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Development of Automatic Control System and Diagnostic System for a Mini-Tunnel
Technical Paper
908225
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
A report on the mini-tunnel of twin-orifice type has already
been presented at the JSAE for 1990. This paper describes the
development some new devices to enable using the mini-tunnel in
engine development. These devices include an automatic exchange
orifice able to be set in a short time regardless of engine
capacity, and an open to atmospheric pressure device which
maintains the split ratio constant.
In particular, to maintain the measuring accuracy of particulate
emission, a pre-alarm diagnostic system is used with which the
signals from many kinds of sensors installed in the mini-tunnel
system are calculated with a computer.