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Acceleration-based safety monitoring of a drive of a motor vehicle

A technology for safety monitoring and driving devices, applied in road vehicle driving control systems, control devices, mechanical equipment, etc.

Active Publication Date: 2012-11-14
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The actual drive torque M is inversely calculated in the calculation module 10 by a suitable model on the basis of the actuator desired value 6 (or the actual value of the actuator) and on the basis of the signal value 9 of the sensor on the engine i,ist , since there is typically no direct measurement of the actual drive torque M i,ist torque sensor

Method used

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  • Acceleration-based safety monitoring of a drive of a motor vehicle
  • Acceleration-based safety monitoring of a drive of a motor vehicle
  • Acceleration-based safety monitoring of a drive of a motor vehicle

Examples

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Embodiment Construction

[0037] exist figure 1 Examples of conventional torque-based safety functions described in have been discussed earlier.

[0038] figure 2 An exemplary embodiment of an acceleration-based safety function according to the invention for preventing undesired accelerations is shown. figure 1 and 2 Signals and blocks with the same label in correspond to each other.

[0039] exist figure 2 In the embodiment described in , any arbitrary moment structure 3 can be used in the desired path 1 of the operating function; however, it is preferred to use a moment structure 3 which is treated as the driver desired moment M FW The wheel torque associated with one or more wheels, such as the total torque of all driven wheels (two wheels in standard drive, four wheels in all-wheel drive). for this in image 3 An example is described in . The torque structure 3 includes determining the engagement torque M according to the torque requirement 4 (e.g. based on transmission engagement) kup Th...

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PUM

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Abstract

The present invention relates to an acceleration-based method for safety monitoring of a drive on one hand. In the method a setpoint torque is calculated in a safety function as a function of an accelerator pedal signal representing the position of the accelerator pedal. An expected vehicle acceleration is determined as a function of the setpoint torque, in the safety function. An actual vehicle acceleration is determined, preferably by an acceleration sensor. A fault situation may be detected by comparing the actual vehicle acceleration and the expected vehicle acceleration, for example, the actual vehicle acceleration exceeds the expected vehicle acceleration with a certain value.

Description

technical field [0001] The invention relates to safety monitoring of drives in motor vehicles. Background technique [0002] Vehicles with a digital electronic engine control typically have safety monitoring of the drive in order to detect malfunctions of the drive and initiate corresponding countermeasures. Such fault situations can arise, for example, through faulty calculations of the engine control unit (in particular due to occasional hardware faults) or through sensor faults. [0003] Security monitoring is often used to ensure a variety of different security goals. A safety objective is to prevent acceleration of the vehicle which is not desired by the driver, for example because the desired drive torque deviates significantly from the driver's desire due to a calculation error. [0004] For the engine control of motor vehicles, so-called torque structures, also known as torque control devices, are often used in operating functions. The torque profile processes the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/08B60W30/18
CPCB60W2540/10B60W2520/105B60W2540/12B60Y2300/49B60W10/06Y02T10/48B60W50/0205Y02T10/40
Inventor F·奥斯特雷彻尔J·宾德
Owner BAYERISCHE MOTOREN WERKE AG
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