Fig. 46: Hydraulic Pressure Flow Diagram (D Position: Driving In 1st Gear)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
D Position: Shifting between 1st gear and 2nd gear
As the speed of the vehicle reaches the programmed value, the PCM turns shift solenoid valve A ON, and shift
solenoid valve A uncovers the port of shift solenoid valve A pressure (SA) to shift valve A. Shift solenoid
valves B and C remain ON. Shift valve A is moved to the right side to uncover the port of CPC A pressure (4A)
leading to the 2nd clutch. The PCM actuates A/T clutch pressure control solenoid valve A, and A/T clutch
pressure control solenoid valve A pressure (56) is applied to CPC valve A. CPC valve A regulates line pressure
(4), and line pressure (4) becomes CPC A pressure (4A). CPC A pressure (4A) flows to shift valve B via shift
valves C and A, and becomes 2nd clutch pressure (20) at shift valve B. The 2nd clutch is engaged by the CPC
pressure. The 1st clutch is also engaged, but no power is transmitted because of the one-way clutch.
NOTE:
When used, "left" or "right" indicates direction on the hydraulic circuit.
2007 Acura RL
2005-08 TRANSMISSION Automatic Transmission - RL
me
Friday, June 05, 2009 1:18:11 PM
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