Novel application-oriented transient fuel model of a port fuel injection S. I. engine

Wang, Cunlei; Zhang, Jianlong; Yin, Chengliang

doi:10.3901/cjme.2014.02.348

Cited by 3 publications

(2 citation statements)

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“…The ideal intake charge of a cylinder under standard condition (pressure =101.3KPa, temperature = 0°C) is: (3) According to the definition, the relative intake charge of cylinder is: (4) At the intake valve closing (IVC), the intake manifold pressure and the in-cylinder pressure can be treated as balance, namely:…”

Section: Non-dimensional Pneumatic Modelmentioning

confidence: 99%

“…During accelerate process, since the actual intake air mass increases rapidly ,the calculated intake air mass is less than the actual intake air mass, causing a lean mixture; During decelerate process , since the actual intake air mass drops rapidly, the calculated intake air mass is greater than the actual intake air mass, resulting in a rich mixture, as in [3].…”

Section: Introductionmentioning

confidence: 99%

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Transient Fuel-Film Compensation Strategy of PFI Gasoline Engine Based on Combined Film Model

Huang

Chen

2016

MATEC Web Conf.

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Abstract. For port-injected gasoline engines, an innovative strategy of transient fuel-film compensation is proposed to eliminate the impact of fuel-film dynamic effects and improve the transient air fuel ratio control accuracy. A combined fuel-film model composes of a long-term fuel-film and a short-term fuel-film was established. A transient fuel-film compensator model was analyzed in detail. The respective term of the fuel-film model is calculated by a share factor. The decay coefficients control the fuel compensation quantity and the active time. The validity of above models were verified though engine bench tests. The results show that this new strategy can effectively suppress the λ offset during engine transient condition, the transient lambda deviation is less than 5% and stabilized within 1 second.

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Section: Non-dimensional Pneumatic Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%