A proposed experiment of valve train system for cylinder deactivation in si engines
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datlv@hcmute.edu.vnKeywords:
cylinder deactivation (CDA), engine load, valve train system, emissions, fuel consumptionAbstract
The research development and application of new technologies is a trend of many automobile manufacturers in the world to ensure the most economical use of fossil fuel resources and reduce environmental pollution. The optimal status of driving torque at different operating conditions can improve the fuel consumption in engines. This is performed by cylinder deactivation method that brings back many advantages in improving emissions and fuel consumption at various load ranges in SI engines. The study proposes a design valve train, which is improved from the conventional valve train system in an inline SI engine with 4 cylinders, to control cylinder deactivation. In the proposed design, one or two cylinders are deactivated depending on part or medium loads in vehicle.
The results show that cylinder deactivation can reduce about 13% to 15% of fuel consumption compared with the conventional engine. The concentration of CO reduces about 15%, whereas HC decreases about 8% when SI engine operates with different cylinder deactivation modes.
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References
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