Hybrid vehicle

• US 6,814,170 B2
• Filed: 07/17/2002
• Issued: 11/09/2004
• Est. Priority Date: 07/18/2001
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Abe, Tatsuo, Inada, Eiji
• Primary Examiner(s): FISCHMANN, BRYAN R
• Application Number:
  US10/196,163
• Publication Number:
  US 20030015358A1
• Time in Patent Office: 846 Days
• Field of Search: 180/65.2, 180/65.3, 180/65.4, 180/65.6, 180/65.7, 180/65.8, 701/22, 318/139, 318/587, 477/2, 477/3, 477/4, 477/5, 290/400, 322/14, 322/15, 322/16, 606/98
• US Class Current: 180/65.25
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• 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 2240/62 Vehicle position
• CPC Class Codes: B60L 2250/16 by display
• 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 2510/244 Charge state
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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 903/918 Continuously variable

Abstract

A point at which an external power supply is installed is registered in map data in a map information device as a base point. An EV running area centered on the aforesaid base point is registered as map data in the aforesaid map information device. When running towards the base point from outside the EV running area, while performing HEV running before arriving in the EV running area, the charge value of the battery is increased beforehand. Hence, when the vehicle enters the EV running area, it switches to EV running.

Claims

1. A hybrid vehicle which includes a generator, an engine which drives the generator, a motor which drives the vehicle and a battery connected to the generator and motor, and performs EV running wherein the vehicle is driven by the motor alone using electric power stored in the battery, and HEV running wherein the engine is operated and the vehicle is driven by at least one of the engine and the motor, comprising:

an external charge device which charges the battery using an external power supply,

a map information device which includes map data and recognizes the present position of the vehicle on the map data, and

a controller which functions to;

register a base point in the map data, the base point being a point at which the external charge device is installed,

register an EV running area centered on the base point in the map data in the map information device based on a charge value of the battery,

increase the charge value of the battery during HEV running before arriving at the EV running area, when the vehicle runs towards the base point from outside the EV running area, and

switch to EV running when the vehicle enters the EV running area.

2. The hybrid vehicles as defined in claim 1, wherein the controller further functions to increase the charge value of the battery by switching a target charge value to a high target charge value higher than a normal target charge value, the normal target charge value being a target value of the charge value of the battery when the vehicle performs HEV running outside the EV running area while maintaining the charge value of the battery constant.

3. The hybrid vehicle as defined in claim 2, wherein the target charge value is switched to the high target charge value when the vehicle reached a point at a predetermined distance back from a boundary point of the EV running area.

4. The hybrid vehicle as defined in claim 3, where the predetermined distance is a distance required for raising the charge value of the battery to the high target charge value using generated electric power of the generator after switching to the high target charge value.

5. The hybrid vehicle as defined in claim 4, wherein the controller further functions to:

compute a power generation time required for increasing the charge value of the battery to the high target charge value by dividing a value obtained by deducting the present charge value of the battery from the high target charge value by a generated power corresponding value, the generated power corresponding value being a value which corresponds to generated power of the generator, and

compute a value obtained by multiplying the power generation time by the vehicle speed as the predetermined distance.

6. The hybrid vehicle as defined in claim 1, wherein the EV running area is an area where the vehicle can reach the base point before the charge value of the battery falls to a predetermined minimum charge value for carrying out the EV running.

7. The hybrid vehicle as defined in claim 1, wherein the EV running area is registered so that the charge value of the battery coincides with a predetermined minimum charge value for carrying out the EV running when the vehicle arrives at the base point.

8. The hybrid vehicle as defined in claim 2, wherein the controller further functions to switch to EV running when it is determined that the vehicle has reached a point at which EV running to the base point can be performed based on the charge value of the battery after the switching to the high target charge value.

9. The hybrid vehicle as defined in claim 8, wherein the controller further functions to:

divide difference between the charge value of the battery after the switching to the high target charge value and a predetermined minimum charge value for carrying out the EV running by a power consumption rate corresponding value to compute a distance which can be run under EV running, the power consumption rate corresponding value being a value which corresponds to a power consumption rate of the motor when running out of the EV running area from the base point, and

when the distance which can be run under EV running exceeds a distance on a route from a present position to the base point, determine that the vehicle has reached the point at which EV running to the base point can be performed.

10. The hybrid vehicle as defined in claim 8, wherein the controller further functions to set a switching point to the high target charge value based on the shift of the charge value of the battery after the switching to EV running so that the charge value of the battery coincides with a predetermined minimum charge value for carrying out the EV running when the vehicle has reached the base point.

11. The hybrid vehicle as defined in claim 10, wherein the controller further functions to:

switch to HEV running, and store the EV running distance when the charge value falls to the predetermined minimum charge value of the battery before reaching the base point,

compute a distance which increases the normal target charge value to the high charging value using a power generation rate corresponding value which corresponds to a power generation rate of the generator during HEV running after the switching to the high target charge value, and

set the switching point to the high target charge value to a position returning back from the base point by the sum of the distance which increases the normal target charge value to the high charging value and an EV running distance.

12. The hybrid vehicle as defined in claim 10, wherein the controller further functions to:

store an EV running distance when the charge value has not fallen to the predetermined minimum charge value of the battery at the base point,

compute a distance in which EV running is still possible with the charge value of the battery at the base point using a power consumption rate which corresponds to a power generation rate of the generator corresponding value under EV running,

compute a distance which increases the normal target charge value to the high target charge value using a power generation rate corresponding value which corresponds to a power generation rate of the generator during HEV running after the switching to the high target charge value, and

set the switching point to the high target charge value to a position returning back from the base point by the sum of the distance which increases the normal target charge value to the high charging value, EV running distance and the distance in which EV running is still possible.

13. The hybrid vehicle as defined in claim 1, wherein the charge value of the battery is the charge state of the battery.

14. The hybrid vehicle as defined in claim 1, wherein the charge value of the battery is the charge amount of the battery.

15. A hybrid vehicle which includes a generator, an engine which drives the generator, a motor which drives the vehicle and a battery connected to the generator and motor, and performs EV running wherein the vehicle is driven by the motor alone using electric power stored in the battery without operating the engine, and HEV running wherein the vehicle is driven by at least one of the engine and the motor, comprising:

external charge means for charging the battery using an external power supply,

a map information device which includes map data and recognizes the present position of the vehicle on the map data,

means for registering a base point in the map data, the base point being a point at which the external charge device is installed,

means for registering an EV running area centered on the base point in the map data in the map information device,

means for increasing the charge value of the battery during HEV running before arriving at the EV running area, when the vehicle runs towards the base point from outside the EV running area, and

means for switching to EV running when the vehicle enters the EV running area.