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Transient Control of HCCI Combustion by aid of Variable Valve Timing Through the use of a Engine State Corrected CA50-Controller Combined with an In-Cylinder State Estimator Estimating Lambda
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Maskinkonstruktion (Avd.).
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Maskinkonstruktion (Avd.).
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Maskinkonstruktion (Avd.).ORCID-id: 0000-0002-7550-3134
Visa övriga samt affilieringar
2005 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

One of the main challenges with the Homogeneous Charge Compression Ignition, HCCI, combustion system is to control the Start Of Combustion, SOC, for varying load and external conditions. A method to achieve this on a cycle-by-cycle basis is to vary the valve timing based on a feedback signal from the SOC of previous cycles. The control can be achieved with two basic valve-timing strategies named the Overlap- and the IVC-method. The Overlap-method works by trapping of residuals while the IVC-method affects the effective compression ratio

Ort, förlag, år, upplaga, sidor
2005. Vol. 01-2128
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:kth:diva-6043Scopus ID: 2-s2.0-84877189074OAI: oai:DiVA.org:kth-6043DiVA, id: diva2:10627
Konferens
2005 SAE Brasil Fuels & Lubricants Meeting
Anmärkning
QC 20100629Tillgänglig från: 2006-08-09 Skapad: 2006-08-09 Senast uppdaterad: 2010-07-15Bibliografiskt granskad
Ingår i avhandling
1. Control of HCCI by aid of Variable Valve Timings with Specialization in Usage of a Non-Linear Quasi-Static Compensation
Öppna denna publikation i ny flik eller fönster >>Control of HCCI by aid of Variable Valve Timings with Specialization in Usage of a Non-Linear Quasi-Static Compensation
2006 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

This doctoral thesis is about controlling the combustion timing of the combustion concept Homogeneous Charge Compression Ignition, HCCI, by means of variable valve timings.

The HCCI research usually is regarded to have started in Japan during the later part of the 1970´s. The world of HCCI has since grown and HCCI is of today researched worldwide. Of particular interest from a Swedish point of view is that Lund Institute of Technology has emerged as one of the world leading HCCI laboratories.

The idea with HCCI is to combine the Otto and Diesel engine. As in an Otto engine the charge is premixed but as in a Diesel engine the operation is unthrottled and the compression heat causes the ignition. The combustion that follows the ignition takes place homogeneously and overall lean. The result is ultra low NOx and particulate emissions combined with high total efficiency. A difficulty with the HCCI-concept is that it only works in a narrow area and that there is no direct way to control the Start Of Combustion, SOC. Out of this follows that timing/phasing of the combustion is one of the main difficulties with HCCI combustion concepts. This is particularly emphasized during transient operation and calls for feedback control of the combustion timing.

This work investigates one method, the variable valve timing, to achieve feedback control of the combustion phasing. From the work it can be concluded that the variable valve timing can control the combustion phasing during engine transients. In order to improve the performance a non-linear compensation from ignition delay to valve timings has been suggested, incorporated in a control structure and tested in engine test. The engine test has been performed in a single cylinder engine based on a Scania truck engine. The speed range from 500 to 1750 rpm and the load range 1.26 and 10.5 bar of netIMEP has been covered with fair transient performance.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2006
Serie
Trita-MMK, ISSN 1400-1179 ; 2006:06
Nyckelord
HCCI, Homogeneous, Charge Compression Ignition, Engine Control, Variable Valve Timings
Nationell ämneskategori
Övrig annan teknik
Identifikatorer
urn:nbn:se:kth:diva-4070 (URN)
Disputation
2006-09-04, F3, KTH, Lindstedsvägen 26, Stockholm, 14:00
Opponent
Handledare
Anmärkning
QC 20100629Tillgänglig från: 2006-08-09 Skapad: 2006-08-09 Senast uppdaterad: 2010-06-29Bibliografiskt granskad

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Agrell, FredrikÅngström, Hans-ErikWikander, JanLinderyd, Johan
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