motor, wherein

as a temperature of said drive device is higher, said control device sets said first threshold value to be lower.

6. The hybrid vehicle according to claim 1, wherein

when said vehicle speed exceeds said first threshold value or when vehicle output exceeds a predetermined second threshold value, said control device causes said internal combustion engine to operate, and

said display device further displays said second threshold value together with said vehicle output.

7. The hybrid vehicle according to claim 6, further comprising:

a power storage device storing electric power to be supplied to said electric motor, wherein

as a state quantity indicating a state of charge of said power storage device is lower, said control device sets said second threshold value to be lower.

8. The hybrid vehicle according to claim 6, further comprising:

a power storage device storing electric power to be supplied to said electric motor, wherein

when a temperature of said power storage device is out of a specified range, said control device sets said second threshold value to a value lower than when said temperature is within said specified range.

9. The hybrid vehicle according to claim 6, wherein

as a temperature of said electric motor is higher, said control device sets said second threshold value to be lower.

10. The hybrid vehicle according to claim 6, further comprising:

a drive device driving said electric motor, wherein

as a temperature of said drive device is higher, said control device sets said second threshold value to be lower.

11. The hybrid vehicle according to claim 6, wherein

said display device displays said vehicle speed and said vehicle output in a two-dimensional area, and also displays an area at which said internal combustion engine is stopped in said two-dimensional area based on said first and second threshold values.

12. The hybrid vehicle according to claim 11, wherein

said display device further displays a contour line indicating that electric power consumption of said electric motor per unit traveling distance is substantially the same in the area at which said internal combustion engine is stopped.