Transition Quality Between Spark Ignition and Homogeneous Charge Compression Ignition Modes Using Two Different VVT Strategies : Cam Profile Switching and Phasing Strategy vs Fully Variable Valve Train Strategy
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20055406
- Paper/Info type
- Proceedings (Spring)
No.33-05
- Pages
- 19-24(Total 6 p)
- Date of publication
- May 2005
- Publisher
- JSAE
- Language
- English
Detailed Information
| Author(E) | 1) N.Milovanovic, 2) D.W.Blundell, 3) J.W.G.Turner |
|---|---|
| Affiliation(E) | 1) Lotus Engineering, 2) Lotus Engineering, 3) Lotus Engineering |
| Abstract(E) | In a future 'hybrid' mode internal combustion engine capable of running in spark ignition (SI) and Homogeneous Charge Compression Ignition (HCCI) modes, transition between these modes, during changes in engine load and speed, will play a crucial role. The valve train and engine management system must provide a fast and smooth transition between these two very different combustion modes keeping all relevant engine and combustion parameters in an acceptable range. To accommodate such transition a valve event (comprising duration, timing and lift) has to be variable, which consequently leads to high demands on the valve train and therefore a need for a high degree of flexibility. Two valve train concepts, one a Cam Profile Switching (CPS) and phaser system, and the other Fully Variable (Lotus AVTTM) are presented. The use of both concepts for transitions from SI to HCCI to SI are experimentally investigated on a single cylinder research engine fuelled with commercially available gasoline fuel. Experimental results obtained together with benefits and obstacles in using each of these strategies are presented and discussed. Key words: HCCI, Transition, Fully Variable Valve Train, CPS and Phasers |
