Title: State of development of a simple procedure to control the exhaust emission of vehicles in use

Authors: P.-F. Kuper, D.O. Gruden

Addresses: F. Porsche AG, R&D Centre, Weissach, Federal Republic of Germany. ' F. Porsche AG, R&D Centre, Weissach, Federal Republic of Germany

Abstract: Information is given about the state of development of the |no-load| test, a simple procedure to control the exhaust emission of vehicles in use. The no-load test serves to verify the ignition and mixture control system, i.e.: The ignition system by controlling the ignition timing. The mixture control system by determining the CO and CO2 concentration in two zero-load points: idling at the engine speed specified by the manufacturer; idling at increased engine speed. A prerequisite for doing this is the knowledge of the vehicle-type specific CO and CO2 exhaust concentration limits and the ignition timing characteristic. The proposed no-load test is particularly suited for determining vehicles with high exhaust emissions. It provides sufficiently precise statements on the functioning and required adjustments of the ignition and mixture control systems such that control of the exhaust emissions of vehicles in use seems to be feasible.

Keywords: vehicle design; short test; component control; no-load test; exhaust emissions; emission control.

DOI: 10.1504/IJVD.1983.061294

International Journal of Vehicle Design, 1983 Vol.4 No.1, pp.3 - 12

Published online: 25 May 2014 *

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