Overlap Regulating Valve, Function Mercedes-Benz E-class W211/S211

Overlap Regulating Valve, Function

Operation

During the shift phase the pressure in the disengaging shift actuator is controlled depending on the engine load (modulating pressure (p-Mod)) and the pressure in the engaging shift actuator. The regulated pressure is inversely proportional to the transfer capacity of the activating shift actuator (regulated overlap).

Scheme 137

Scheme 138

1. Torque Converter Lockup Clutch Regulating Valve, Location In the valve housing of the shift plate.
2. Torque Converter Lockup Clutch Regulating Valve, Task Hydraulic control of the torque converter lockup clutch and distribution of the lubricating oil.
3. Torque Converter Lockup Clutch Regulating Valve, Function See «TORQUE CONVERTER LOCKUP CLUTCH REGULATING VALVE, FUNCTION»(ref-172274-S12333164332005030200000) .

Scheme 139

Operation

The converter lockup clutch regulating valve (27) regulates the working pressure in the converter lockup clutch (p-KUB) depending on the control pressure in converter lockup clutch (p-S/KUB).

Depending on the working pressure in the converter lockup clutch (p-KUB) the converter lockup clutch (KUB) is

1. Engaged
2. Disengaged
3. N Slip Mode

In the lower position of the converter lockup clutch regulating valve (27) lubricating oil (p-Sm) flows through the torque converter and oil cooler (65) into the transmission (converter lockup clutch depressurized). In its regulating position (slipping, torque converter lockup clutch pressurized), a reduced volume of lubricating oil (p-Sm) flows through the annular passage (27a) bypassing the torque converter and passing direct through the oil cooler (65) into the transmission. The other part of he lubricating oil (p-Sm) is led via the restrictor (a) into the torque converter for cooling the converter lockup clutch (KUB).

Scheme 140

1. R/P Lock, Location The R/P lock is integrated in the electronic selector lever module control unit (N15/5).
2. R/P Lock, Task Depending on the prerequisite, the R/P-lockout prevents a shift out of selector lever position "P" or a changeover to selector lever position "R" from "N".
3. R/P Lock, Design The R/P lock consists of: Locking Lever (69) R/P Locking Solenoid (89) Rocker (100) Leaf Spring Of Rocker (101) Rocker Arm (102) Leaf Spring Of Rocker Arm (103)
4. R/P Lock, Function See «R/P LOCK, FUNCTION»(ref-172274-S31871982182005030200000) .

Scheme 141

P Lock, Function

The selector lever position "P" is locked when the R/P-locking magnet (89) is not actuated by the electronic selector lever module control unit (N15/5). The prerequisites for this are as follows

1. No voltage supply to the electronic selector lever module control unit (N15/5).
2. Brake pedal not depressed.

Under these conditions the rocker (100) is held in front of the locking lever (69) by the spring force of the leaf spring of the rocker (101). It is not possible to shift the selector lever (80) out of selector position "P".

When the ignition is switched on and the brake pedal is depressed, the R/P locking solenoid is actuated. The rocker arm (102) presses on the rocker (100) and the selector lever (80) cam be moved away from position "P".

R/P Lock, Function

Above a speed of approximately 8 km/h the R/P locking solenoid (89) is actuated by the electronic selector lever module control unit (N15/5). the rocker arm (102) presses on the rocker (100), which is turned to the locking position.

The lock lever (69) rests against the rocker (100) and the selector lever (80) cannot be shifted to position "R".

Scheme 142

1. Holding Pressure Shift Valve, Location Each shift group is assigned a holding pressure shift valve (28a, 28b, 28c). The holding pressure shift valves 1-2/4-5 (28a) and 2-3 (28b) are installed in the valve housing (2b), the 3-4 holding pressure shift valve (28c) is installed in the valve housing of the shift plate (2a).
2. Holding Pressure Shift Valve, Task Allocates the working pressure to one actuator of a shift group.
3. Holding Pressure Shift Valve, Function See «HOLDING PRESSURE SHIFT VALVE, FUNCTION»(ref-172274-S04773016232005030200000) .

Scheme 143

Operation

The holding pressure shift valve (28) is engaged by pressure in the shift elements acting on the front face and spring. It assigns the working pressure (p-A) to the shift element with the higher pressure (taking into account the spring force and the effective area).

The other element of the shift group is then unpressurized. The valve switches over only during the shift phase and only at a certain pressure ratio between the overlap pressure (p-U) and the shift pressure (p-S).

