Method and device for controlling a vehicle drive unit
First Claim
1. A method for controlling a drive unit of a vehicle, the method comprising the steps of:
- providing a microcomputer for controlling the power of the drive unit via first programs in dependence upon operating variables of the drive unit and of the vehicle and for monitoring this power control via second programs on the basis of selected operating variables in accordance with a monitoring function;
providing a monitoring module for issuing a test signal to permit said microcomputer to monitor the operability of said monitoring function;
utilizing said microcomputer to compute said monitoring function in accordance with said test signal on the basis of selected test data with said microcomputer determining at least one result of said monitoring function; and
,transmitting said at least one result to said monitoring module for checking the accuracy thereof.
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Accused Products
Abstract
A method and an arrangement for controlling a drive unit of a vehicle are suggested. In this method, the control functions for the power of the drive unit and the monitoring of these control functions are carried out by a single microcomputer. A monitoring module, which is separate from the microcomputer, is provided for checking the monitoring functions. The monitoring module transmits test signals to the microcomputer at a given time. The microcomputer then computes the monitoring function on the basis of test data. The result of the computation is transmitted to the monitoring module which checks the operability of the monitoring function in the microcomputer by making a comparison to stored values.
35 Citations
11 Claims
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1. A method for controlling a drive unit of a vehicle, the method comprising the steps of:
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providing a microcomputer for controlling the power of the drive unit via first programs in dependence upon operating variables of the drive unit and of the vehicle and for monitoring this power control via second programs on the basis of selected operating variables in accordance with a monitoring function; providing a monitoring module for issuing a test signal to permit said microcomputer to monitor the operability of said monitoring function; utilizing said microcomputer to compute said monitoring function in accordance with said test signal on the basis of selected test data with said microcomputer determining at least one result of said monitoring function; and
,transmitting said at least one result to said monitoring module for checking the accuracy thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An arrangement for controlling a drive unit of a vehicle, the arrangement comprising:
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a microcomputer for controlling the power of the drive unit via first programs in dependence upon operating variables of the drive unit and of the vehicle and monitoring execution of said first programs via second programs on the basis of selected operating variables; a monitoring module for issuing a test signal to permit said microcomputer to monitor the operability of said monitoring function; said microcomputer being programmed to compute said monitoring function in accordance with said test signal on the basis of selected test data with said microcomputer determining at least one result of said monitoring function; and
,means for transmitting said at least one result to said monitoring module for checking the accuracy thereof.
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Specification