Development of a New Multi-Mode Variable Valve Timing Engine Mitsubishi Motors Corporation

Format:

Conference/Event

Author/Creator:

Hatano, Kiyoshi, author.

Conference Name:

International Congress & Exposition (1993-03-01 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1993

Summary:

The 4-stroke SI engine offers better performance if its valve events can be varied depending on the operating conditions. Some engines in production are therefore incorporated with variable valve timing (VVT) mechanisms. All of such mechanisms available today however are for two-mode change-over between low-and high-speed operations.To achieve even better output and fuel economy, a new multi-mode VVT mechanism has been developed, featured by a unique hydraulic device for three-mode change-over as follows:This mechanism enables shutting off unnecessary cylinders during low-speed cruise, or select optimum valve events during WOT acceleration over the entire engine speed range. The engine with this VVT demonstrates a fuel economy improvement up 16% during the Japanese test driving cycle and a power increase by 20% from its predecessor

Notes:

Vendor supplied data

Publisher Number:

930878

Access Restriction:

Restricted for use by site license