TOTAL GAS/EFFECTIVE FUEL RATIO PREDICTS COAST SURGE IN EMISSION-CONTROL VEHICLES
In the course of developing a low-emission manual transmission vehicle, coast surge in the fore-and-aft direction resulting from the installation of certain emission-control devices was sometimes experienced immediately after the initiation of vehicle deceleration. The investigation revealed that this vehicle surge was caused by combustion irregularities in a sequence of combustion-misfire-intense combustion events occurring every several cycles. A new combustibility standard, defined as the ratio of total cylinder mixture weight to effective fuel weight was found to predict combustibility and irregular combustion over the entire mixture range. As a results, driveability during deceleration was improved by modifying key emission-control components.
- From SAE Meeting held June 9-13, 1980.
Warrendale, PA USA 15096
- Nagumo, S
- NAKAJIMA, Y
- Hase, Y
- Publication Date: 1980-6
- Features: References;
- Pagination: 16 p.
- Society of Automotive Engineers Preprint
- Publisher: Society of Automotive Engineers
- TRT Terms: Air quality management; Automobiles; Combustion; Emission control systems; Exhaust gases; Fuel air mixtures; Fuels; Motor vehicles; Performance; Standards; Transmissions; Vehicle performance; Vehicle power plants; Vehicles
- Uncontrolled Terms: Air fuel ratio
- Old TRIS Terms: Automobile engines; Coast surge; Emission control vehicles; Exhaust emission control
- Subject Areas: Energy; Highways; Vehicles and Equipment;
- Accession Number: 00331774
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: SAE 800827
- Files: TRIS
- Created Date: Jul 9 1981 12:00AM