System for influencing the travel dynamics of an automobile

• US 5,510,989 A
• Filed: 05/23/1995
• Issued: 04/23/1996
• Est. Priority Date: 08/29/1992
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Kassner, Uwe, Maihoefer, Bernd, Zabler, Erich
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): Walker, Tyrone V.
• Application Number:
  US08/447,499
• Time in Patent Office: 336 Days
• Field of Search: 364/424.05, 364/426.01, 364/426.02, 364/426.03
• US Class Current: 701/1
• CPC Class Codes: B60G 2400/822 Road friction coefficient determination affecting wheel traction
• CPC Class Codes: B60G 2600/08 Failure or malfunction detecting means
• CPC Class Codes: B60G 2800/21 Traction, slip, skid or slide control
• CPC Class Codes: B60G 2800/702 Improving accuracy of a sensor signal
• CPC Class Codes: B60G 2800/92 ABS - Brake Control
• CPC Class Codes: B60G 2800/93 Skid or slide control [ASR]
• CPC Class Codes: B60G 2800/95 Automatic Traction or Slip Control [ATC]
• CPC Class Codes: B60T 2260/08 Coordination of integrated systems
• 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 2050/0045 using databus protocols
• CPC Class Codes: B60W 2050/0052 Filtering, filters
• CPC Class Codes: B60W 2050/021 Means for detecting failure or malfunction
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 40/10 related to vehicle motion
• CPC Class Codes: F16H 59/48 Inputs being a function of acceleration
• CPC Class Codes: G01D 3/0365 the undesired influence being measured using a separate sensor, which produces an influence related signal
• CPC Class Codes: G05D 1/0891 specially adapted for land vehicles

Abstract

A system for influencing the travel dynamics of an automobile includes at least two sensor units (S1, S2, S3) for capturing the movements of the vehicle. First evaluation units (A1) evaluate the signals of the sensor units, these first evaluation units being spatially combined with the aforementioned sensor units to a sensor module (10). Connected with the first evaluation units by linkage mans (11), second evaluation units (A21, A22, A23, A24) process the signals processed in the first evaluation units, dependent on a regulation and/or control objective, to activation signals for actuators which influence the vehicle movements.

Claims

1. A system for influencing travel dynamics of a vehicle, the vehicle including a plurality of actuators which influence movements of the vehicle, said system comprising:

first and second sensors for respectively sensing first and second movements of the vehicle and for providing respective first and second sensor output signals corresponding thereto, said first and second sensors mounted in close proximity to each other whereby vehicle movements and environmental influences affecting each of said sensors are substantially the same for each of said sensors, said first and second sensors including transverse sensitivities whereby said first and second sensor output signals respectively include components due to said respective second and first movements of said vehicle and which respective second and first movements are not desired to be measured by said respective first and second sensors;

a first evaluation means for performing a first evaluation of said first and second sensor output signals and for providing corrected sensor output signals, said first evaluation comprising correcting for said transverse sensitivities of said first and second sensors by correcting said first sensor output signal as a function of said second sensor output signal based on characteristic dependency curves;

a second evaluation means for activating one of a said actuators; and

linkage means for electronically connecting said first evaluation means and said second evaluation means.

2. The system of claim 1, wherein said first and second sensors each sense at least one of longitudinal movements, transverse movements, and yaw movements of the vehicle.

3. The system of claim 2, wherein said first and second sensors each sense at least one of longitudinal accelerations, transverse accelerations, yaw accelerations, and yaw velocities of the vehicle.

4. The system of claim 1, said first evaluation comprising at least one of:

filtering said sensor output signals;

compensating for non-linearities of said sensor output signals;

monitoring said sensors; and

mathematically transforming said sensor signals dependent on the location of said sensors relative to a predetermined geometric location in the vehicle.

6. The system of claim 1, wherein the vehicle comprises a chassis and a drive, said first evaluation comprising at least one of:

filtering out high-frequency interference signals from said sensor output signals, said interference signals induced by at least one of said chassis and said drive;

compensating for non-linearities of said sensor output signals caused by temperature characteristics of said sensors;

monitoring said sensors; and

mathematically transforming said sensor signals dependent on the location of said sensors relative to the center of gravity of the vehicle.

7. The system of claim 6, further comprising a temperature measuring sensor disposed in close proximity to said sensors.

8. The system of claim 1, wherein said first evaluation means comprises a digital microcontroller.

9. The system of claim 1, wherein said second evaluation means performs at least one of chassis regulation, chassis control, steering regulation, steering control, brake regulation, brake control, drive regulation, and drive control.

10. The system of claim 1, wherein said linkage means comprises a serial bus.

11. The system of claim 1, wherein said first and second sensors are disposed on a microchip.

12. The system of claim 1, further comprising a housing, said first and second sensors and said first evaluation means disposed within said housing, said housing, said first and second sensors, and said first evaluation means defining a sensor module.

13. The system of claim 12, further comprising a temperature measuring sensor disposed within said housing, said housing, said temperature measuring sensor, said first and second sensors, and said first evaluation means defining said sensor module.

14. The system of claim 13, wherein said second evaluation means is disposed exterior of said sensor module.

15. The system of claim 1, wherein said at least two sensors and said first evaluation means are mounted on a printed circuit board.

5. A system for influencing travel dynamics of a vehicle, the vehicle including a plurality of actuators which influence movements of the vehicle, said system comprising:

first and second sensors for sensing first and second movements of the vehicle and for providing respective first and second sensor output signals corresponding thereto, said first and second sensors mounted in close proximity to each other whereby vehicle movements and environmental influences affecting each of said sensors are substantially the same for each of said sensors, said first and second sensors including transverse sensitivities whereby said first and second sensor output signals respectively include components due to said second and first movements of said vehicle and which respective second and first movements are not desired to be measured by said respective first and second sensors, said first and second sensor output signals being dependant on the location of said sensors in the vehicle;

a first evaluation means for performing a first evaluation of said first and second sensor output signals and for providing corrected sensor output signals, said first evaluation comprising mathematically transforming said first and second sensor output signals onto a predetermined geometric location in the vehicle;

a second evaluation means for activating one of a said actuators; and

linkage means for electronically connecting said first evaluation means and said second evaluation means.

17. The system of claim 5, wherein said first evaluation comprises correcting for said transverse sensitivities of said sensors by correcting said first sensor output signal based on said second sensor output signal.

16. A system for influencing travel dynamics of a vehicle, the vehicle including a plurality of actuators which influence movements of the vehicle, said system comprising:

first and second sensors for sensing first and second movements of the vehicle and for providing respective first and second sensor output signals corresponding thereto, said first and second sensors mounted in close proximity to each other whereby vehicle movements and environmental influences affecting each of said sensors are substantially the same for each of said sensors, said first and second sensors including transverse sensitivities whereby said first and second sensor output signals respectively include components due to said second and first movements of said vehicle and which respective second and first movements are not desired to be measured by said respective first and second sensors;

a first evaluation means for performing a first evaluation of said first and second sensor output signals and for providing corrected sensor output signals, said first evaluation comprising monitoring said first and second sensors, and calculating a corrected sensor output signal;

a second evaluation means for activating one of a said actuators; and

linkage means for electronically connecting said first evaluation means and said second evaluation means.