Diagnostic method and arrangement for quantitatively checking ac

Details Diagnostic method and arrangement for quantitatively checking ac Diagnostic method and arrangement for quantitatively checking ac

1987-07-17

1989-01-03

Levy, Stewart J.

Measuring and testing

Vehicle chassis

Steering

731181, G01M 1900

Patent

active

047947900

ABSTRACT:
A diagnostic method and arrangement quantitatively checks actuators during the open-loop and/or closed-loop control of operational parameters of an internal combustion engine. The method and arrangement checks the idle actuator and the tank venting value well as the associated hardward chains, that increased or decreased quantities of air (.+-..DELTA.Q.sub.TEV/LLR) be supplied via an appropriate controlling to the tank-venting valve or of the idle regulator, preferbly simultaneously and in opposite directions and that the resulting possible changes of rotational speed (rotational speed remains constant; rotational speed decreases; rotational speed increases) be determined and appropriately evaluated.

REFERENCES:
patent: 4402217 (1983-09-01), Higashiyama

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