A Newly Developed Variable Valving Mechanism with Low-Mechanical Friction Subaru Research Center Co, Limited

Format:

Conference/Event

Author/Creator:

Shibano, Kenji, author.

Conference Name:

International Congress & Exposition (1992-02-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1992

Summary:

Since the intake and exhaust valve timings that provide the best fuel economy, idle stability, or highest power change according to the engine operating zone, a variable valve timing system is very beneficial.Also, roller followers, which reduce mechanical friction loss of a valve train mainly at low engine speed, are commonly used to improve fuel economy in urban driving conditions. This paper presents a newly developed 4-valve variable-valve-timing mechanism with roller followers.Different intake- and exhaust-valve timings and lifts are selected independently, depending upon whether engine speed is low or high.Durability tests of running at maximum engine speed and switching between low- and high-speed cams were conducted and good test results were obtained

Notes:

Vendor supplied data

Publisher Number:

920451

Access Restriction:

Restricted for use by site license