Operation control apparatus and operation control method having drive power adjusted in correspondence with a content of the detected abnormality and a torque request from the driver

• US 6,591,173 B2
• Filed: 05/10/2001
• Issued: 07/08/2003
• Est. Priority Date: 05/10/2000
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nada, Mitsuhiro
• Primary Examiner(s): Zanelli, Michael J.
• Application Number:
  US09/852,039
• Publication Number:
  US 20010041955A1
• Time in Patent Office: 789 Days
• Field of Search: 701/29, 701/34, 701/76, 701/92, 701/97, 701/22, 180/65.2, 180/65.3, 180/65.8
• US Class Current: 701/29
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 3/0038 relating to sensors
• CPC Class Codes: B60L 3/0084 relating to control modules
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• 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: 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 2050/021 Means for detecting failure or malfunction
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 : Accelerator pedal position
• CPC Class Codes: F02D 11/107 : Safety-related aspects
• CPC Class Codes: F02D 2041/227 : Limping Home, i.e. taking specific engine control measures at abnormal conditions
• CPC Class Codes: G05B 9/03 : with multiple-channel loop, i.e. redundant control systems
• CPC Class Codes: G05G 1/30 : Controlling members actuated by foot
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• 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

Abstract

If an abnormality occurs in a vehicle, an abnormality detected-time control is performed in accordance with the kind of the abnormality. An output characteristic of the vehicle is selected in accordance with the kind of the abnormality, so that safety at the time of occurrence of an abnormality can be improved. When such output restriction is performed, the restriction is tightened stepwise. Therefore, safety at the time of occurrence of an abnormality is further improved.

Claims

1. An operation control apparatus installed in a vehicle for controlling a state of running of the vehicle, comprising:

a drive power generating apparatus; and

a controller configured and adapted to control the drive power generating apparatus in a first mode of operation and in a second mode of operation, wherein in the first mode of operation the controller changes a drive power produced by the drive power generating apparatus in accordance with a drive power increasing request from a driver, and wherein upon detection of a specific kind of an abnormality in the vehicle, the controller controls the drive power generating apparatus in the second mode to restrict the drive power produced in correspondence with a content of the detected abnormality and a torque request from the driver.

2. An operation control apparatus according to claim 1, wherein the controller stores a plurality of predetermined during-abnormality control modes including the second mode.

3. An operation control apparatus according to claim 1, wherein, in the second mode, the controller restricts a change in drive power in accordance with a drive power increasing request, in comparison with a change in drive power in accordance with a drive power increasing request when the abnormality is not detected.

4. An operation control apparatus according to claim 1, wherein, in the second mode, the controller prohibits the vehicle from accelerating regardless of a drive power increasing request after a speed of the vehicle reaches a specific speed.

5. An operation control apparatus according to claim 4, wherein, in the second mode, the controller allows a drive power corresponding to a drive power increasing request to be generated until the speed of the vehicle reaches a specific speed, provided that a speed of the vehicle when the abnormality is detected is at least a predetermined speed.

6. An operation control apparatus according to claim 5, wherein, in the second mode, the controller allows a drive power corresponding to the drive power increasing request to be generated until the speed of the vehicle exceeds the specific speed of the vehicle, provided that at least one of certain conditions is met, the certain conditions including a condition that an elapsed time following detection of the abnormality is less than a predetermined time, and a condition that a travel distance following detection of the abnormality is less than a predetermined distance.

7. An operation control apparatus according to claim 1, wherein, in the second mode, the controller controls the drive power generating apparatus to generate drive power by using a portion thereof capable of functioning normally when the abnormality occurs, and the controller changes the drive power in accordance with the drive power increasing request.

8. An operation control apparatus according to claim 1, wherein, in the second mode, the controller restricts the drive power of the vehicle in a stepwise fashion based on at least one of an elapsed time following detection of the abnormality and a travel distance following detection of the abnormality.

9. An operation control apparatus according to claim 8, further comprising a plurality of detectors that detect a specific quantity of displacement regarding the vehicle,

wherein the abnormality is an abnormality that occurs in at least one of the detectors, such that an abnormality occurring in at least another one of the detectors renders it impossible to detect the specific quantity of displacement.

10. An operation control apparatus according to claim 1, wherein, in the second mode, the controller causes the drive power generating apparatus to output a small drive power that allows the vehicle to be moved via the drive power generating apparatus regardless of a drive power increasing request.

11. A vehicle comprising a operation control apparatus for controlling a state of running of the vehicle, comprising:

a drive power generating apparatus; and

a controller configured and adapted to control the drive power generating apparatus in a first mode of operation and in a second mode of operation, wherein in the first mode of operation the controller changes a drive power produced by the drive power generating apparatus in accordance with a drive power increasing request from a driver, and wherein upon detection of a specific abnormality in the vehicle, the controller controls the drive power generating apparatus in the second mode to restrict the drive power produced in correspondence with a content of the detected abnormality and a torque request from the driver.

12. An operation control apparatus installed in a vehicle for controlling a state of running of the vehicle, comprising:

a drive power generating apparatus;

a controller adapted to perform a control for driving the drive power generating apparatus; and

an abnormality detector positioned and adapted to detect a specific kind of abnormality in the vehicle,

wherein the controller restricts the drive power of the vehicle in a stepwise fashion when the abnormality detector detects the abnormality.

13. An operation control apparatus according to claim 12, further comprising a plurality of detectors positioned and adapted to detect a specific quantity of a displacement regarding the vehicle,

wherein the abnormality is an abnormality that occurs in at least one of the detectors, such that an abnormality occurring in at least another one of the detectors renders it impossible to detect the specific quantity of displacement.

14. An operation control apparatus according to claim 12, wherein the controller restricts the drive power based on at least one of an elapsed time following detection of the abnormality and a travel distance following detection of the abnormality.

15. A vehicle having an operation control apparatus for controlling a state of running of the vehicle, comprising:

a drive power generating apparatus;

a controller adapted to perform a control for driving the drive power generating apparatus; and

an abnormality detector positioned and adapted to detect a specific kind of abnormality in the vehicle,

wherein the controller restricts the drive power of the vehicle in a stepwise fashion when the abnormality detector detects the abnormality.

16. An operation control method for controlling a state of running of a vehicle, the vehicle using a drive power generating apparatus for generating a drive power, the method comprising the steps of:

detecting a drive power increasing request for an increase in the drive power of the vehicle;

controlling the drive power generating apparatus so as to change the drive power in accordance with the drive power increasing request;

detecting a specific kind of an abnormality in the vehicle; and

changing, upon detecting the abnormality, a content of control with respect to the drive power generating apparatus to restrict the drive power produced in accordance with a content of the abnormality detected and a torque request from the driver.

17. An operation control method for controlling a state of running of a vehicle, the vehicle using a drive power generating apparatus for generating a drive power, the method comprising the steps of:

detecting a specific kind of an abnormality in the vehicle,

controlling the drive power generating apparatus, when the abnormality is detected, so as to restrict the drive power of the vehicle in a stepwise fashion.