Study of SI-HCCI-SI Transition on a Port Fuel Injection Engine Equipped with 4VVAS State Key Laboratory of Engines, Tianjin University

Format:

Conference/Event

Author/Creator:

Zhang, Yan, author.

Conference Name:

SAE World Congress & Exhibition (2007-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

A strategy to actualize the dual-mode (SI mode and HCCI mode) operation of gasoline engine was investigated. The 4VVAS (4 variable valve actuating system), capable of independently controlling the intake and exhaust valve lifts and timings, was incorporated into a specially designed cylinder head for a single cylinder research engine and a 4VVAS-HCCI gasoline engine test bench was established. The experimental research was carried out to study the dynamic control strategies for transitions between HCCI and SI modes on the HCCI operating boundaries.Results show that equipped with the 4VVAS cylinder head, the engine can be operated in HCCI or SI mode to meet the demands of different operating conditions. 4VVAS enables the rapid and effective control over the in-cylinder residual gas, and therefore dynamic transitions between HCCI and SI can be stably achieved. It is easier to achieve transition from HCCI to SI than reversely due to the influence of thermo-inertia. Two major approaches can be applied to controlling the HCCI-SI transitions, which are the dynamic management of residual gas and the design of hybrid heat release rate curve

Notes:

Vendor supplied data

Publisher Number:

2007-01-0199

Access Restriction:

Restricted for use by site license