printable version

general information

For more information on the design, operation and maintenance of the principles of design of AW's Guide 179 ("Automatic transmissions of modern cars") publishing ARUS.

The design of a typical AT (1 of 2)

1 - Torque 2 - Input shaft O / D 3 - Oil Pump 4 - Disc brake O / D 5 - The clutch O / D 6 - The input shaft clutch forward gears 7 - The clutch forward gears 8 - Clutch direct perception 9 - overrunning clutch O / D	10 - Disc brake mode "2" 11 - Disc brake transmission from the 2nd and higher 12 - Disc brake modes ?�L?� and ?�R?� 13 - The front row of the rear planetary assembly 14 - Back row rear planetary assembly 15 - Front planetary assembly (O / D) 16 - overrunning clutch ?��1 17 - overrunning clutch ?��2

The design of a typical AT (2 of 2)

1 - overrunning clutch O / D 2 - The clutch O / D 3 - Satellite front planetary assembly 4 - Disc brake O / D 5 - The clutch forward gears 6 - Clutch direct perception 7 - Disc brake mode "2" 8 - overrunning clutch ?��1 9 - Disc brake transmission from the 2nd and higher 10 - Disc brake modes ?�L?� and ?�R?� 11 - overrunning clutch ?��2 12 - Orbital gear front row rear planetary assembly	13 - Orbital gear back row rear planetary assembly 14 - Output shaft 15 - Satellite back row rear planetary assembly 16 - Sun gear rear planetary assembly 17 - Satellite front-row rear planetary assembly 18 - Intermediate shaft 19 - The input shaft clutch forward gears 20 - Sun gear O / D 21 - Input (primary) shaft O / D

For a complete set described in this guide can be used by cars, 4-speed (including overdrive) automatic transmissions (AT) Series 03-72LE manufactured by Aisin Warner (AW372LE).

Playing the role of an ordinary clutch breakaway torque of the car from the scene, during movement performs work on AT gear change.

The main components of the AT is a blocking converter (inverter rotation), three-row stage planetary gear and electronic-hydraulic control system. To switch gears without interrupting the flow of power in the planetary gear unit hydraulically applied multi-disc brakes (4 pcs.), Freewheel clutches (3 pcs.) And a multi-disc clutches (3 pcs.).

Switching control of transmission and torque converter lock by a special electronic control module (TCM), working in close connection with the engine control module (ECM) and continuously exchange information with the latter.

The ability to lock the torque converter when driving at cruising speed from exceeding a certain threshold value can significantly improve fuel economy by reducing engine operating speed.

The cooling radiator is integrated fluid cooler ATF, another outdoor air cooler is mounted directly in front of the radiator cooling system.

TCM controls the functioning of all the actuators AT (valve assembly, clutch, brake assembly) given the choice of one of three defined modes of transmission: ECONO (normal mode), POWER or HOLD, - see. Head Controls and operation receptions). Based on the analysis of data from various information gauges (not necessarily directly related to the proper functioning of the transmission), TCM selects the optimum in terms of efficiency, smooth shifting and so forth. Mode of operation of the AT. An integral part of the control system is a subsystem of the AT self-diagnosis - the detection of serious fault management module switches into a special emergency transmission (safe) mode with limited range switching. Switches to emergency mode allows you to drive away the car on their own a workshop to perform detailed diagnostics and necessary reconditioning. Based on data from the traditionally installed under the gas pedal sensor-switch activating the kickdown, TCM is to switch to an adjacent transmission currently used gear at full squeezing of a pedal that can significantly improve the dynamic characteristics of the car, such as when overtaking. By using a special gauge-switch N / P to start the engine can be carried out only when the selector AT lever is in the "P" or ?�N?�, which helps prevent accidental pulling away when you try to start the car.

AT only maintenance procedure, the implementation of which should be made on ?� regular basis, is to check the level of the working fluid (ATF), the order of execution which is set out in Chapter Current leaving and service. The need for regular replacement ATF is missing.

In this chapter only the most common maintenance procedures AT lying within qualification of the average mechanic-fan. The following information on the structure and principles of functioning of the individual actuators AT.

The valve assembly

The valve assembly is placed in the sump and transmission under the control of TCM controls the flow of ATF in the box. Included in the assembly of the fluid pressure control valves interconnected internal channels. Cleaning is taken from the sump Transmission Fluid (ATF) is provided strainer built-in maslozabornik pump assembly.

The design of the valve assembly AT

1 - activate the kickdown valve 2 - 3-4 shift valve 3 - Secondary control valve 4 - Damper Valve reverse gear 5 - Valve switching 2-3 6 - Valve switching 1-2 7 - Pressure Reducing Valve 8 - throttle valve 9 - Locking throttle pressure limiting valve	10 - manual switching valve 11 - solenoid valve switch A 12 - solenoid valve torque converter lock-up clutch 13 - valve modulator mode ?�L?� 14 - solenoid valve switches to 15 - The primary regulator valve 16 - Control valve torque converter 17 - Interim modulator valve

Accumulators

The main function of batteries is to provide bumpless transmission upward transmission by smoothing clutch actuation. In consideration of transmission used three close in design Battery: clutch forward gears and direct perception and disc brake gears from the 2nd and above.

