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Estimation of Residual Exhaust Gas of Homogeneous Charge Compression Ignition Gasoline Engine Operating Under Negative Valve Overlap Strategy

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Abstract

To meet the requirements of the homogeneous charge compression ignition gasoline engine’s rapid cylinder exhaust gas rate and accurate control of combustion phasing, a residual exhaust gas rate model was proposed. A heat dissipation model for gas flow in the exhaust passage and exhaust pipe was established, and the exhaust gas was established. Flow through the exhaust valve was considered as an adiabatic expansion process, the exhaust temperature was used to estimate the temperature in the cylinder at the time that the valve was closed, and the cylinder exhaust gas rate was calculated. To meet the requirements of transient operating conditions, a first-order inertial link was used to correct the thermocouple temperature measurement. Addressing this delay problem and modification of the exhaust wall temperature according to different conditions effectively improved the accuracy of the model. The relative error between the calculated results of this model and the simulation results determined using GT-POWER software was within 3.5%.

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Acknowledgements

Hebei Provincial Science and Technology Research Project (Grant No. Z2015092), Langfang Science and Technology Bureau High-Tech Support Project (Grant No. 2016011018), and Yanjing Institute of Technology Research Project (Grant No. 2017YITSRF105) are thanked for joint funding.

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  1. College of Engineering, Yanjing Institute of Technology, Langfang, 065201, China

    Huanchun Gong

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  1. Huanchun Gong
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Correspondence to Huanchun Gong.

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Gong, H. Estimation of Residual Exhaust Gas of Homogeneous Charge Compression Ignition Gasoline Engine Operating Under Negative Valve Overlap Strategy. Automot. Innov. 2, 45–54 (2019). https://doi.org/10.1007/s42154-019-00048-2

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  • DOI: https://doi.org/10.1007/s42154-019-00048-2

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