Security for engine torque input air-per-cylinder calculations

Details Security for engine torque input air-per-cylinder calculations Security for engine torque input air-per-cylinder calculations

2008-10-21

2011-11-01

Badii, Behrang (Department: 3667)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Indication or control of braking, acceleration, or deceleration

C701S103000, C701S115000, C123S399000, C123S090170, C123S090150, C123S090310

Reexamination Certificate

active

08050841

ABSTRACT:
An air-per-cylinder (APC) security system for a vehicle comprises an APC determination module, an APC threshold determination module, and an APC diagnostic module. The APC determination module determines first and second APC values for first and second cylinders of an engine, respectively, based on mass airflow (MAF) into the engine. The APC threshold determination module determines an APC threshold based on the first APC value and a spark timing for the first cylinder. The APC diagnostic module selectively diagnoses a fault in the APC determination module when the second APC value is greater than a sum of the first APC value and the APC threshold.

REFERENCES:
patent: 2009/0118968 (2009-05-01), Livshiz et al.

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