Circuit arrangement and device for regulation and control of the speed of a motor vehicle

• US 20030014174A1
• Filed: 08/09/2002
• Published: 01/16/2003
• Est. Priority Date: 02/09/2000
• Status: Abandoned Application

• Current Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Original Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Inventors: Giers, Bernhard
• Application Number:
  US10/203,681
• Publication Number:
  US 20030014174A1
• Time in Patent Office: Days
• US Class Current: 701/70
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• CPC Class Codes: B60K 31/04 and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
• CPC Class Codes: B60T 2201/02 Active or adaptive cruise control system; Distance control
• CPC Class Codes: B60T 2210/12 Friction
• CPC Class Codes: B60T 2210/24 Curve radius
• CPC Class Codes: B60T 2220/02 Driver type; Driving style; Driver adaptive features
• CPC Class Codes: B60T 8/1755 Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2540/30 Driving style
• CPC Class Codes: B60W 2552/20 Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
• CPC Class Codes: B60W 2552/30 Road curve radius
• CPC Class Codes: B60W 2552/35 Road bumpiness, e.g. potholes
• CPC Class Codes: B60W 2552/40 Coefficient of friction
• CPC Class Codes: B60W 40/09 Driving style or behaviour

Abstract

The present invention relates to a circuit arrangement and a device for regulation and control of the driving speed of a motor vechicle, including a functional group for regulating the driving speed according to a nominal value predetermined by the driver and a functional group for limiting the driving speed by a control and/or regulation intervention with respect to a limit value that depemds on the driving situation, predetermined criteria and the actual speed. The circuit arrangement (4) for regulation and control of the driving speed is designed as a component of an overall system (1 to 4) which comprises a wheel slip control system (1 to 3) such as an ABS, a TCS, an ESP, etc., and evaluates control quantities of the wheel slip control system (1 to 3) to limit the driving speed in predefined situations.

Claims

1. Circuit arrangement for regulation and control of the driving speed of a motor vehicle, including a functional group for regulating the driving speed according to a nominal value predetermined by the driver and a functional group for limiting the driving speed by a control and/or regulation intervention with respect to a limit value (V_limit) that depends on the driving situation, predetermined criteria and the actual speed,

characterized in that the circuit arrangement for regulation and control of the driving speed (4) is designed as a component of an overall system (1 to 4) which comprises a wheel slip control system (1 to 3) such as an ABS (1), and/or a TCS (2), and/or an ESP (3), etc., and in that input or control quantities (V_wheel, V_vehicle, b_transverse, μ

, CD, SA, etc.) of the wheel slip control system (1 to 3) are evaluated to regulate and limit the driving speed of the vehicle in predefined situations, in particular in situations critical in terms of driving safety, driving stability, or driving comfort.

2. Circuit arrangement as claimed in claim 1,

characterized in that the limit value of the driving speed, when cornering is detected (CD), is reduced in dependence on the curve radius or the steering angle (SA), and/or in the event of a transverse acceleration (b_transverse) or a corresponding measured quantity which is derived from the transverse acceleration.

3. Circuit arrangement as claimed in claim 1 or 2,

characterized in that the limit value of the driving speed (V_limit) is varied in dependence on the current coefficient of friction μ

or a measured variable representative of the coefficient of friction.

4. Circuit arrangement as claimed in any one or more of claims 1 to 3,

characterized in that the limit value of the driving speed during cornering is reduced in dependence on the current coefficient of friction or a measured variable representative of the coefficient of friction.

5. Circuit arrangement as claimed in any one or more of claims 1 to 4,

characterized in that the limit value of the driving speed (V_limit) and/or the limit value variation during cornering, during transverse acceleration, at a low coefficient of friction, etc., is adapted to the ‘

style of driving’

or the driving characteristics of the driver by predefining or presetting a control or speed characteristics or by gathering the driving behavior of the driver in a learning process.

6. Circuit arrangement as claimed in any one or more of claims 1 to 5,

characterized in that information with respect to cornering detection (CD) or determination of the transverse acceleration, for establishing the coefficient of friction, and/or other information for adapting the limit value or the limit value variation is obtained by means of the wheel slip control system (1, 2, 3) and sent to the functional group for limiting the driving speed of the speed controller (4).

7. Device for regulation and control of the driving speed of a motor vehicle, including a functional group for regulating the driving speed according to a nominal value predetermined by the driver and a functional group for limiting the driving speed by a control and/or regulation intervention with respect to a limit value (V_limit) that depends on the driving situation, predetermined criteria and the actual speed,

characterized in that the device for regulation and control of the speed (4) is designed as a component of an overall system (1 to 4) which comprises a brake system with a wheel slip control system (1 to 3) such as an ABS, and/or a TCS, and/or an ESP, etc., and the speed regulation system (4).