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The reduction valve reduces the line pressure with which the downstream solenoid valves and pressure control solenoid valve (EDS)are
charged. It is possible to use smaller solenoid valves as a result.
The line pressures comes from the oil pump flow to the eleven spool of the reduction valve and press the fourteen spool of the reduction valve
via the twelve spool. As a result, the eleven spool is blocked. So the line pressure is control to the appropriate level.
Solenoid valve 1, 2
Solenoid 1 control the high or low of the line pres-sure(flow to each clutch valve) by the operation type(ON/OFF),
i.e. solenoid 1 is ON, line pressure will be low(6~8bar), solenoid 1 is OFF, line pressure will be high(16~18bar). Solenoid 2 controls the oil flow
to clutch valve E or lockup clutch valve by the ON/OFF signal. The TCM monitors numerous inputs to determine the appropriate solenoid state
combination and transaxle gear for the vehicle operating conditions.
In Park and Neutral solenoid valve 1 is ON. So line pressure flow to the safety valve and the line pressure control valve via the solenoid valve.
When solenoid 1 is ON, Line pressure is controlled at a Lower level compare with when solenoid 1 is OFF.
Clutch B engaged
In Park and Neutral solenoid valve 1, 2 are ON and EDS4, 6 are ON.
As EDS 6 is ON, the oil which is supplied from the reduction valve flow to the sixty two spool of thesafety valve via the sixty port of the EDS, and
flow clutch valve B, input port holding valve B via the sixty three spool of the safety valve.
The oil that is supplied to input port(64) of the clutch valve presses the valve spool. As a result, line pressure flow 102 port to via 101 port.
In this manner, clutch B is engaged, check ball is block the brake D direction. The oil, which is supplied to 102
port, is connect to 103 port, 104 port(clutch valve spool). Oil pushing the spool above, as a result, clutch B is
released.
Lock up clutch
Solenoid valve 2 is ON, line pressure control valve spool compressed, flow to the 131port via 130 port of the torque converter pressure valve.
As a result, the oil pressure behind the converter lockup clutch piston and in the turbine zone is equal. The direction of flow is through the turbine
shaft and through the space behind the piston, to the turbine chamber. Lubrication, cooling.
The lubricating valve ensures that the converter is supplied with cooling oil first if the pump rate is low. The lubricating pressure valve in addition
guarantees that the necessary amount of cooling and lubricating oil is available via the bypass duct.
The oil which is supplied from torque converter flow to 135 port via 133,134 port, and flow to cooler via lubrication valve
Reverse
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