Method for establishing malfunctions of components of a motor vehicle power train
First Claim
1. A method of detecting a malfunctioning drive train component of a motor vehicle and implementing an emergency operation in view of the malfunctioning drive train component, the drive train including a drive motor having a motor control device and a drive motor output shaft and an automatic transmission having a transmission control device, a transmission setting apparatus, a plurality of transmission sensors, and a transmission input shaft having a transmission input shaft torque sensor for measuring values of input torque on the transmission input shaft, the drive motor output shaft being indirectly connected, via a further drive train element, to the transmission input shaft, the method comprising the steps of:
- recording, via a data transmission apparatus and during operation of the motor vehicle, function data of the drive motor, the motor control device and the automatic transmission, the transmission control device, the transmission setting apparatus, the plurality of transmission sensors, and the transmission input shaft having the transmission input shaft torque sensor and actual measurement values of the input torque on the transmission input shaft;
calculating an output torque of the drive motor output shaft using the function data of the drive motor, the motor control device and the automatic transmission, the transmission control device, the transmission setting apparatus, the plurality of transmission sensors, and the transmission input shaft having the transmission input shaft torque sensor;
comparing the calculated output torque of the drive motor output shaft with the actual measurement values of the input torque of the transmission input shaft and concluding that at least one of the drive motor, the motor control device and the automatic transmission, the transmission control device, the transmission selling apparatus, the plurality of transmission sensors and the data transmission apparatus has failed if an impermissibly high deviation exists between the calculated output torque from the drive motor and the actual measurement values of the input torque on the transmission input shaft which is indirectly connected to the drive motor output shaft; and
initialing an emergency type operation of at least one of the drive motor, the motor control device and the automatic transmission, the transmission control device when a failure is concluded such that the motor vehicle can be at least temporarily safely operated.
1 Assignment
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Accused Products
Abstract
A method for establishing malfunctions of components of a motor vehicle power train as well as the reaction to the same. The power train has a drive motor and an automatic transmission with respectively allocated control devices, setting apparatus and sensors, and the transmission input shaft is allocated a torque sensor for recording the transmission input shaft. During operation of the motor vehicle, the functions of the control devices, the operating elements, the sensors and their data transmission apparatus as well as the measured values of the transmission input torque are recorded and checked for signs of malfunction. After recognizing such a malfunction, operations are conducted by means of which the motor vehicle can be further operated in an emergency type of operation or with the aid of which the driving operation can be safely ended.
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Citations
17 Claims
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1. A method of detecting a malfunctioning drive train component of a motor vehicle and implementing an emergency operation in view of the malfunctioning drive train component, the drive train including a drive motor having a motor control device and a drive motor output shaft and an automatic transmission having a transmission control device, a transmission setting apparatus, a plurality of transmission sensors, and a transmission input shaft having a transmission input shaft torque sensor for measuring values of input torque on the transmission input shaft, the drive motor output shaft being indirectly connected, via a further drive train element, to the transmission input shaft, the method comprising the steps of:
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recording, via a data transmission apparatus and during operation of the motor vehicle, function data of the drive motor, the motor control device and the automatic transmission, the transmission control device, the transmission setting apparatus, the plurality of transmission sensors, and the transmission input shaft having the transmission input shaft torque sensor and actual measurement values of the input torque on the transmission input shaft; calculating an output torque of the drive motor output shaft using the function data of the drive motor, the motor control device and the automatic transmission, the transmission control device, the transmission setting apparatus, the plurality of transmission sensors, and the transmission input shaft having the transmission input shaft torque sensor; comparing the calculated output torque of the drive motor output shaft with the actual measurement values of the input torque of the transmission input shaft and concluding that at least one of the drive motor, the motor control device and the automatic transmission, the transmission control device, the transmission selling apparatus, the plurality of transmission sensors and the data transmission apparatus has failed if an impermissibly high deviation exists between the calculated output torque from the drive motor and the actual measurement values of the input torque on the transmission input shaft which is indirectly connected to the drive motor output shaft; and initialing an emergency type operation of at least one of the drive motor, the motor control device and the automatic transmission, the transmission control device when a failure is concluded such that the motor vehicle can be at least temporarily safely operated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for determining a malfunction of at least one automotive drive train component and a reaction to the malfunction of the at least one drive train component, the drive train comprising a drive engine with a drive output shaft, a mechanical element and an automatic transmission having a transmission input shaft, the mechanical element being located between the drive engine and the transmission such that the drive output shaft is indirectly connected to the transmission input shaft, each having a control device, actuators, sensors, a data transmission system, and the functions of the control devices, the actuators, the sensors and the data transmission systems of each of the drive engine and the automatic transmission being recorded and checked for signs of malfunction during driving operations, and an emergency operating mode being activated when a malfunction occurs, the method comprising the steps of:
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measuring a transmission input torque of the transmission input shaft, via an input shaft torque sensor, and the functions of the control devices, the actuators, the sensors, and a torque of the transmission input shaft being sensed, measured and checked for signs of malfunction during the driving operation; communicating and checking the measured transmission input torque to the engine control unit for at least one of plausibility and correctness; implementing process steps upon recognition of a malfunction to either continue safe operation of the vehicle in the emergency operating mode, or safely end operation of the vehicle. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification