MPV ES V6-2.5L DOHC (2001)
Operation
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Normally, line pressure (12) is retained because the 3-2 timing solenoid valve is turned OFF.
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The line pressure overcomes spring force to push the valve to the left side.
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When shifting from 1GR to 2GR, 2-4 brake application pressure (9) passes through the 3-2 timing valve to engage the 2-4 brake band with the
solenoid valve ON. Brake band application pressure (9) from the other circuit also engages the 2-4 brake band.
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When shifting from 3GR to 2GR, the 3-2 timing valve drains 2-4 brake release pressure (15) to achieve shifting timing. When 2-4 brake band
application side pressure reaches the specified pressure, the 3-2 timing solenoid valve goes OFF, and the 3-2 timing valve moves to the left to
close outlet port (9).
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As a result, the 2 - brake application side pressure increases gradually, improving 1 GR to 2GR upshift response and reducing shift shock.
Pressure Modifier Accumulator
PRESSURE MODIFIER ACCUMULATOR
Outline
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This valve stabilizes the modifier pressure adjusted by the pressure modifier valve to prevent modifier pressure pulsation.
Operation
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The valve is pushed to the left by modifier pressure (21) and to the right by spring force. When modifier pressure (21) pulsates at high pressure,
the valve moves to the left. When it pulsates at low pressure, the valve moves to the right. This operation stabilizes modifier pressure.
3-4 Shift Valve
3-4 SHIFT VALVE
Outline
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The 3-4 shift valve automatically shifts between 3GR and 4GR.
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The 3-4 shift valve switches paths for line pressure applied to the 3-4 shift valve. The shift solenoid C ON-OFF signal is controlled by the PCM.
