F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 61/18 (2006.01) F16H 61/04 (2006.01) F16H 61/70 (2006.01) F16H 63/30 (2006.01) F16H 59/04 (2006.01) F16H 59/08 (2006.01) F16H 59/10 (2006.01) F16H 61/02 (2006.01) F16H 61/16 (2006.01)
Patent
CA 2132561
A control system/method (104) for controlling execution of selected shifts of a mechanical transmission system (10) is provided. The control system includes a central processing unit (106) far receiving input signals indicative of engine or input shaft (11/98) speeds and of output shaft or vehicle speed (VS) speeds and from a driver control console (108) indicative of manual or automatic selection of upshifts or downshifts from a currently engaged gear ratio and processing the same in accordance with predetermined logic rule to issue command output signals to a transmission actuator (112, 70, 96) to implement the selected shifts upon a manually or automatically caused torque break of the transmission and manually or automatically caused substantial synchronization of the transmission thereafter. The predetermined logic rules include a strategy for sensing conditions indicative of a potentially dangerous downhill free-wheeling situation and for immediately causing the forced engagement of a gear ratio (GRFE) determined as a function of vehicle speed regardless of the presence or absence of substantially synchronous conditions.
Borden Ladner Gervais Llp
Corporation Eaton
LandOfFree
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