Method and device for controlling a velocity of a motor vehicle

• US 5,955,941 A
• Filed: 10/05/1998
• Issued: 09/21/1999
• Est. Priority Date: 10/10/1997
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Pruksch, Achim, Gaillard, Alain
• Primary Examiner(s): Hofsass, Jeffrey A.
• Assistant Examiner(s): LIEU, JULIE BICHNGOC
• Application Number:
  US09/166,256
• Time in Patent Office: 351 Days
• Field of Search: 340/436, 340/903, 340/435, 340/469, 180/167, 180/169, 180/271, 701/36, 701/48, 701/96, 701/70, 701/91
• US Class Current: 340/435
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/26 Incapacity
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 2554/4048 Field of view, e.g. obstructed view or direction of gaze
• CPC Class Codes: B60W 2554/802 Longitudinal distance
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle

Abstract

A method and a device for adjusting the velocity of a motor vehicle to a programmable target velocity, with a current velocity of the controlled vehicle being measured. A distance sensor measures at least one distance to a vehicle or another obstacle in front of the controlled vehicle. The controlled vehicle is accelerated or decelerated as a function of at least the measured distance and the measured instantaneous velocity. A positive acceleration of the controlled vehicle ceases or is reduced, or the instantaneous velocity of the controlled vehicle is reduced, if a blinding sensor is used to determine that the driver of the controlled vehicle is being blinded by the light of oncoming traffic.

Claims

1. A method for adjusting a velocity of a motor vehicle to a programmable target velocity, comprising the steps of:

measuring an instantaneous velocity of the motor vehicle;

measuring, using a distance sensor, at least one distance from the motor vehicle to an object which is in front of the motor vehicle, the object being one of a further vehicle and an obstacle;

accelerating or decelerating the motor vehicle as a function of at least the measured at least one distance and the measured instantaneous velocity; and

if a blinding sensor determines that a driver of the motor vehicle is blinded by a light of oncoming traffic, performing one of the following;

reducing or eliminating a positive acceleration of the motor vehicle, and

reducing the instantaneous velocity of the motor vehicle.

2. The method according to claim 1, wherein the blinding sensor determines that the driver is blinded by determining that a light intensity of the light exceeds a predetermined maximum value, the predetermined maximum value being in one of a spatial range and an angular range which is relevant for the driver.

3. The method according to claim 2, wherein the predetermined maximum value is an absolute maximum value.

4. The method according to claim 2, wherein the predetermined maximum value is a relative maximum value corresponding to an ambient luminosity.

5. The method according to claim 1, wherein the velocity of the motor vehicle is controlled in a closed loop.

6. A device for controlling a velocity of a motor vehicle, comprising:

a distance sensor determining at least one distance between the motor vehicle and an object in front of the motor vehicle, the object being one of a further vehicle and an obstacle;

a velocity measuring arrangement measuring an instantaneous velocity of the motor vehicle;

a control unit determining at least one control quantity as a function of the measured at least one distance and the measured instantaneous velocity;

a plurality of actuators controlling at least one of a motor controller functional unit, a transmission controller functional unit and a brake controller functional unit as a function of the at least one control quantity;

a blinding detection arrangement detecting a driver blinding condition for a driver of the motor vehicle; and

a controlling arrangement performing one of the following;

preventing or reducing an acceleration of the motor vehicle, and

reducing the instantaneous velocity of the motor vehicle as a function of the driver blinding condition.

7. The device according to claim 6, wherein the blinding detection arrangement includes an at least one-dimensional array of light-sensitive elements for assigning a detected incoming light beam to one of a spatial range and an angular range which is relevant for the driver.