Scheme 144

1. Shift Pressure Shift Valve, Location Each shift group possesses one shift pressure shift valve. The 1-2/4-5 shift pressure shift valves (29a) and 2-3 shift pressure shift valve (29b) are installed in the valve housing of the shift plate (2b), the 3-4 shift pressure shift valve (29c) is installed in the valve housing of the shift plate (2a).
2. Shift Pressure Shift Valve, Task To assign shift pressure to the engaging shift actuator and to assign the overlap pressure, controlled by the overlap regulating valve, to the disengaging shift actuator.
3. Shift Pressure Shift Valve, Function See «SHIFT PRESSURE SHIFT VALVE, FUNCTION»(ref-172274-S01252119602005030200000) .

Scheme 145

Operation

When the multiple-disc brake (B) is engaged, the working pressure (p-A) is applied to the end face of the shift valve (29) via the command valve (31). Its shift condition is retained in the shift phase, while the shift element pressure acting on the end face and which is variable during the shift phase is replaced by a corresponding, constant pressure.

When the multiple-disc clutch (K) is engaged (K) the end face of the shift pressure shift valve (29) is depressurized during the stationary and shift phases, here the shift condition is also retained during the shift phase.

Scheme 146

1. Float, Location In the electrical control unit (Y316).
2. Float, Function See «FLOAT, FUNCTION»(ref-172274-S31914204732005030200000) .

Scheme 147

Function

With low oil levels, the lubrication oil which flows constantly out of the gearset, flows back to the oil gallery (A) through the opening (46). If the oil level rises, the oil presses the float (45) against the housing.

The float (45) therefore separate the oil gallery (A) from the gearset chamber (B). The lubricating oil which continues to flow out of the gearsets is thrown against the housing wall, incorporated by the rotating parts and flows back into the oil gallery (A) through the upper opening (arrow).

Scheme 148

1. ETC Control Unit, Location See «ETC Control Unit, Location»(ref-172274-S01351880612005030200000) .
2. ETC Control Unit, Task See «ETC CONTROL UNIT, TASK (EXCEPT CODE (428A) STEERING WHEEL SWITCH BUTTONS)»(ref-172274-S09051895492005030200000) or «ETC CONTROL UNIT, TASK (WITH CODE (428A) STEERING WHEEL SWITCH BUTTONS)»(ref-172274-S28154141972005030200000) .

Scheme 149

Location

The ETC control unit (N15/3) is installed under the tread plate in the front passenger footwell.

Scheme 150

The ETC control unit (N15/3) measures the current operating state of the vehicle and controls all shifting operations taking the ease of shifting and driving situation into consideration.

It receives input signals as operating data from

1. Starter Lockout Contact (Y3/6S1)
2. Transmission Oil Temperature Sensor (Y3/6B1
3. RPM Sensor 2 (Y3/6N2)
4. RPM Sensor 3 (Y3/6n3)

In addition there is a connection to the following via the Controller Area Network bus Class C (engine compartment) (CAN-C)

1. Instrument Cluster (A1)
2. ME-SFI Control Unit (N3/10) or CDI Control Unit (N3/9)
3. Electronic Selector Lever Module Control Unit (N15/5)
4. ESP & BAS Control Unit (N47-5)
5. EIS [EZS] Control Unit (N73)

The ETC [EGS] control unit takes over the actuation of the solenoid valves for modulating and shift pressure and for shifting gears (N15/3).

The necessary pressure in relation to the torque to be transmitted, is computed from all the input signals.

The following information from other systems is processed in so doing.

Motor Electronics Control Unit (N3/10) Or CDI Control Unit (N3/9)

1. Request: Starting Off In 1st Gear
2. Request: Active Downshift
3. Request: Status Of Torque Converter Lockup Clutch
4. Limp-Home Mode
5. Cruise Control Operation
6. Engine Speed Limiter Active
7. Engine Status
8. Engine Oil Status
9. Specified Torque
10. Starter Running
11. Idle Speed
12. Shift Curve Offset
13. Pedal Value
14. Inertia Fuel Shutoff
15. Targeted Gear
16. Kickdown (As Of 7/1/02)

Electronic Ignition Switch Control Unit (N73)

1. Circuit 50 Engine Start Switch (Circuit 50)

N15/5 Electronic Selector Lever Control Unit

1. Selector Lever Position
2. Switch Position Of Transmission Mode Switch (S16/5)
3. Locking Solenoid Energized

ESP & BAS Control Unit (N47-5)

1. Request: Shift Into "N" (Neutral)
2. Request: Targeted Gear
3. Request: Active Downshift
4. Wheel Speeds, Direction
5. Braking Torque
6. Lateral Acceleration
7. Shift Curve Offset
8. Cruise Control OFF
9. Parking Brake Operated
10. ESP Indicator Lamp
11. ESP Brake Intervention Active
12. System Status

The following information is output to other systems.

