Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Patent
1996-12-04
1999-11-30
Cuchlinski, Jr., William A.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
731173, G06F 1130
Patent
active
059958855
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
A method of this kind and an arrangement of this kind is known from DE-OS 36 21 937 (U.S. Pat. No. 5,107,427). There, for fault detection in the area of measured-value detection of an electronic power control, the operating variable of the power control which is detected by a measuring device is influenced. Especially faults in the A/D interfaces or in the channels of a multiplexed A/D converter of the electronic control unit of the power control system can be detected. This fault detection takes place by switching off the ground lead of the position transducer of an accelerator pedal and/or of a throttle flap by means of a switch element actuated by the computing element of the control unit. The position transducer is configured as a potentiometer. If the measured variable detected by the measuring device in the switched-off state exceeds pregiven limit values or limit values derived from the read-in supply voltage of the measuring device, a fault state is recognized.
In several applications, it has been shown that this procedure is not always satisfactory. A control variable of the power control is changed during monitoring. Accordingly, this power control cannot be carried out during the monitoring time.
Furthermore, it has been shown that the monitoring procedure, as a consequence of tolerances in the region of the switching element, the measuring devices as well as the input lines to the control unit, takes considerable time during which the electronic control cannot be carried out (in the range of several 100 milliseconds). Furthermore, additional circuit measures in the area of the switch element are necessary especially with a view toward the resistance to short circuits of the switch element to the battery or supply voltage.
SUMMARY OF THE INVENTION
It is an object of the invention to provide measures which make possible a monitoring of the measured value detection as precise as possible without the occurrence of additional difficulties in the area of the circuitry. The monitoring does not or only slightly influences the power control.
A method or an arrangement for monitoring the detection of measured values of an electronic control apparatus is likewise known from DE-OS 42 04 623. Here too, the ground line of a measuring device for detecting an accelerator pedal position or a throttle flap position is interrupted by a computer element via a switch element. Since, in this case, it is not the measuring device, which determines a command variable of the power control, but a redundant measuring device which forms the basis, the problem with respect to precision or quickness and with respect to the interruption of the power control does not occur to the above extent. Additional switching measures for ensuring the operability must, however, also be provided here.
Finally, in European patent publication 0,354,269 A1, a method and a circuit arrangement for monitoring the transfer resistance of a potentiometer are suggested. There, at predetermined time points, the signal line level is switched via a switching element to ground at predetermined time points by a computer element of the electronic power control and, from the variables available in the computing element, with respect to potentiometer position, voltage in the switched-on state as well as the supply voltage, the actual transfer resistance of the potentiometer is computed. Measures for monitoring the detection of measured values are not described so that a fault state in the area of the A/D converter of the computing element leads to a defective operation of the power control.
With the procedure of the invention for monitoring the detection of measured values for a electronic power control of a motor of a vehicle, additional difficulties in the circuit configuration are avoided and a comprehensive monitoring is nonetheless ensured.
It is especially advantageous that a signal outputted by the computer operates directly on at least one of its input channels, influencing the command variable is unnecessary and no a
REFERENCES:
patent: 4497057 (1985-01-01), Kato et al.
patent: 4546646 (1985-10-01), Takahashi
patent: 4862364 (1989-08-01), Matsuda
patent: 4899130 (1990-02-01), Rossberg
patent: 5107427 (1992-04-01), Peter et al.
patent: 5167212 (1992-12-01), Peter et al.
patent: 5207091 (1993-05-01), Shibata et al.
patent: 5365438 (1994-11-01), Mitchell et al.
patent: 5375056 (1994-12-01), Nitschke et al.
patent: 5381334 (1995-01-01), Furui
patent: 5515027 (1996-05-01), Billig et al.
patent: 5590040 (1996-12-01), Abe et al.
Bederna Frank
Haag Wolfgang
Muller Margit
Pfeufer Reinhard
Cuchlinski Jr. William A.
Donnelly Arthur D.
Ottesen Walter
Robert & Bosch GmbH
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