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Mode switch of SI-HCCI combustion on a GDI engine

Tian, G, Wang, Z, Ge, Q, Wang, J and Shuai, S (2007) Mode switch of SI-HCCI combustion on a GDI engine

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Abstract

Multi-mode combustion is an ideal combustion strategy to utilize HCCI for internal combustion engines. It combines HCCI combustion mode for low-middle load and traditional SI mode for high load and high speed. By changing the cam profiles from normal overlap for SI mode to the negative valve overlap (NVO) for HCCI mode, as well as the adjustment of direct injection strategy, the combustion mode transition between SI and HCCI was realized in one engine cycle. By two-step cam switch, the throttle action is separated from the cam action, which ensures the stabilization of mode transition. For validating the feasibility of the stepped switch, the influence of throttle position on HCCI combustion was carefully studied. Based on the research, the combustion mode switch was realized in one engine cycle; the whole switch process including throttle action was realized in 10 cycles. The entire process was smooth, rapid and reliable without any abnormal combustion such as knocking and misfiring. Copyright © 2007 SAE International.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Tian, Gg.tian@surrey.ac.ukUNSPECIFIED
Wang, ZUNSPECIFIEDUNSPECIFIED
Ge, QUNSPECIFIEDUNSPECIFIED
Wang, JUNSPECIFIEDUNSPECIFIED
Shuai, SUNSPECIFIEDUNSPECIFIED
Date : 1 December 2007
Identification Number : https://doi.org/10.4271/2007-01-0195
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:39
Last Modified : 17 May 2017 15:12
URI: http://epubs.surrey.ac.uk/id/eprint/840011

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