Instrument cluster (A1)

1. Transmission mode selection at transmission mode switch (S16/5).
2. Selector Lever Position
3. Transmission Variant

ESP and BAS control unit (N47-5)

1. Transmission Variant
2. Actual gear engaged/target gear.

Electronic ignition switch control unit (N73)

1. Selector Lever Position

Motor electronics control unit (N3/10) or CDI control unit (N3/9)

1. Request: Engine Torque
2. Drive Torque Control
3. Limp-home
4. Engine Emergency Stop
5. Transmission Variant
6. Actual gear engaged/target gear.
7. Transmission mode selection at transmission mode switch (S16/5).
8. Torque converter lockup clutch status.
9. Selector Lever Position

Scheme 151

The ETC control unit (N15/3) measures the current operating state of the vehicle and controls all shifting operations taking the ease of shifting and driving situation into consideration.

It receives input signals as operating data from the

1. Starter Lockout Contact (Y3/6S1)
2. Transmission Oil Temperature Sensor (Y3/6B1)
3. RPM Sensor 2 (Y3/6N2)
4. RPM Sensor 3 (Y3/6N3)

In addition there is a connection to the following via the Controller Area Network bus Class C (engine compartment) (CAN-C)

1. Instrument Cluster (A1)
2. ME-SFI Control Unit (N3/10) or CDI Control Unit (N3/9)
3. Electronic Selector Lever Module Control Unit (N15/5)
4. ESP and BAS Control Unit (N47-5)
5. EIS [EZS] Control Unit (N73)
6. Steering Column Module (N80)

The ETC [EGS] control unit takes over the actuation of the solenoid valve for modulating and shift pressure and for the shifting gears (N15/3).

The necessary pressure in relation to the torque to be transmitted, is computed from all the input signals.

The following information from other systems is processed in so doing.

Motor electronics control unit (N3/10) or CDI control unit (N3/9)

1. Request: Starting Off In 1st Gear
2. Request: Active Downshift
3. Request: Status Of Torque Converter Lockup Clutch
4. Limp-Home Mode
5. Cruise Control Operating
6. Engine Speed Limiter Active.
7. Engine Status
8. Engine Oil Status
9. Specified Torque
10. Starter Running
11. Idle Speed
12. Shift Curve Offset
13. Pedal Value
14. Inertia Fuel Shutoff
15. Targeted Gear
16. Kick-Down

Electronic selector lever module control unit (N15/5)

1. Selector Lever Position
2. Switch Position Of Transmission Mode Switch (S16/5)
3. Locking Solenoid Energized

ESP and BAS control unit (N47-5)

1. Request: Shift Into "N" (Neutral)
2. Request: Targeted Gear
3. Request: Active Downshift
4. Wheel Speeds, Direction
5. Braking Torque
6. Lateral Acceleration
7. Shift Curve Offset
8. Cruise Control OFF
9. Parking Brake Operated
10. ESP Indicator Lamp
11. ESP Brake Intervention Active
12. System Status

Electronic ignition switch control unit (N73)

1. Circuit 50 Engine Start Switch (Circuit 50)

Steering column module (N80) (With code (428a) steering wheel switch buttons)

1. Left Steering Wheel Gear Shifter (S110/2)
2. Right Steering Wheel Gear Shifter (S111/2)

Steering column module (N80)

1. Steering Wheel Gear Shifter MINUS (S110/1)
2. Steering Wheel Gear Shifter PLUS (S111/1)

The following information is output to other systems.

Instrument cluster (A1)

1. Transmission Mode Selection At Transmission Mode Switch (S16/5)
2. Selector Lever Position
3. Transmission Variant

Electronic ignition switch control unit (N73)

1. Selector Lever Position

Motor electronics control unit (N3/10) or CDI control unit (N3/9)

1. Request: Engine Torque
2. Drive Torque Control
3. Limp-Home
4. Starter Release
5. Engine Emergency Stop
6. Transmission Variant
7. Actual Gear Engaged/Target Gear
8. Transmission Mode Selection At Transmission Mode Switch (S16/5)
9. Torque Converter Lockup Clutch Status
10. Selector Lever Position

ESP and BAS control unit (N47-5)

1. Transmission Variant
2. Actual Gear Engaged/Target Gear

Scheme 152

1. Control Unit For Electronic Selector Lever Module, Location The control unit for the electronic selector lever module (N15/5) is located in the center console of the vehicle.
2. Control Unit For Electronic Selector Module, Task See «CONTROL UNIT FOR ELECTRONIC SELECTOR MODULE, TASK»(ref-172274-S15703636932005030200000) .
3. Electronic Selector Lever Module Control Unit, Design See «ELECTRONIC SELECTOR LEVER MODULE CONTROL UNIT, DESIGN»(ref-172274-S18955320552005030200000) .

