초록 ▼

The present invention provides an improved throttle valve regulating system for automatic transmissions for motor vehicles. In such automatic transmissions, the throttle valve reciprocates in a bore as a result of the action of a plunger and a throttle valve spring to control the flow and pressure o

The present invention provides an improved throttle valve regulating system for automatic transmissions for motor vehicles. In such automatic transmissions, the throttle valve reciprocates in a bore as a result of the action of a plunger and a throttle valve spring to control the flow and pressure of transmission fluid or oil to effect gear shifting. The present improvement provides a rigid spacing element of predetermined length received within the throttle valve spring for urging the valve towards a full throttle position in the event that the valve sticks in the bore in a lower throttle position. The system further includes a high rate spring located in the full throttle position in the bore to prevent sticking of the valve in that position, and a low rate spring similarly positioned in the bore to counteract the force of the throttle valve spring for returning the throttle valve to a low throttle or zero position. The reciprocating throttle valve includes at least one land or circumferential flange having sharpened edges for shearing large particles or other impurities introduced into the bore with the transmission fluid which might otherwise become wedged between the valve and the bore and cause sticking of the valve in a fixed position in the bore.

대표청구항 ▼

A throttle valve system for automatic transmissions including a throttle valve member movable within a bore between two predetermined positions, a plunger for driving the throttle valve member in said bore, a throttle valve spring disposed between the plunger and the valve member for transmitting th

A throttle valve system for automatic transmissions including a throttle valve member movable within a bore between two predetermined positions, a plunger for driving the throttle valve member in said bore, a throttle valve spring disposed between the plunger and the valve member for transmitting the force exerted by the plunger to the throttle valve member, and a rigid spacer element freely mounted within the throttle valve spring, said spacer element being of a length less than the length of said throttle valve spring when said spring is in its normal operative position, said spacer element adapted to exert a force directly on said throttle valve member if said valve member sticks in said bore and is no longer movable with said throttle valve spring, said spacer element directly abutting against said valve member and applying a force thereagainst, under the urging of said plunger, only if said valve member is stuck in said bore and said throttle valve spring is compressed to a length substantially equal to the length of said spacer element, said spacer element not directly abutting against said valve member during normal operation of said throttle valve system.