Controlled Auto Ignition Combustion Process with an Electromechanical Valve Train

Wolters, Peter; Salber, Wolfgang; Geiger, José; Duesmann, Markus; Dilthey, Jochen

doi:10.4271/2003-01-0032

Cited by 58 publications

(15 citation statements)

References 3 publications

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“…Some researchers directly compared the benefits of the NVO and exhaust gas re-breathing methods [15,16]. These researchers concluded that maximum engine loads achieved through the NVO method are lower than those generated via the re-breathing method, due to earlier and faster combustion resulting from higher in-cylinder gas temperatures and charge stratification effects during negative valve overlap.…”

Section: Introductionmentioning

confidence: 97%

Extending the High Load Operating Limit of a Naturally-Aspirated Gasoline HCCI Combustion Engine

Yun¹,

Wermuth²,

Najt³

2010

SAE Int. J. Engines

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Homogenous Charge Compression Ignition (HCCI) combustion offers efficiency improvements compared to conventional gasoline engines. However, due to the nature of HCCI, traditional HCCI combustion can be realized only in a limited operating range. The HCCI operation at high load is limited by excessive combustion noise.In order to maximize the fuel economy benefits of HCCI its operating range needs to be extended to higher loads. In particular, one immediate benefit of an increased load range on the NEDC driving cycle is the avoidance of transitions between SI operation and HCCI operation.In this research a detailed investigation of the fundamental reasons for high combustion noise was performed. Sparkassisted HCCI combustion was found to be a key factor to reduce combustion noise at high load condition. Injection timing for charge cooling, spark timing for the onset of combustion through flame propagation, smaller NVO and higher EGR are the enablers to achieve the appropriate sparkassisted HCCI combustion at high load operation. The high load limit was successfully extended while maintaining good efficiency and complying with emissions regulations.The effect of double injection strategy was also investigated. It is found that even though slight improvement in the tradeoff between combustion noise and combustion stability can be achieved through double injection strategy, fuel consumption is deteriorated due to incomplete combustion.

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Section: Introductionmentioning

confidence: 97%

Extending the High Load Operating Limit of a Naturally-Aspirated Gasoline HCCI Combustion Engine

Yun¹,

Wermuth²,

Najt³

2010

SAE Int. J. Engines

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“…Hot residual gas supplies heat to the combustion chamber and promotes HCCI combustion [1][2][3][4]. This hot residual gas can be controlled by a variable valve timing (VVT) device [5].…”

Section: Transient State Fuel Inductionmentioning

confidence: 99%

Homogenous charge compression ignition (HCCI) engine operating with diesel and bio-diesel using an secondary injector

Sekaran

Mohanamurugan

2011

Proceedings of 2011 International Conference on Electronic &Amp; Mechanical Engineering and Information Technology

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VARIABLE COMPRESSION ratioHomogenous charge compression ignition (HCCI) is a clean and efficient combustion process In this experiment we analyze the performance and emission characteristics of HCCI engine operating in premixed charge compression ignition (PCCI) mode assisted with a secondary pilot injector as combustion initiator located at the inlet manifold. Experiments were conducted in a modified single cylinder water-cooled diesel engine, employing our conceptual system known as transient state fuel induction. Here we use diesel, petrol and bio-diesel (jatropha) as the fuels at different mixing ratios. The engine wear and tear and emissions have also been found decreasing with the use of bio-diesel when compared to vegetable oil. The observations had proved to have increase in brake thermal efficiency with reduced emissions. This research is being conducted both in university and also as a real time experiment in the Southern agro engine private limited, Chennai.

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“…The use of various fuels to control HCCI combustion has been investigated [19e21], including dual fuels [15,20e22], as well as various devices to expand the operating range of HCCI combustion [23,24]. There have been several studies into the effects of dual fuels or fuel additives, because of the low costs of modifying the experimental apparatus that is required.…”

Section: Introductionmentioning

confidence: 99%

The effects of hydrogen addition on the auto-ignition delay of homogeneous primary reference fuel/air mixtures in a rapid compression machine

Chung²,

Lee

et al. 2015

International Journal of Hydrogen Energy

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Controlled Auto Ignition Combustion Process with an Electromechanical Valve Train

Cited by 58 publications

References 3 publications

Extending the High Load Operating Limit of a Naturally-Aspirated Gasoline HCCI Combustion Engine

Extending the High Load Operating Limit of a Naturally-Aspirated Gasoline HCCI Combustion Engine

Homogenous charge compression ignition (HCCI) engine operating with diesel and bio-diesel using an secondary injector

The effects of hydrogen addition on the auto-ignition delay of homogeneous primary reference fuel/air mixtures in a rapid compression machine

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