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1. 发明授权

US6003396A System for controlling downshift points of automatically selectable transmission gears 失效
标题翻译：控制自动选择传动齿轮减速点的系统
公开(公告)号：US6003396A
公开(公告)日：1999-12-21
申请号：US63474
申请日：1998-04-20
申请人： Steven M. Bellinger , David J. Munt , Stephen L. Cooper , Daniel W. Bache
发明人： Steven M. Bellinger , David J. Munt , Stephen L. Cooper , Daniel W. Bache
IPC分类号： F16H59/24 , F16H59/36 , F16H59/48 , F16H61/02 , F16H59/30
CPC分类号： F16H61/0213 , B60W2510/0604 , B60W2510/0638 , B60W2510/0652 , B60W2520/105 , F16H59/24 , F16H59/36 , F16H59/48 , Y10T477/692 , Y10T74/19251 , Y10T74/1926
摘要： A system for controlling automatic transmission downshift points includes a control computer for electronically controlling an internal combustion engine and a transmission having at least one automatically selectable gear. The control computer is responsive to at least a throttle signal, provided by either a manually actuatable accelerator pedal or a cruise control system, to compute an engine load value, and is further responsive to either an engine speed signal or a vehicle speed signal to compute a deceleration value. The control computer is operable to compute a downshift engine RPM value based on the deceleration value and either the throttle signal or the engine load value, wherein the downshift engine RPM value is lower than a default downshift engine RPM if the deceleration value indicates a relatively slow deceleration rate and the throttle signal or the engine load value indicates high throttle or engine load. Conversely, the downshift engine RPM value is higher than the default downshift engine RPM value if the deceleration value indicates a relatively high deceleration rate and the throttle signal or the engine load indicates high throttle or engine load.
摘要翻译：用于控制自动变速器降档点的系统包括用于电子控制内燃机的控制计算机和具有至少一个可自动选择的齿轮的变速器。控制计算机响应至少一个由手动可启动的加速器踏板或巡航控制系统提供的油门信号来计算发动机负载值，并且还响应于发动机转速信号或车速信号来计算减速度值。控制计算机可操作以基于减速值和油门信号或发动机负载值来计算降档发动机RPM值，其中如果减速度值指示相对较慢，则降档发动机RPM值低于默认降档发动机RPM 减速率和油门信号或发动机负载值表示高油门或发动机负荷。相反，如果减速度值指示相对较高的减速率，并且油门信号或发动机负载指示高油门或发动机负载，则降档发动机RPM值将高于默认的降档发动机RPM值。

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