Method and apparatus for checking sensors

Details Method and apparatus for checking sensors Method and apparatus for checking sensors

1984-08-06

1986-10-07

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Fuel injection system

123564, 340754, 340715, 340286M, 340 52R, 364571, F02B 300

Patent

active

046153217

ABSTRACT:
A method and apparatus for checking sensors, in which the measurement signals, electrically detected in a checking unit and representative of the operating conditions of an internal combustion engine, are statically monitored. The measurement signals are checked with respect to whether their physical measured values are technically significant and lie within the permissible range and if an error is detected, a measure is initiated which counteracts this error; the cyclically detected measurement signals are thereby checked with respect to a change in their measured values from one sampling cycle to a successive one and are accepted only if the change in measured values is within permissible limits. Stochastic disturbances are gated out of the measurement signal and registered and tolerated up to a significant limit. If faulty measurement signals are detected, an emergency operating procedure is activated which counteracts this fault.

REFERENCES:
patent: 4163224 (1979-07-01), Yasuda
patent: 4274381 (1981-06-01), Abo
patent: 4463355 (1984-07-01), Schultz
patent: 4484290 (1984-11-01), Bagnall
patent: 4531495 (1985-07-01), Yamoto

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