Pressure Regulation

WARNING: This page is about a different variant/trim than selected.

Manual Valve

Mechanically controlled by the range selector lever, the manual valve is in the Park (P) position and prevents drive\reverse regulator (19) fluid pressure from the clutch regulator valve from entering the drive (18) and reverse (22) fluid circuits.

VFS Line Pressure Control Solenoid C

Feed limit fluid from the feed limit valve is routed to the VFS line pressure control solenoid valve where it passes into the line VFS signal (16) fluid circuit. VFS signal fluid pressure is regulated by the VFS line pressure control solenoid valve duty cycle and helps to regulate line (3) fluid pressure at the pressure regulator valve.

Pressure Regulator Valve

Line VFS signal (16) fluid is routed to the pressure regulator valve and, together with spring force, opposes orificed line feedback (6) fluid pressure to regulate line (3) fluid pressure into the converter feed (17) fluid circuit.

Feed Limit Valve

Auxiliary line\line (5) fluid is routed through orifice #1 to the feed limit valve and into the feed limit (23) fluid circuit. The valve limits feed limit fluid pressure to a maximum pressure. Feed limit (23) fluid is routed to the default override valve, the clutch regulator valve, the TCC regulator valve and all 6 VFS solenoids A thru F.

VFS Binary Solenoid F

Feed limit (23) fluid from the actuator feed limit valve is routed to the VFS binary solenoid F where it passes into the binary VFS signal (24) fluid circuit. Binary VFS signal (24) fluid pressure is regulated by the VFS binary solenoid F duty cycle and is routed to the binary switching valve and the default override valve.

Binary Switching Valve

Binary VFS signal (24) fluid is routed thru orifice # 5 to the binary switching valve and shifts valve against opposing spring force, allowing pressurized secondary line (4) or also line (3) fluid into the primary bypass (2) fluid circuit.

Default Override Valve

Low pressure binary VFS signal (24) fluid is routed thru orifice # 38 to the default override valve and shifts valve against opposing spring force, allowing feed limit (23) fluid to pass into the drive\reverse feed (21) fluid circuit.

VFS Clutch Control Solenoid D

Feed limit (23) fluid from the actuator feed limit valve is routed to the VFS clutch control solenoid D where it passes into the drive\reverse solenoid signal (25) fluid circuit. Drive\reverse solenoid signal (25) fluid pressure is regulated by the VFS clutch control solenoid D duty cycle and is routed to the clutch regulator valve.

Clutch Regulator Valve

Low pressure drive\reverse solenoid signal (25) fluid is routed thru orifice #40 to the clutch regulator valve and opposes valve spring force, allowing drive\reverse feed (21) fluid into the drive\reverse regulator (19) fluid circuit.

VFS Primary Pulley Solenoid B

Feed limit (23) fluid from the actuator feed limit valve is routed to the VFS primary pulley solenoid B where it passes into the primary pulley VFS signal (9) fluid circuit. Primary pulley VFS signal (9) fluid pressure is regulated by the VFS primary pulley solenoid B duty cycle and is routed to the variable drive pulley regulator valve.

Variable Drive Pulley Regulator Valve

Primary pulley VFS signal (9) fluid is routed thru orifice #14 and #15 to the variable drive pulley regulator valve and together with spring force, holds the valve stationary allowing pressurized auxiliary line\line (5) fluid into the primary pulley feed (8) fluid circuit.

Primary Pulley Fluid Pressure Sensor

Auxiliary line\line (5) fluid is routed thru the variable drive pulley regulator valve and into the primary pulley feed (8) fluid circuit then thru orifice # 13 and into the primary pulley (7) fluid circuit then to the primary pulley fluid pressure sensor. The pressure sensor monitors primary pulley (7) fluid pressure. The TCM uses this information to adjust the VFS line pressure control solenoid C duty cycle in order to regulate line (3) fluid pressure.

Variable Drive Pulley Assembly Applied

Primary pulley (7) fluid from the variable drive pulley regulator valve enters the variable drive pulley assembly and acts on the variable drive pulley piston to control the variable drive ratio.

VFS Secondary Pulley Solenoid A

Feed limit (23) fluid from the actuator feed limit valve is routed to the VFS secondary pulley solenoid A where it passes into the secondary pulley VFS signal (12) fluid circuit. Secondary pulley VFS signal (12) fluid pressure is regulated by the VFS secondary pulley solenoid A duty cycle and is routed to the variable driven pulley regulator valve.

Variable Driven Pulley Regulator Valve

Secondary pulley VFS signal (12) fluid is routed thru orifice #19 and #20 to the variable driven pulley regulator valve and together with spring force, holds the valve stationary allowing pressurized auxiliary line\line (5) fluid into the secondary pulley feed (11) fluid circuit.

Secondary Pulley Fluid Pressure Sensor

Auxiliary line\line (5) fluid is routed thru the variable driven pulley regulator valve and into the secondary pulley feed (11) fluid circuit then thru orifice #18 and into the secondary pulley (10) fluid circuit then to the secondary pulley fluid pressure sensor. The pressure sensor monitors secondary pulley (10) fluid pressure. The TCM uses this information to adjust the VFS line pressure control solenoid C duty cycle in order to regulate line (3) fluid pressure.

Variable Driven Pulley Assembly

Secondary pulley (10) fluid from the variable driven pulley regulator valve enters the variable driven pulley assembly in preparation for a shift to drive or reverse.