초록 ▼

A control valve assembly (94) is provided for allowing manual and automatic splitter shifting in a compound splitter-type vehicular transmission system (92). The control valve assembly is interposed in series between a selectively pressurized and exhausted conduit (108) controlled by a manual select

A control valve assembly (94) is provided for allowing manual and automatic splitter shifting in a compound splitter-type vehicular transmission system (92). The control valve assembly is interposed in series between a selectively pressurized and exhausted conduit (108) controlled by a manual selector valve (104) and a pilot conduit (110) controlling the operation of a splitter shift actuator (86). The control valve assembly is designed to fail in a position allowing fluid communication between the selectively pressurized and exhausted conduit and the pilot conduit.

대표청구항 ▼

[ We claim:] [1.] A control valve assembly (94) for controlling shifting in a vehicular change-gear transmission system (92) comprising a mechanical change-gear transmission (10), a first selectively pressurized and exhausted conduit (108), a manually controlled selector valve (104) for selectively

[ We claim:] [1.] A control valve assembly (94) for controlling shifting in a vehicular change-gear transmission system (92) comprising a mechanical change-gear transmission (10), a first selectively pressurized and exhausted conduit (108), a manually controlled selector valve (104) for selectively pressurizing and exhausting said first conduit, a second selectively pressurized and exhausted conduit (110), a shift actuator (86) responsive to pressurization in said second conduit to move to a first position and responsive to exhaust of said second conduit to move to a second position, said control valve assembly (94) interposed in series between said first and second conduits and having a first condition (S#1=off; S#2=off) for fluidly communicating said first and second conduits and a second condition (S#1=on) for blocking fluid communication between said first and second conduits and selectively pressurizing (S#2=on) and exhausting (S#2=off) said second conduit independent of said manual selection valve.