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Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/4419

Title: Investigation of transition between spark ignition and controlled auto-ignition combustion in a V6 direct-injection engine with cam profile switching
Authors: Kalian, N
Zhao, H
Qiao, J
Keywords: HCCI-SI
CAI
Mam profile switching
Transition
Publication Date: 2008
Publisher: Professional Engineering Publishing
Citation: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 222(10): 1911-1926
Abstract: Controlled auto-ignition (CAI) combustion, also known as Homogeneous Charge Compression Ignition (HCCI) can be achieved by trapping residuals with early exhaust valve closure in a direct fuel injection in-cylinder four-stroke gasoline engines (through the employment of low-lift cam profiles). Due to the operating region being limited to low and mid-load operation for CAI combustion with a low-lift cam profile, it is important to be able to operate SI combustion at high-load with a normal cam profile. A 3.0L prototype engine was modified to achieve CAI combustion, using a Cam Profile Switching mechanism which has the capability to switch between high and low-lift cam-profiles. A strategy was used where a high-profile could be used for SI combustion and a low-lift profile was used for CAI combustion. Initial analysis showed that for transitioning from SI to CAI combustion, misfire occurred on the first CAI transitional cycle. Subsequent experiments showed that the throttle opening position and switching time could be controlled avoiding misfire. Further work investigated transitioning at different loads and from CAI to SI combustion.
URI: http://bura.brunel.ac.uk/handle/2438/4419
DOI: http://dx.doi.org/10.1243/09544070JAUTO846
ISSN: 0954-4070
Appears in Collections:School of Engineering and Design Research papers
Mechanical Engineering

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