Scheme 153

The electronic selector lever module control unit (N15/5) receives digital and analog input signals, actuates various components or transmits information to various control units via the Controller Area Network bus Class C (engine compartment) (CAN-C).

The selector lever positions and touch shifts carried out are detected in a non-contact manner by means of optoelectronic switches. A photoelectric barrier is closed or interrupted each time the position of the selector lever is changed.

Input signals

1. Transmission Mode Switch (S16/5)
2. Kick-Down Switch (S16/6) (Up To 5/31/02)
3. Touch Shift Module +/- (96)
4. Voltage Supply (Circuit 87)

Input and output signals

1. Data Link Connector (X11/4)

Output signals

1. R/P Locking Solenoid (89)

Via CAN-C there is a connection to the

1. Instrument Cluster (A1)
2. ME-SFI
3. ETC Control Module (N15/3)
4. ESP & BAS Control Unit (N47-5)
5. EIS [EZS] Control Unit (N73)

The following information is received via CAN-C.

ESP and BAS control unit (N47)

1. Wheel Speed And Right Rear Direction Of Rotation
2. Wheel Speed And Left Rear Direction Of Rotation
3. Set Braking Torque
4. Brake Pedal Depressed

Electronic ignition switch control unit (N73)

1. Circuit 50 Engine Start Switch (Circuit 50)
2. Circuit 15 Voltage Supply Switched UB (Battery Voltage) (Circuit 15)
3. Stop Lamp Feedback

The following information is transmitted via CAN-C

Instrument cluster (A1)

1. Selector Lever Position For Gear Display (A1p12)

Motor electronics control unit (N3/10) or CDI control unit (N3/9)

1. Selector Lever Position "P/N"

ETC [EGS] Control Unit (N15/3)

1. Selector Level Position
2. Transmission Mode Switch (S16/5)
3. Kick-Down Switch (S16/6) (Up To 5/31/02)
4. Touch Shift Module +/
5. R/P-Locking Magnet (89) Energized

Electronic ignition switch control unit (N73)

1. Selector Lever Position For Actuation Of Backup Lamp

Scheme 154

Scheme 155

1. Temperature Sensor, Location The transmission oil temperature sensor (Y31/6bl) is located in the electrical control unit (Y316) and is permanently connected to the conductor tracks.
2. Temperature Sensor, Task To measure the temperature of the transmission oil and pass the temperature to the ETC control unit (N15/3) as an input signal.
3. Temperature Sensor, Design Temperature-dependent resistor (PTC).
4. Temperature Sensor, Function See «TEMPERATURE SENSOR, FUNCTION»(ref-172274-S18578403162005030200000) .

Scheme 156

Operation

The temperature of the transmission oil has a major influence on the shift time and thus on the shift quality. It is possible to optimize the gear shifts in all temperature ranges by detecting the oil temperature.

The transmission oil temperature sensor (Y3/6b1) is connected in series with the starter lockout contact (Y3/6s1). The temperature signal is transmitted to the ETC control module (N15/3) only the dry-reed contact of the starter lockout contact (Y3/6s1) is closed.

Scheme 157

1. Selector Valve, Location The selector valve (52) is located in the valve housing of the shift plate (2a).
2. Selector Valve, Task Distributes pressure to the appropriate hydraulic components according to the selector lever position selected by the driver.

Scheme 158

1. Torque Converter Lockup Clutch, Location The torque converter lockup clutch is integrated in the torque converter.
2. Torque Converter Lockup Clutch, Task The torque converter lockup clutch minimizes the power losses of the torque converter and as a result reduces the engine speed and improves the efficiency of the transmission.
3. Torque Converter Lockup Clutch, Design The external plate carrier (16a) is connected to the impeller (P) via the cover shell (17). The internal plate carrier (16b) is connected to the turbine wheel (T).
4. Torque Converter Lockup Clutch, Function See «TORQUE CONVERTER LOCKUP CLUTCH, FUNCTION»(ref-172274-S30997590212005030200000) .

Scheme 159

Operation

When actuated by the ETC control module (N15/3), oil pressure controlled by the torque converter lockup PWM solenoid valve (Y3/6y6) is directed through the input shaft (1) to the pressure chamber behind the piston (16d). The piston presses the clutch pack (16c) together and allows torque to be transferred directly between the impeller (P) and turbine wheel (T).

The torque converter lockup clutch is activated in 5th, 4th and 3rd gears in relation to the engine speed and engine load.