Honda Odyssey 2004. Manual — part 224
*04
45
Hydraulic Controls (cont’d)
Regulator Valve
14-290
Automatic Transmission
System Description (cont’d)
VALVE
ORIFICE
REGULATOR VALVE
A
B’
B
From ATF PUMP
To TORQUE CONVERTER
To LUBRICATION
TORQUE CONVERTER
STATOR
REGULATOR VALVE BODY
REGULATOR VALVE
STATOR SHAFT ARM
REGULATOR SPRING CAP
STATOR SHAFT
The regulator valve maintains constant hydraulic pressure from the ATF pump to the hydraulic control system, while
also furnishing fluid to the lubricating system and torque converter. Fluid from the ATF pump flows through B and B’.
Fluid entering from B flows through the valve orifice to the A cavity. This pressure of the A cavity pushes the regulator
valve to the right side, and this movement of the regulator valve uncovers the fluid port to the torque converter and
the relief valve. The fluid flows out to the torque converter and the relief valve, and the regulator valve moves to the
left side. According to the level of the hydraulic pressure through B, the position of the regulator valve changes, and
the amount of fluid from B’ through torque converter changes. This operation is continued, maintaining the line
pressure.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the illustration.
Increases in hydraulic pressure according to torque are performed by the regulator valve using stator torque reaction.
The stator shaft is splined to the stator in the torque converter, and its arm end contacts the regulator spring cap.
When the vehicle is accelerating or climbing (torque converter range), stator torque reaction acts on the stator shaft,
and the stator arm pushes the regulator spring cap in the direction of the arrow in proportion to the reaction. The
stator reaction spring compresses, and the regulator valve moves to increase the line pressure which is regulated by
the regulator valve. The line pressure reaches its maximum when the stator torque reaction reaches its maximum.
03/07/29 09:37:20 61S0X050_140_0293
*05
46
*07
Servo Body
Top Accumulator Body
Accumulator Body
3rd Accumulator
14-291
CPC VALVE A
CPC VALVE B
SERVO VALVE
SHIFT VALVE A
SHIFT VALVE B
SERVO BODY
SHIFT VALVE E
CPC VALVE C
1ST-HOLD
ACCUMULATOR
TOP ACCUMULATOR BODY
5TH ACCUMULATOR
4TH ACCUMULATOR
LUBRICATION CHECK VALVE
ACCUMULATOR BODY
1ST ACCUMULATOR
2ND ACCUMULATOR
END COVER
3RD ACCUMULATOR
The servo body is on the main valve body. It contains the servo valve, the shift valve A, the shift valve B, CPC valves A
and B.
The top accumulator body contains shift valve E, CPC valve C, 4th/1st-hold accumulator, and 5th accumulator.
The accumulator body is on the torque converter housing, next to the main valve body. It contains the 1st and the 2nd
accumulators and the lubrication check valve.
The 3rd accumulator is in the end cover.
03/07/29 09:37:21 61S0X050_140_0294
S0X4AA1E10410800000CAAT05
Hydraulic Flow
Distribution of Hydraulic Pressure
14-292
Automatic Transmission
System Description (cont’d)
As the engine turns, the ATF pump starts to operate. Automatic transmission fluid (ATF) is drawn through the ATF
strainer (filter) and discharged into the hydraulic circuit. Then, ATF flowing from the ATF pump becomes line pressure
that’s regulated by the regulator valve. Torque converter pressure from the regulator valve enters the torque converter
through the lock-up shift valve and it is discharged from the torque converter. The torque converter check valve
prevents torque converter pressure from rising.
The PCM turns the shift solenoid valves ON and OFF, and the shift solenoid valves control shift solenoid pressure to
the shift valves. Applying shift solenoid pressure to the shift valves moves the position of the shift valve, and switches
the port of hydraulic pressure. The PCM also controls A/T clutch pressure control solenoid valves A and B. The A/T
clutch pressure control solenoid valves regulate the A/T clutch pressure control solenoid pressure and apply the A/T
clutch pressure control solenoid pressure to CPC valves A and B.
When shifting gears, the clutch is engaged by pressure from the CPC pressure mode. The PCM controls one of the
shift solenoid valves to move the position of the shift valve. This movement switches the port of the CPC and line
pressure. Line pressure is then applied to the clutch, and the CPC pressure is intercepted. Engaging the clutch with line
pressure happens after CPC pressure mode has completed.
Hydraulic pressure at the ports is as follows:
PORT
NO.
DESCRIPTION OF
PRESSURE
PORT
NO.
DESCRIPTION OF
PRESSURE
PORT
NO.
