Transient Combustion and Hydrocarbon Emission Characteristics of a Port-Fuel-Injected Engine


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An experimental paltform for simulating the starting process of a PFI engine was set up. The contrastive analysis of prototype engine between conventional start with starting motor and high-speed cranking start with ISG (Integrate Starter/Generator) was carried out. Variation regulation of the transient engine speed, the cylinder pressure, the fuel compensation factor, the intake manifold pressure and the transient HC emission were elaborated. The results show that, with the increase of cranking speed, the intake air pressure dropped, and the intake air quantity reduced as well. The duration of fuel evaporation was shortened, so the fuel atomization was insufficient. The possibility of misfire was increased and the transient HC emission was prominent. All these phenomena had a close relationship with ECT (Engine Coolant Temperature). Fuel compensation in the first few working cycles during starting process could make the original lean mixture more preferable in order to improve the combustion environment.



Advanced Materials Research (Volumes 383-390)

Edited by:

Wu Fan




J. H. Zhou et al., "Transient Combustion and Hydrocarbon Emission Characteristics of a Port-Fuel-Injected Engine", Advanced Materials Research, Vols. 383-390, pp. 5274-5279, 2012

Online since:

November 2011




[1] Henry K. Ng, John A. Anderson, Michael J. Duoba and Robert P. Larsen, Engine Start Characteristics of Two Hybrid Electric Vehicles (HEVs)-Honda Insight and Toyota Prius, SAE Paper, No. 2001-01-2492.


[2] Michael Duoba, Henry K. Ng, Robert P. Larsen, Characterization and Comparison of Two Hybrid Electric Vehicles (HEVs) - Honda Insight and Toyota Prius, SAE Paper, No. 2001-01-1335.


[3] Michael Duoba, Henry K. Ng and Robert P. Larsen, In-Situ Mapping and Analysis of the Toyota Prius HEV Engine, SAE Paper, No. 2000-01-3096.


[4] Naeim A. Henein, Dinu Taraza, Nabil G. Chalhoub Ming-Chia D. Lai and Walter Bryzik, Exploration of the Contribution of the Start/Stop Transients in HEV Operation and Emissions, SAE Paper, No. 2000-01-3086.


[5] Daniel Klein. Wai K. Cheng. Spark Ignition Engine Hydrocarbon Emission Behaviors in Stopping and Restarting, SAE paper, 2002-01-(2084).


[6] Per-Anders Carlsson, Magnus Skoglundh, Erik Fridell, Edward Jobson, Bengt Andersson, Induced low temperature catalytic ignition by transient changes in the gas composition, Catalysis Today, 2002, 73: 307-313.


[7] Shui Yu, Liguang Li, Guangyu Dong and Xusheng Zhang, A Study of Control Strategies of PFI Engine during Cranking and Start for HEVs, Vehicular Electronics and Safety, 2006. ICVES 2006. IEEE International Conference on : 68-72.


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