汽车技术
汽車技術
기차기술
AUTOMABILE TECHNOLOGY
2014年
5期
30-34,61
,共6页
自动变速器%换挡策略%城市工况%燃油消耗率
自動變速器%換擋策略%城市工況%燃油消耗率
자동변속기%환당책략%성시공황%연유소모솔
Automatic transmission%Gearshift strategy%City cycle%Fuel consumption
介绍了整车纵向动力学的建模方法和换挡策略计算方法。通过仿真分析城市工况下各挡位的燃油消耗率，并从整车经济性角度对换挡曲线进行优化。针对城市工况下油门开度反复变化导致的频繁换挡现象，采用基于人工经验的模糊修正方法，根据油门开度变化率对换挡曲线进行修正。测试结果表明，该方法能够有效降低频繁换挡次数，提高整车在城市工况下的驾驶性。
介紹瞭整車縱嚮動力學的建模方法和換擋策略計算方法。通過倣真分析城市工況下各擋位的燃油消耗率，併從整車經濟性角度對換擋麯線進行優化。針對城市工況下油門開度反複變化導緻的頻繁換擋現象，採用基于人工經驗的模糊脩正方法，根據油門開度變化率對換擋麯線進行脩正。測試結果錶明，該方法能夠有效降低頻繁換擋次數，提高整車在城市工況下的駕駛性。
개소료정차종향동역학적건모방법화환당책략계산방법。통과방진분석성시공황하각당위적연유소모솔，병종정차경제성각도대환당곡선진행우화。침대성시공황하유문개도반복변화도치적빈번환당현상，채용기우인공경험적모호수정방법，근거유문개도변화솔대환당곡선진행수정。측시결과표명，해방법능구유효강저빈번환당차수，제고정차재성시공황하적가사성。
Modeling method of vehicle longitudinal dynamics and calculation method of gearshift strategy are introduced in this paper. The fuel consumption for each gear in city driving cycle is analyzed with simulation, and the gearshift curve is optimized from the perspective of vehicle economy. According to the frequent shifting during the city cycle with the throttle pedal changed repeatedly, fuzzy correction method based on human experience is adopted, and the shifting curve is corrected according to the change rate of throttle pedal. The test results show that this method can reduce the frequency of gearshift effectively and improve the vehicle driveability in city cycle.
