Safety concept in electronic throttle control of internal...

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration

Reexamination Certificate

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C701S029000, C701S101000, C123S399000

Reexamination Certificate

active

07970524

ABSTRACT:
In a method for monitoring a function computer in a control unit which controls the generation of torque by an internal combustion engine, a maximum acceptable torque value is determined from a driver request. A torque actual value is determined from operational characteristic variables of the internal combustion engine and is compared with the maximum acceptable value. The air supply is limited when there is an unacceptably large actual value. The method is distinguished by the fact that the limitation takes place when a fault counter reading exceeds a threshold value. The fault counter reading is increased if the torque actual value is higher than the maximum acceptable torque value and is reduced by a predetermined value if the torque actual value is lower than the maximum acceptable value. In addition, a control unit which is configured to carry out the method is presented.

REFERENCES:
patent: 5880568 (1999-03-01), Bederna et al.
patent: 6251044 (2001-06-01), Streib
patent: 6305347 (2001-10-01), Russell
patent: 2007/0051334 (2007-03-01), Juenemann et al.
patent: 2009/0078235 (2009-03-01), Moriya et al.
patent: 44 38 714 (1996-05-01), None
patent: 198 36 845 (2000-02-01), None
patent: 101 05 507 (2001-10-01), None
Robert Bosch GmbH, “Ottomotor-Management”, Oct. 2005, p. 241.

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