DESCRIPTION OF
PRESSURE
1
LINE
5N
CPC A or LINE
56
LS A
2
LINE
5D
CPC B or LINE
57
LS B
3
LINE
5G
CPC B or LINE
58
LS C
3’
LINE
5K
CPC B or LINE
90
TORQUE CONVERTER
3’’
LINE
6
MODULATE
90’
TORQUE CONVERTER
4
LINE
SA
SH A
91
TORQUE CONVERTER
4’
LINE
SB
SH B
91’
TORQUE CONVERTER
4’’
LINE
SC
SH C
92
TORQUE CONVERTER
4A
CPC A
LA
LC A
93
ATF COOLER
4B
CPC B
9
LINE
94
TORQUE CONVERTER
4C
CPC C
10
1ST CLUTCH
95
LUBRICATION
5B
CPC A
15
1ST-HOLD CLUTCH
95’
LUBRICATION
5C
CPC B
20
2ND CLUTCH
96
TORQUE CONVERTER
5H
CPC B
25
LINE
99
SUCTION
5J
CPC B
30
3RD CLUTCH
X
DRAIN
5A
CPC A or LINE
40
4TH CLUTCH
HX
HIGH POSITION DRAIN
5E
CPC A or LINE
50
5TH CLUTCH
AX
AIR DRAIN
5F
CPC A or LINE
51
5TH CLUTCH
5M
CPC A or LINE
55
CPC C or LINE
NOTE:
• CPC: Clutch Pressure Control pressure
• SH: Shift Solenoid pressure
• LS A: A/T Clutch Pressure Control Solenoid A pressure
• LS B: A/T Clutch Pressure Control Solenoid B pressure
• LS C: A/T Clutch Pressure Control Solenoid C pressure
• LC: Torque Converter Clutch Solenoid pressure
03/07/29 09:37:22 61S0X050_140_0295
*08
N Position
14-293
TORQUE
CONVERTER
CLUTCH
SOLENOID
VALVE
94
90
91
TORQUE
CONVERTER
6
LA
LOCK-UP
TIMING VALVE
90 91
X X
90’ 91’
58
91’
91
96 92
93
95
X
6
90’
96
58 96
X90
X
92
LOCK-UP
CONTROL
VALVE
95
2
X
X
95
RELIEF VALVE
90
93
93’
X
TORQUE
CONVERTER
CHECK VALVE
COOLER CHECK
VALVE
ATF FILTER
99
1
92 1
REGULATOR VALVE
95
95’
X
LUBRICATION
CHECK VALVE
ATF PUMP
REVERSE
CPC
VALVE
SERVO VALVE
10
3
3’’
3’
X
SERVO
CONTROL
VALVE
3’
4’
4’’
X
3
9
4 X
4’’
4’
10
1
6
MODULATOR VALVE
3’’
MANUAL VALVE
4
2
51
50
1
3
3’’
57
5
56
58
SB
X
6
X
X
56
4
4
X
4B
57
6
4
4 H1X
4
5B H2X
5C
4B
SC
KICK-DOWN VALVE
H9X
KICK-DOWN
SHORT VALVE
4A
30
4C
X
55
4
SA
X5B 5A 5B 51
5H
5H
9
5F
5M
5D
SB
5J 4A 25
5TH
ACCUMULATOR
5TH CLUTCH
4TH CLUTCH
3RD
ACCUMULATOR
3RD CLUTCH
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE
SWITCH
2ND ACCUMULATOR
1ST/1ST-HOLD CLUTCH
1ST ACCUMULATOR
1ST-HOLD/4TH
ACCUMULATOR
40
15
4C
10
15 10 20 2ND
CLUTCH
30
30
40 50
55
50
ON
OFF
OFF
X
X
4TH CLUTCH
TRANSMISSION FLUID
PRESSURE
SWITCH
LA 94
LOCK-UP
SHIFT
VALVE
95
25
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE A
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE C
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE B
SHIFT SOLENOID
VALVE B
SHIFT SOLENOID
VALVE C
SHIFT SOLENOID
VALVE A
6
6
CPC VALVE A
CPC VALVE B
5D 4A
SHIFT VALVE C
SHIFT VALVE E
4C
1
CPC
VALVE C
H3X
SA
5J
5G
50X
5E
5F
SHIFT VALVE B
15
SHIFT
VALVE D
40
H4X
93
MAINSHAFT
COUNTERSHAFT
SECONDARY
SHAFT
4A AX
5A
5E
20
AX
57 SC
H10X
SHIFT
VALVE A
H5X
X 58
H6X
5M X
HX
AX
HX HX
AX
HX
HX AX
HX
HX AX
SC
5A
10
5N
SBX9
5K
58
5D 5G
5H 5C 5K
30
The PCM controls the shift solenoid valves. The conditions of the shift solenoid valve and positions of the shift valve
are as follows:
• The shift solenoid valve A is turned OFF, and the shift valve A moves to the left side.
• The shift solenoid valve B is turned ON, and the shift valve B stays on the right side.
• The shift solenoid valve C is turned OFF, and the shift valve C stays on the left side.
Line pressure (1) passes through the manual valve and becomes line pressure (25). Line pressure (25) stops at shift
valve D. Line pressure (1) also flows to the modulator valve and becomes modulator pressure (6). Modulator pressure
(6) flows to the shift solenoid valves and the A/T clutch pressure control solenoid valves. Under this condition,
hydraulic pressure is not applied to the clutches.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
(cont’d)
03/07/29 09:37:24 61S0X050_140_0296
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