This content is not included in your SAE MOBILUS subscription, or you are not logged in.
HCCI Combustion on a Diesel VCR Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2008 by SAE International in United States
Annotation ability available
A variable compression ratio (VCR) technology, that has a new piston-crankshaft mechanism with multi links, has been patented and developed by Nissan for some years (This technology has been detailed in previous SAE paper 2003-01-0921 and 2005-01-1134).
This paper will present the use of this VCR technology for Diesel engine. The objective set with the use of VCR for Diesel engine is mainly to reduce as much as possible engine out emission to prepare for long-term, more strict emission standards.
Results presented will include the description of the 2l Diesel VCR engine and its VCR mechanism adapted to Diesel constraints. Combustion tests have been performed with the use of HCCI (Homogeneous Charge Compression Ignition) combustion. This technology is still in a research phase in Renault: the adaptation of VCR technology to a Diesel engine consists in the modification of several parts with the addition of lower links, control links and control shaft.
The presentation of test results will explain how the HCCI combustion used in relation with a dedicated VCR mechanism control strategy allows reducing engine out emissions. An optimized compression ratio map function of engine speed and load is also detailed. The control of the variation of the compression ratio is not described in the paper.
|Technical Paper||The Effect of a Longer Stroke on Improving Fuel Economy of a Multiple-Link VCR Engine|
|Technical Paper||Compact and Long-Stroke Multiple-Link VCR Engine Mechanism|
|Technical Paper||A New Cylinder Deactivation by FEV and Mahle|
CitationGérard, D., Besson, M., Hardy, J., Croguennec, S. et al., "HCCI Combustion on a Diesel VCR Engine," SAE Technical Paper 2008-01-1187, 2008, https://doi.org/10.4271/2008-01-1187.
- Moteki K., Aoyama S., Ushijima K., Hiyoshi R., Takemura S., Fujimoto H., Aria T. “A study of a variable compression ratio system with a multi-link mechanism.” SAE 2003 congress (2003-01-0921)
- Takahashi N., Aoyama S., Moteki K., Hiyoshi R. “A study concerning the noise and vibration characteristics of an engine with multiple-link variable compression ratio system.” SAE 2005 congress (2005-01-1134)
- Hiyoshi R., Aoyama S., Takemura S., Ushijima K., Sugiyama T. “A study of a multiple link variable compression ratio system for improving engine performances.” SAE 2006 congress (2006-01-0616)
- Coma G., Gastaldi P., Hardy JP., Maroteaux D. “HCCI combustion: dream or reality?” Aachen Kolloquium Fahrzeug -und Motorentechnik 2004
- Coma G., Gastaldi P., Hardy JP. “HCCI: risks and potentialities.” Essen colloquium
- Shusi K, Osamu A, Yasuhisa K and Eiji A. Ultra Clean Combustion Technology Combining a Low Temperature and Premixed Combustion Concept for meeting Future Emission Standards. SAE paper (2001-01-0200).
- FEV: private communication.
- Walter B and Gatellier B “Development of the High Power NADI Concept using Dual Mode Diesel Combustion to achieve Zero NOx and Particulate Emissions” SAE 2002 Congress (2002-01-1744).