The battery consists of a valve and a spring. For spring-loaded side of the valve is constantly applied rail pressure, whose effect will stack to develop the spring force and holds the valve when the assembly is in an inactive state.

The design of the battery

1 - Working Party 2 - To the inner piston-controlled component	3 - line pressure (from the manual shift valve) 4 - Side counter 5 - line pressure

When a control pressure to the corresponding actuator (clutch or multi-disk brake) the same pressure (from the manual shift valve) is applied to the process side of the valve corresponding to the battery. Under the influence of the pressure valve begins to press down, breaking and counter force exerted by the spring. On filling the working volume of the battery takes some time, by the end of which the actuator is completely switched on - the delay and ensures smooth operation controlled clutch / brake and therefore bumpless AT.

Torque converter lock

Locking clutch enables transmission of torque from the engine crankshaft directly to the input shaft O / D transmission.

Lockout occurs only cruising at a speed of over 69 km / h (43 miles / h) and the coolant temperature at least 50 ?� C. When decelerating speed below the activation threshold overdrive (O / D) transmission (69 km / h), as well as with a decrease in the coolant temperature below 50 ?� C, the blocking clutch is automatically disconnected.

Locking

When issuing a control module (TCM) corresponding command while driving on the 2nd, 3rd or 4th (O / D) transfer operation of the electromagnetic valve lockup clutch leads to opening of the drainage channel and, as a consequence of dumping of the main pressure spring side of the control slide valve torque converter. Under the influence of the main pressure (1-2 shift valve) supplied from the opposite side of the spool, there is switchable to supply the pressurized torque converter transmission fluid through a turbine at the rear side of the locking sleeve - being displaced from the opposite side through the clutch ATF pilot valve output to oil pan (transmission fluid stream, runs through the cooler ATF, while decreasing the torque converter is locked). As a result, the locking sleeve is pressed to the front cover, with it being blocked mechanically. Since the sleeve is spline fit to the turbine, from this moment the front cover, the sleeve and the turbine begin to rotate as a unit, delivering torque from the engine crankshaft directly to the input shaft O / D of the transmission.

Equipment clutch damper springs to reduce noise and vibration caused by the transmission line.

The principle of the torque converter lock

A - Reset In - line pressure C - Pressure torque converter D - Reset E - line pressure (from the valve of switching 1-2) F - Control valve torque converter G - K cooler ATF	H - E / m lockup clutch valve (On) 1 - Front Cover 2 - Turbine 3 - Pump 4 - Lock the clutch 5 - Springs 6 - Cover 7 - Working element slide number 3 8 - Working element slide number 2

Unlocking

When issuing a control module (TCM) commands to unlock the closing of the solenoid valve takes place under the influence of a spring force to develop it. As a result, overlapping drainage channels and equalizing pressure on both sides of the torque converter control valve, the latter under the action developed by spring force switches, providing supply of pressurized ATF to torque converter lockup clutch front side. As a result, the blocking clutch is pressed by the front cover, output of the last engagement with the clutch-turbine unit, - an excess amount of liquid under pressure torque converter output via a control valve in the cooler ATF and further into the sump.

Principle unlock the torque converter

A - Reset In - line pressure C - Pressure torque converter D - Reset E - line pressure (from the valve of switching 1-2) F - Control valve torque converter	G - K cooler ATF H - E / m lockup clutch valve (On) 1 - Front Cover 2 - Turbine 3 - Pump 4 - Lock the clutch 5 - Springs 6 - Cover

Cooler ATF

When you unlock the torque converter transmission generates a large amount of heat, the bulk of which are accumulated transmission fluid.

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Device Mode		?�/?? ???�. A	?�/?? ???�. AT	?�???????�?????? O/D	?�???????�?????? ???�???�???????� ???�???�???�?�
R		???	-	???	-
R		???	-	???	-
N		???	-	???	-
D	1st gear	???	-	???	???
	2nd gear	???	???	???	???
	3rd gear	-	???	???	???
	O/D	-	-	-	???
2	1st gear	???	-	???	???
	2nd gear	???	???	???	???
L	1st gear	???	-	???	???

Device Mode		?�???????�?????? ?????????????? ???????????????�????	???????????� O/D	???????????� ???�?�?????� "2"	???????????� ???�???�???�?� ???� 2-?? ?? ???�???�
R		-	-	-	-
R		???	-	-	-
N		-	-	-	-
D	1st gear	-	-	-	-
	2nd gear	-	-	-	???
	3rd gear	???	-	-	???
	O/D	???	???	-	???
2	1st gear	-	-	-	-
	2nd gear	-	-	???	???
L	1st gear	-	-	-	-

Device Mode		???????????� ???�?�???????? "L" ?? "R"		???�??. ?????�?�?� O/D	???�??. ?????�?�?� ?��1	???�??. ?????�?�?� ?��2
		?�?????�??. ?????????�????	Nar. ?????????�????
R		-	-	???	-	-
R		???	???	???	-	-
N		-	-	???	-	-
D	1st gear	-	-	???	-	???
	2nd gear	-	-	???	???	-
	3rd gear	-	-	???	-	-
	O/D	-	-	???	-	-
2	1st gear	-	-	???	-	???
	2nd gear	-	-	???	-	-
L	1st gear	???	???	???	-	-

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general information

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When the piston is released friction wheels rotate freely in the housing assembly, and the gaps between the annular plates and filled transmission fluid. When applying pressure to the piston plate tightly pressed to the disk to form a monolithic block. ATF is displaced from the clearances and by the centrifugal force through specially provided in the clutch housing channels assigned to the AT oil pan. Releasing the piston when removing the pressure is under the influence of return springs.

