This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Air-Fuel Ratio and Ignition Timing Retard Control Using a Crank Angle Sensor for Reducing Cold Start HC
Technical Paper
2009-01-0588
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Emission regulations continue to be strengthened, and it is important to decrease cold start hydrocarbon concentrations in order to meet them, now and in the future. The HC concentration in engine exhaust gas is reduced by controlling the air-fuel ratio to the low HC range and retarding the ignition timing as much as possible until the engine stability reaches a certain deterioration level. Conventionally however, the target air-fuel ratio has been set at a richer range than the low HC range and the target ignition timing has been more advanced than the engine stability limit, in order to stabilize the engine for various disturbances. As a result, the HC concentration has not been minimized. To solve this problem, a new engine control has been developed. This control uses a crank angle sensor to simultaneously control the air-fuel ratio and the ignition timing so that the HC concentration can be minimized. The experimental results show the HC accumulated in the first 20 seconds after the engine start was reduced by up to 37%.
Recommended Content
Journal Article | Low-Cost Air Estimation |
Technical Paper | Electronic Control of Air-Fuel Ratios in a Carburator for Two-Wheeler Application |
Technical Paper | Application of a Portable FTIR for Measuring On-road Emissions |
Authors
Citation
Nakagawa, S., Ichihara, T., Katogi, K., Kanetoshi, K. et al., "An Air-Fuel Ratio and Ignition Timing Retard Control Using a Crank Angle Sensor for Reducing Cold Start HC," SAE Technical Paper 2009-01-0588, 2009, https://doi.org/10.4271/2009-01-0588.Also In
References
- Oguma H. et al. “Development of Third Generation of Gasoline P-ZEV Technology” SAE 2003-01-0816 2003
- Kidokoro T. et al. “Development of PZEV Exhaust Emission Control System” SAE 2003-01-0817 2003
- Nakagawa S. et al. “Cold Start HC Reduction with Feedback Control Using a Crank Angle Sensor” SAE 2008-01-1010 2008