Transmission pressure retaining valve

TRANSMISSION PRESSURE RETAINING VALVE

If the wheels lock under braking then the Pitot pressure cannot be generated and the transmission control valve moves to the left. The oil drains out and the pulley ratio changes.

To resolve this problem, the pressure retaining valve stabilises the pulley ratio before and after releasing the brake to avoid the jerk caused by a ratio change. The pressure retaining valve impedes oil discharge, and hence maintains constant oil pressure at the primary pulley.

ECVT REDUCTION GEAR SYSTEM AND COOLING SYSTEM

The reduction gear system has two stages: primary reduction and secondary reduction. Both stages use helical gear pairs.

The differential is identical to that of a manual transmission.

1. Secondary pulley
2. Idler pinion (drop gear)
3. Primary reduction
4. Secondary reduction

The cooling system consists of a separate oil cooler, rigid pipes and flexible tubes. The lubricating oil recirculates in the cooling circuit and passes through the cooler.