Development of New Concept Control System for Valve Timing Control UNISIA JECS Corporation

Format:

Book

Conference/Event

Author/Creator:

Hosoya, Hajime, 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:

We have applied a nonlinear control system to a hydraulicallyoperated continuous valve timing control (CVTC) now in the mainstream of variable valve actuation systems. The system applied this time is a sliding mode control (SMC), which is found of late in a number of applications. Hydraulic pressure serving as the driving source of the CVTC and the mechanism of the CVTC have nonlinear characteristics. We have investigated certain problems which occur, influenced by this nonlinearity, when using a PID controller for CVTC control. Typical issues include a large program memory size because of the large number of control parameters, a resultant considerable number of manhours required for adaptation, and the low compatibility of response performance both for large step operations and for small step operations. Furthermore, high machining accuracy is required for the mechanical components. When an SMC is used, however, these problems can be solved because of the strong robust functions of the variablestructure SMC. We can build up a system which is robust in structure, which scarcely requires adaptation for actual engine systems, and which is excellent for installation on the engine control module (ECM)

Notes:

Vendor supplied data

Publisher Number:

2000-01-1226

Access Restriction:

Restricted for use by site license