摘要:
A method and system for controlling downshifting of an automated mechanical transmission system which senses unsuccessful attempts to engage a predetermined downshift target gear ratio (GR.sub.T) due to engine speed remaining less than the synchronous engine speed (ES=OS*GR.sub.T) for engaging said target gear ratio and, in response to sensing such conditions, automatically initiates a degraded mode of operation wherein an achievable degraded mode target gear ratio (GR.sub.DMT
摘要翻译:一种用于控制自动机械传动系统的降档的方法和系统,其感测由于发动机转速保持小于用于接合所述目标的同步发动机转速(ES = OS * GRT)而使预定降档目标变速比(GRT)不成功的尝试 并且响应于感测这样的条件,自动地启动降级的操作模式,其中识别出实现的达到的最大发动机转速(ESMAX)可同步的可实现的降级模式目标齿轮比(GRDMT
摘要:
A control method/system for controlling engagement of reverse ratios in automated vehicular transmission systems (10) having a controller (38) issuing command output signals to non-manually controlled actuators (30, 34) is provided. The controller includes logic rules for (i) sensing predetermined reverse ratio enabling conditions, including remaining in neutral for at least a predetermined period of time (N.sub.T >REF.sub.2) prior to selecting reverse, and (ii) issuing commands to cause a reverse ratio to be engaged only upon sensing such conditions, to minimize accidental engagement of reverse ratios without requiring mechanical interlocks.