A modelling study into the effects of variable valve timing on the gas exchange process and performance of a 4-valve DI homogeneous charge compression ignition (HCCI) engine

Mahrous, Afm; Potrzebowski, A; Wyszyński, Miroslaw L.; Xu, Hongming; Tsolakis, Athanasios; Luszcz, Pawel

doi:10.1016/j.enconman.2008.09.018

Cited by 68 publications

(38 citation statements)

References 6 publications

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“…Fig. 3, from [2], shows the relationship between valve timings and amount of residual. [2], this plot shows simulation results for the novel valve strategy.…”

Section: Novel Valve Strategymentioning

confidence: 98%

“…As mentioned previously in section I, a novel valve strategy proposed by [1] and [2] serves as motivation for the development of this mixing model. A schematic of the novel valve strategy is presented in fig.…”

Section: Novel Valve Strategymentioning

confidence: 99%

“…In later work [2], the authors used the novel valve strategy in an engine simulation to determine the effects of the timings on engine behavior. The authors determined that because of the improved mixing afforded by this valve strategy, the amount of residual exhaust gas that can be used effectively is increased.…”

Section: Novel Valve Strategymentioning

confidence: 99%

“…A strategy presented in [1,2] entails opening the intake valves at different timings to create improved flow characteristics, and therefore better mixing. The advantage of this strategy is the ability to use NVO while avoiding the inherent mixing problems associated with it.…”

Section: Introductionmentioning

confidence: 99%

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Control-oriented mixing model for Homogeneous Charge Compression Ignition engines

McCuen

Sun

Zhu

2010

Proceedings of the 2010 American Control Conference

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A tractable model for in-cylinder fluid motion during the intake stroke is developed with particular attention given to fluid flow through the intake ports. Due to innovations in valve timing strategies for the 4-stroke internal combustion engine, the fluid flow effects of different valve timings must be quantified.An asynchronous valve timing strategy for Homogeneous Charge Compression Ignition engines serves as the motivation for this model development. For the purposes of real-time engine control, the model is not a multi-zone CFD model. Rather, the model divides the cylinder into two zonesa mixed zone and an unmixed zone. The flow is modeled as an intake jet of fluid that determines the rate at which hot exhaust gas is transferred from the unmixed to the mixed zone. The size of the mixed zone at the end of the intake process determines how well the cylinder contents are mixed. The effects of the valve timings on the flow velocity through each intake valve, cylinder pressure, and temperature are also presented.M. J. McCuen is with the Mechanical Engineering Department,

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“…Fig. 3, from [2], shows the relationship between valve timings and amount of residual. [2], this plot shows simulation results for the novel valve strategy.…”

Section: Novel Valve Strategymentioning

confidence: 98%

Section: Novel Valve Strategymentioning

confidence: 99%

Section: Novel Valve Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Control-oriented mixing model for Homogeneous Charge Compression Ignition engines

McCuen

Sun

Zhu

2010

Proceedings of the 2010 American Control Conference

View full text Add to dashboard Cite

show abstract

“…They have seen that the highest indicated mean effective pressure (5 bar) was obtained at k ¼ 5 and 28% EGR ratio. Mahrous et al [28] performed a modeling study to see the effects of valve timing on the gas exchange and performance in HCCI engine. They showed that HCCI operating range became much wider using nontypical valve timing.…”

Section: Introductionmentioning

confidence: 99%