Design and Development of a Mechanical Variable Valve Actuation System Delphi Automotive Systems

Format:

Book

Conference/Event

Author/Creator:

Pierik, Ronald J., author.

Conference Name:

SAE 2000 World Congress (2000-03-06 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

Compromises inherent with fixed valve lift and event timing have prompted engine designers to consider Variable Valve Actuation (VVA) systems for many decades. In recent years, some relatively basic forms of VVA have been introduced into production engines. Greater performance and driveability expectations of customers, more stringent emission regulations set by government legislators, and the mutual desire for higher fuel economy are increasingly at odds. As a solution, many OEM companies are seriously considering large-scale application of higher function VVA mechanisms in their next generation vehicles.This paper describes the continuing development progress of a mechanical VVA system. Design features and operation of the mechanism are explained. Test results are presented in two sections: motored cylinder head test data focuses on VVA system friction, control system performance, valve lift and component stress. Dynamometer results from a four-cylinder test engine focus on fuel consumption, emissions, torque and combustion stability characteristics. The paper finishes with a description of proposed future activities

Notes:

Vendor supplied data

Publisher Number:

2000-01-1221

Access Restriction:

Restricted for use by site license