Airless In-Line Adsorber System for Reducing Cold Start HC Emissions

1998 ◽  
Author(s):  
M. D. Patil ◽  
Y. Lisa Peng ◽  
Kathleen E. Morse
Keyword(s):  
Cold Start ◽  
Hc Emissions

Early Model-Based Design and Verification of Automotive Control System Software Implementations

2014 ◽  
Vol 137 (2) ◽  
Author(s):  
Mahdi Shahbakhti ◽  
Mohammad Reza Amini ◽  
Jimmy Li ◽  
Satoshi Asami ◽  
J. Karl Hedrick
Keyword(s):  
Controller Design ◽  
Combustion Engine ◽  
Control Unit ◽  
Cold Start ◽  
Early Model ◽  
Automotive Control ◽  
Model Based ◽  
Numerical Noise ◽  
Software Implementations ◽  
Hc Emissions

Verification and validation (V&V) are essential stages in the design cycle of automotive controllers to remove the gap between the designed and implemented controller. In this paper, an early model-based methodology is proposed to reduce the V&V time and improve the robustness of the designed controllers. The application of the proposed methodology is demonstrated on a cold start emission control problem in a midsize passenger car. A nonlinear reduced order model-based controller based on singular perturbation approximation (SPA) is designed to reduce cold start hydrocarbon (HC) emissions from a spark ignition (SI) combustion engine. A model-based simulation platform is created to verify the controller robustness against sampling, quantization, and fixed-point arithmetic imprecision. In addition, the results from early model-based verification are used to identify and remove sources of errors causing propagation of numerical imprecision in the controller structure. Thus the structure of the controller is modified to avoid or to reduce the level of numerical noise in the controller design. The performance of the final modified controller is validated in real-time by testing the control algorithm on a real engine control unit. The validation results indicate the modified controller is 17–63% more robust to different implementation imprecision while it requires lower implementation cost. The proposed methodology from this paper is expected to reduce typical V&V efforts in the development of automotive controllers.

scholarly journals Exhaust gas treatment for reducing cold start emissions of a motorcycle engine fuelled with gasoline-ethanol blends

2017 ◽  
Vol 26 (2) ◽  
pp. 84 ◽  
Author(s):  
A. Samuel Raja ◽  
A. Valan Arasu
Keyword(s):  
Traffic Congestion ◽  
Catalytic Converter ◽  
Cold Start ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Gas Treatment ◽  
Single Cylinder ◽  
Hc Emissions ◽  
Ethanol Blends ◽  
Exhaust Gas Temperature

In countries like India, transportation by a two wheeled motorcycle is very common owing to affordable cost, easy handling and traffic congestion. Most of these bikes use single cylinder air cooled four-stroke spark ignition (SI) engines of displacement volume ranging from 100 cm3 to 250 cm3. CO and HC emissions from such engines when started after a minimum stop-time of 12 hours or more (cold-start emissions) are higher than warmed-up emissions. In the present study, a 150 cm3 single cylinder air cooled SI engine was tested for cold start emissions and exhaust gas temperature. Different gasoline-ethanol blends (E0 to E20) were used as fuel expecting better oxidation of HC and CO emissions with additional oxygen present in ethanol. The effect of glow plug assisted exhaust gas ignition (EGI) and use of catalytic converter on cold start emissions were studied separately using the same blends. Results show that with gasoline-ethanol blends, cold start CO and HC emissions were less than that with neat gasoline. And at an ambient temperature of 30±1°C, highest emission reductions were observed with E10. EGI without a catalytic converter had no significant effect on emissions except increasing the exhaust gas temperature. The catalytic converter was found to be active only after 120 seconds in converting cold start CO, HC and NOx. Use of a catalytic converter proves to be a better option than EGI in controlling cold start emissions with neat gasoline or gasoline-ethanol blends.

Condensation of Fuel on Combustion Chamber Surfaces as a Mechanism for Increased HC Emissions from SI Engines During Cold Start

1997 ◽  
Author(s):  
Rudolf H. Stanglmaier ◽  
Charles E. Roberts ◽  
Ofodike A. Ezekoye ◽  
Ronald D. Matthews
Keyword(s):  
Combustion Chamber ◽  
Cold Start ◽  
Si Engines ◽  
Hc Emissions

Performance and Hydrocarbon (HC) Emissions from a Spark-Ignition Liquefied Petroleum Gas (LPG) Engine during Cold Start

2009 ◽  
Vol 23 (9) ◽  
pp. 4337-4342 ◽  
Author(s):  
Jun Li ◽  
Changming Gong ◽  
Yan Su ◽  
Huili Dou ◽  
Xunjun Liu
Keyword(s):  
Cold Start ◽  
Spark Ignition ◽  
Liquefied Petroleum Gas ◽  
Hc Emissions

Reactive Calcination Route for Synthesis of Highly Active NiCo2O4 Catalyst for Abatement of Cold-Start CO–HC Emissions from LPG Vehicles

2017 ◽  
Vol 147 (9) ◽  
pp. 2385-2398 ◽  
Author(s):  
Pratichi Singh ◽  
Deepak Yadav ◽  
J. Pandey ◽  
R. Prasad
Keyword(s):  
Cold Start ◽  
Highly Active ◽  
Hc Emissions

Cycle-by-Cycle Analysis of HC Emissions During Cold Start of Gasoline Engines

1995 ◽  
Author(s):  
N.A. Henein ◽  
M.K. Tagomori ◽  
M.K. Yassine ◽  
T.W. Asmus ◽  
C.P. Thomas ◽  
...  
Keyword(s):  
Cold Start ◽  
Gasoline Engines ◽  
Hc Emissions
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