Dynamic characteristics of vehicle powertrain system and modeling method of manual transmission gear rattle are studied on idle condition, which is then validated by vehicle experiment. Firstly, for an inline four-cylinder and four-stroke engine, a quasi-transient engine model considering dynamic friction property is modelled. Secondly, by the lumped mass modeling method, dynamic model of vehicle powertrain system on idle condition is established, taking into account loose gear drag torque. The model represents dynamic characteristics of powertrain system and gear rattle phenomenon of manual transmission. Finally, effectiveness of quasi-transient engine model and vehicle powertrain system model is validated by vehicle experiment results on idle condition. The research achievements will contribute to vehicle powertrain system design and mechanism analysis of manual transmission gear rattle phenomenon.
Key words
gear rattle /
quasi-transient engine model /
drag torque model /
vehicle experiment
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References
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