Reverse Inhibit Valve

Reverse Inhibit Valve

Outline
^ The reverse inhibit valve switches the line pressure oil passage that is applied to the low and reverse brakes while in reverse.

Operation
^ Spring force is applied to the right side of the valve and pushes it to the left. While in reverse, the neutral shift solenoid valve does not operate so the valve is positioned on the left by spring force. In this condition, oil passages (4) and (20) are connected and line pressure (4) from the manual valves is applied to the low and reverse brake via oil passage (20). When driving forward with speed of 30 km/h (19 mph) or more and the R position is selected, the neutral shift solenoid is ON to prevent shock or engine stoppage, and pilot pressure (17) generates. By this pressure, the reverse inhibit valve is pushed to the right and line pressure passage to the low and reverse brake is blocked. Since the low and reverse brake are drained, the drive force is not transferred the transmission is put in are neutral.