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Engine-CVT consolidated control using LQI control theory

โœ Scribed by Takeshi Takiyama; Shigeyuki Morita

Book ID
104342628
Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
574 KB
Volume
20
Category
Article
ISSN
0389-4304

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โœฆ Synopsis

For the drivetrain control, it has become important for fuel economy or AHS to control the throttle valve of the engine and the gear ratio of CVT simultaneously by DBW when the automobile is equipped with CVT. In this paper, LQI control theory was applied to control the drivertrain as a 2-I/O system to satisfy the demanded speed and better fuel economy. Moreover, modi"cation of the weight parameter of LQI was investigated to obtain the desired performance for fuel economy or vehicle acceleration. Relatively good results were obtained.

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If an engine with an electric throttle valve control and CVT is "tted to the powertrain, fuel consumption becomes economical while the throttle valve angle and the gear ratio of CVT are controlled simultaneously. If the engine is operated with a lean air-fuel ratio (A/F), it is also e!ective for fue