1 - annular plate 2 - Friction drive 3 - Return spring 4 - Piston 5 - Housing

Clutch overdrive (O / D)

Provides lock the sun gear with the holder of the satellites (carrier) Front planetary assembly.

Clutch involved in all modes of AT in all gears except overdrive and by blocking the planetary assembly transmits torque from the input shaft O / D into the transmission assembly. Special mounted in executive clutch piston, ball control provides hold pressure in the ON state and reset it by disconnecting. Slim retaining ring is used to fix all but one disk clutch, a second retaining ring is fixed hub disc brake O / D.

Clutch forward gears

It provides coupling its input shaft to the intermediate shaft of the transmission.

Clutch involved in all modes of AT in all gears forward and, through its hub transmits torque to the intermediate shaft, articulated with the rear planetary carrier assembly. Special mounted in executive clutch piston, ball control provides hold pressure in the ON state and reset it by disconnecting. Slim retaining ring is used to fix all but one disk clutch, a second retaining ring is fixed hub clutch direct perception, thus rotating with the housing front clutch transmission.

Clutch direct perception

It provides joint input shaft clutch forward gears with the sun gear.

The clutch engaged reverse gear, and the 3rd and 4th gear modes ?�R?� and ?�D?� and respectively transmits torque from the hub to its rear planetary sun gear assembly. The hub clutch direct perception rotates with the clutch housing of the front transmission, thus with simultaneous activation of both clutches provided directly (direct) transfer torque. When the clutch is involved only direct perception, the case of the front clutch transmissions continues to rotate without transmitting torque of the intermediate shaft. Special mounted in executive clutch piston, ball control provides hold pressure in the ON state and reset it by disconnecting.

Disc brake assembly

The design of multi-disc brake assemblies similar to that of clutch.

Disc brake overdrive (O / D)

Locks rotation of the front planetary sun gear assembly.

Disc brakes (have internal engagement) planted on the splines of the hub plate (have external engagement) articulated slots with AT pribolchennym the crankcase housing the brake assembly. The hub brake is connected directly to the sun gear of the front planetary assembly and when the 4-th transmission mode ?�D?� transmission is blocked with the casing brake assembly. Special mounted in executive piston brake assembly, control the ball would confine the pressure in the ON state and reset it by disconnecting. One snap ring is used for fixing the spring holder, a second retaining ring fixed working disks and plates.

Disc brake mode "2"

Locks rotation of the rear planetary sun gear assembly.

The brake is used to provide engine braking when transferring transmission mode "2". Disc brakes are planted in the clutch housing slots direct perception, articulated plate slots with the body of the central support, in turn pribolchennym to the transmission housing. When activated, the brake is locked hub clutch direct perception, having spline fit to the rear planetary sun gear assembly. Special mounted in executive piston brake assembly, control the ball would confine the pressure in the ON state and reset it by disconnecting.

Disc brake transmission from the 2nd and higher

Blocks overrunning clutch outer ring number 1, thereby preventing rotation of the sun gear counterclockwise.

Disc brakes are planted on the splines of the hub, articulated plate slots with the body of the central support, in turn pribolchennym to the transmission housing. The brake is activated in the modes ?�D?� and ?�2?� drivetrain when driving on the 2nd, 3rd and 4th (O / D) programs and its hub is also the outer ring for freewheel ?�� 1. Special mounted in the executive piston brake assembly, control the ball would confine the pressure in the ON state and reset it by disconnecting.

Disc brake modes ?�L?� and ?�R?�

Blocks holder satellites (carrier), front-row rear planetary assembly.

The brake assembly has a double piston structure, and is placed at the rear of the crankcase AT. Disc brakes are planted on the body of the satellite slots (the carrier) of the front planetary gear set, the plates are coupled with the transmission housing slots. In modes ?�L?� and ?�R?� AT brake provides carrier lock of the front planetary gear set, in both cases using both piston. ?????�?�???�?�?????�?�, ?????????�?????????�?????�?� ?? ?????????�?????�?�?�?????�?� ???????????? ?�?????????�?????? ???�????????, ???????�?????�?????�?� ???�???????? ???�?�?????�?�?????�???� ?????�???�?�?????� ???�???�?�?????? ???? ?????�???�?�???????? ???????�?????????? ?? ???�?????? ?�???? ?????? ???�???�???�?�??????.

Freewheel

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