Method for on-board diagnosis of cold start emissions...

Details Method for on-board diagnosis of cold start emissions... Method for on-board diagnosis of cold start emissions...

2007-02-12

2009-12-08

Cuff, Michael (Department: 3741)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S114750

Reexamination Certificate

active

07630826

ABSTRACT:
A diagnostic cold start emissions control system for an internal combustion engine includes a control module having a calculated engine-out energy module, an engine-out energy residual module, and a diagnostic system evaluation module. The calculated engine-out energy module is in communication with the engine-out energy residual module and is configured to determine an operating engine-out energy flow based on an operating engine torque. The engine-out energy residual module is in communication with the diagnostic system evaluation module and is configured to determine an engine-out energy residual based on the determined engine-out energy flow and an expected engine-out energy flow. The diagnostic system evaluation module is configured to determine whether the determined engine-out energy residual meets a predetermined value indicative of proper cold start emissions control.

REFERENCES:
patent: 4393696 (1983-07-01), Willis et al.
patent: 6871136 (2005-03-01), Wang et al.

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