Vehicle running control device and vehicle

• US 6,622,078 B1
• Filed: 11/13/2001
• Issued: 09/16/2003
• Est. Priority Date: 05/12/1999
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakamura, Kozo, Minowa, Toshimichi, Kuroda, Hiroshi, Yoshikawa, Tokuji, Kuragaki, Satoru, Takano, Kazuaki
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): PIPALA, EDWARD J
• Application Number:
  US09/959,943
• Time in Patent Office: 672 Days
• Field of Search: 701/96, 701/93, 701/70, 701/76, 701/79, 180/169, 180/179
• US Class Current: 701/96
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60W 2554/804 Relative longitudinal speed
• CPC Class Codes: B60W 2556/10 Historical data
• CPC Class Codes: B60W 2754/30 Longitudinal distance
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
• CPC Class Codes: B60W 30/17 with provision for special action when the preceding vehicle comes to a halt, e.g. stop and go
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: F02D 2200/501 Vehicle speed
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 29/02 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
• CPC Class Codes: F02D 41/0225 in relation with the gear ratio or shift lever position

Abstract

A vehicle control device smoothly and constantly stops a controlled vehicle at the same vehicle-to-vehicle distance each time a preceding vehicle stops. The vehicle control device includes a unit that detects the speed of the preceding vehicle, and a unit that detects the distance between the preceding vehicle and the controlled vehicle. A first target distance setting unit is set when the preceding vehicle is running at a speed level higher than a preset speed; and a second target distance setting unit is set when it is running at a speed lower than the preset speed, and either a first target vehicle-to-vehicle distance or a second target vehicle-to-vehicle distance is selected.

Claims

1. A vehicle running control device having:

a first running mode in which a distance between an own vehicle and a preceding vehicle is controlled to a running target vehicle-to-vehicle distance; and

a second running mode in which the distance between the own vehicle and the preceding vehicle is controlled to a stoppage target vehicle-to-vehicle distance;

wherein said first running mode and said second running mode are switched on the basis of speed of the preceding vehicle.

2. The vehicle running controlling device according to claim 1, further comprising means for anticipating a future speed of the preceding vehicle based on present or past information.

3. The vehicle running controlling device according to claim 1, wherein said speed is a value within a range of from zero to 18 kilometers per hour.

4. The vehicle running controlling device according to claim 1, wherein after an accelerated speed of the controlled vehicle has been increased to a value greater than an accelerated speed of the controlled vehicle when speed of the preceding vehicle became substantially zero, stoppage is carried out.

5. A vehicle according to claim 1, wherein said target value is a value from 0.5 m to 5 m.

6. The vehicle running controlling device according to claim 1, wherein said target value is set when both of the speed of the preceding vehicle and the speed of the controlled vehicle are substantially zero.

7. The vehicle running controlling device according to claim 6, wherein, when the measured distance between the proceeding vehicle and the controlled vehicle is smaller than a preset minimum value in said first running mode, said measured distance is set as said target value.

8. The vehicle running controlling device according to claim 6, wherein, when the measured distance between the proceeding vehicle and the controlled vehicle is larger than a pre-stored minimum value in said first running mode, said minimum value is set as said target value.

9. A vehicle running controlling device according to claim 6, wherein said setting is input by the driver.

10. A vehicle running control device having:

a first running mode in which a distance between an own vehicle and a preceding vehicle is controlled to a running target vehicle-to-vehicle distance; and

a second running mode in which the distance between the own vehicle and the preceding vehicle is controlled to a stoppage target vehicle-to-vehicle distance;

wherein, after detection that the speed of the preceding vehicle is substantially zero, said first running mode is switched to said second running mode.

11. In a vehicle comprising:

an internal combustion engine or a motor;

a transmission shaft for transmitting rotation of said internal combustion engine or said motor to a wheel;

modification means installed in said internal combustion engine or motor, said transmission shaft or said wheel, for modifying rotational speed thereof;

relative speed detection means for detecting the relative speed between the vehicle and a preceding vehicle;

vehicle-to-vehicle distance detection means for detecting distance between the vehicle and said preceding vehicle; and

control means receiving signals from said relative speed detection means and said vehicle-to-vehicle distance detection means, for outputting a control signal to said modification means;

a vehicle running control device, wherein

said control means has a first running mode in which the distance between the vehicle and said preceding vehicle is controlled to a running target vehicle-to-vehicle distance; and

a second running mode in which the detected vehicle-to-vehicle distance is controlled to a stoppage target vehicle-to-vehicle distance; and

said first running mode is switched to said second running mode on the basis of the speed of said preceding vehicle.

12. In a vehicle comprising:

an internal combustion engine or a motor;

a transmission shaft for transmitting rotation of said internal combustion engine or said motor to a wheel;

modification means installed in said internal combustion engine or motor, said transmission shaft, or said wheel, for modifying rotational speed thereof;

relative speed detection means for detecting relative speed between the vehicle and a preceding vehicle;

vehicle-to-vehicle distance detection means for detecting distance between the vehicle and said preceding vehicle; and

control means receiving signals from said relative speed detection means and said vehicle-to-vehicle distance detection means, for outputting a control signal to said modification means;

a vehicle running control device, wherein

said control means has a first running mode in which the distance between the vehicle and said preceding vehicle is controlled to a running target vehicle-to-vehicle distance;

a second running mode in which the detected vehicle-to-vehicle distance is controlled to a stoppage target vehicle-to-vehicle distance; and

after the detection that the speed of the preceding vehicle is substantially zero, said first running mode is switched to said second running mode.

13. In a vehicle comprising:

detection means for detecting distance between the vehicle and a preceding vehicle;

an internal combustion engine or a motor;

a transmission shaft for transmitting rotation of said internal combustion engine or motor to a wheel;

modification means installed in said internal combustion engine or motor, said transmission shaft or said wheel, for modifying rotational speed thereof; and

control means receiving a signal from said detection means, for supplying a control signal to said modification means and causing the vehicle to run following said preceding vehicle;

a vehicle running control device, wherein

when said preceding vehicle has stopped, accelerated speed of the vehicle is made larger than accelerated speed of the vehicle at the time when said preceding vehicle is stopped, and thereafter stoppage is carried out with a distance between the vehicles at the back with respect to said preceding vehicle.

14. A vehicle comprising:

detection means for detecting distance between the vehicle and a preceding vehicle;

an internal combustion engine or motor;

a transmission shaft for transmitting the rotation of said internal combustion engine or motor to a wheel;

modification means installed in said internal combustion engine or motor, said transmission shaft, or said wheel, for modifying rotational speed thereof; and

control means receiving a signal from said detection means, for supplying a control signal to said modification means and causing the vehicle to run following said preceding vehicle;

wherein the vehicle continues running even after said preceding vehicle has stopped, and after the distance between said preceding vehicle and the vehicle has fallen below a target value, stoppage is carried out with a distance between the vehicles at the back with respect to said preceding vehicle.

15. A vehicle comprising:

detection means for detecting distance between the vehicle and a preceding vehicle;

an internal combustion engine or motor;

a transmission shaft for transmitting rotation of said internal combustion engine or motor to a wheel;

modification means installed in said internal combustion engine or motor, said transmission shaft or said wheel, for modifying rotational speed thereof; and

control means receiving a signal from said detection means, for supplying a control signal to said modification means and causing the own vehicle to run following said preceding vehicle;

wherein even when said preceding vehicle has stopped, the vehicle also stops and thereafter restarts the running and stoppage is carried out with a distance between the vehicles at the back with respect to said preceding vehicle.