إضغط لتفاصيل الإعلانات



Results 1 to 5 of 5
Share
  1. #1
    Join Date
    Jun 2010
    Location
    Cairo,Egypt
    Posts
    136
    Rep Power
    10

    Default the automatic transmitter full report

    Auto Transmitter







    the automatic transmitter components :-

    * Planetary Gear Sets which are the mechanical systems that provide the various forward gear ratios as well as reverse.
    * The Hydraulic System which uses a special transmission fluid sent under pressure by an Oil Pump through the Valve Body to control the Clutches and the Bands in order to control the planetary gear sets.
    * Seals and Gaskets are used to keep the oil where it is supposed to be and prevent it from leaking out.
    * The Torque Converter which acts like a clutch to allow the vehicle to come to a stop in gear while the engine is still running.
    * The Governor and the Modulator or Throttle Cable that monitor speed and throttle position in order to determine when to shift.
    * On newer vehicles, shift points are controlled by Computer which directs electrical solenoids to shift oil flow to the appropriate component at the right instant.

    the main principle of transmitter









    in the automatic transmitter there is

    Torque Converter

    converter takes the place of the clutch found on standard shift vehicles. It is there to allow the engine to continue running when the vehicle comes to a stop. The principle behind a torque converter is like taking a fan that is plugged into the wall and blowing air into another fan which is unplugged. If you grab the blade on the unplugged fan, you are able to hold it from turning but as soon as you let go, it will begin to speed up until it comes close to the speed of the powered fan. The difference with a torque converter is that instead of using air, it uses oil or transmission fluid, to be more precise.

    A torque converter is a large doughnut shaped device (10" to 15" in diameter) that is mounted between the engine and the transmission.
    The three elements of the torque converter are the Pump, the Typical torque converterTurbine, and the Stator. The pump is mounted directly to the converter housing which in turn is bolted directly to the engine's crankshaft and turns at engine speed. The turbine is inside the housing and is connected directly to the input shaft of the transmission providing power to move the vehicle. The stator is mounted to Torque converter internal diagrama one-way clutch so that it can spin freely in one direction but not in the other. Each of the three elements have fins mounted in them to precisely direct the flow of oil through the converter

    With the engine running, transmission fluid is pulled into the pump section and is pushed outward by centrifugal force until it reaches the turbine section which starts it turning. The fluid continues in a circular motion back towards the center of the turbine where it enters the stator. If the turbine is moving considerably slower than the pump, the fluid will make contact with the front of the stator fins which push the stator into the one way clutch and prevent it from turning. With the stator stopped, the fluid is directed by the stator fins to re-enter the pump at a "helping" angle providing a torque increase. As the speed of the turbine catches up with the pump, the fluid starts hitting the stator blades on the back-side causing the stator to turn in the same direction as the pump and turbine. As the speed increases, all three elements begin to turn at approximately the same speed.

    Since the '80s, in order to improve fuel economy, torque converters have been equipped with a lockup clutch (not shown) which locks the turbine to the pump as the vehicle speed reaches approximately 45 - 50 MPH. This lockup is controlled by computer and usually won't engage unless the transmission is in 3rd or 4th gear.


    the hydraulic system
    the Hydraulic system is a complex maze of passages and tubes that sends transmission fluid under pressure to all parts of the transmission and torque converter.


    computer control



    The computer uses sensors on the engine and transmission to detect such things as throttle position, vehicle speed, engine speed, engine load, brake pedal position, etc. to control exact shift points as well as how soft or firm the shift should be. Once the computer receives this information, it then sends signals to a solenoid pack inside the transmission. The solenoid pack contains several electrically controlled solenoids that redirect the fluid to the appropriate clutch pack or servo in order to control shifting. Computerized transmissions even learn your driving style and constantly adapt to it so that every shift is timed precisely when you would need it.
    Because of computer controls, sports models are coming out with the ability to take manual control of the transmission as though it were a stick shift, allowing the driver to select gears manually. This is accomplished on some cars by passing the shift lever through a special gate, then tapping it in one direction or the other in order to up-shift or down-shift at will. The computer monitors this activity to make sure that the driver does not select a gear that could over speed the engine and damage it.
    Another advantage to these "smart" transmissions is that they have a self diagnostic mode which can detect a problem early on and warn you with an indicator light on the dash. A technician can then plug test equipment in and retrieve a list of trouble codes that will help pinpoint where the problem is.


    Transmission Fluid Leak Causes


    As your car becomes old, the wear and tear increases and various problems start repeating. One such problem is transmission fluid leak. It can be caused due to several reasons, prominent ones being, broken seal and faulty installation. Transmission seals are made from metal or rubber. Owing to the fact that it is exposed to extreme temperatures throughout the operation of the vehicle, it experiences tremendous wear and tear, and eventually breaks down causing the fluid to leak. Faulty installation is another major cause of transmission fluid leaking. Although rare, any damage caused to the transmission case of the vehicle can also lead to leakage of transmission fluid.

    Transmission Fluid Leak Repair

    Before you initiate the repair, you will have to asses the seriousness of the problem. Depending on the damage caused and amount of fluid that is being spilled, you will have to decide whether to repair transmission fluid leak yourself or refer to a car workshop. If the problem is minor, you can use stop leak solution to seal the fluid leak. However, if it's a major leak you will have to take the car to a workshop to fix the problem. As a temporary arrangement, you can use stop leak to seal the fluid leakage. But this temporary solution will give way very soon, and you will have to seek professional expertise in order to deal with the problem, once and for all. At the workshop the professionals will asses the damage caused to the transmission system and come up with required car repair option, which may include welding the damaged part or replacing a worn out part. The transmission fluid leak cost will be determined by taking the nature of the problem into consideration. For instance, if the damaged part has to be welded, it may cost you anything between 100 - 150 egp

    important notice
    Transmission fluid leak is a major problem which can eventually cause damage to the engine, and hence should be repaired as soon as possible. If the various moving parts of the transmission system are not properly lubricated, they are bound to get worn out relatively faster. More importantly, if your vehicle uses automatic transmission fluid, which doubles up as coolant, then the damage incurred will be even greater. Although you can utilize one of the numerous oil leak prevention devices available in the market, we feel that proper maintenance of the car is a better option, to ensure that you don't experience any such car problems which would not only affect your smooth ride, but also your wallet.


  2. Facebook Comments - تعليقـك على الفيس بوك يسعدنا ويطور مجهوداتنـا


  3. Forum Ads:

  4. Forum Ads:

    اضفط هنا لمعرفة تفاصيل الإعلانات بالموقع


  5. Forum Ads:

    -->

  6. #2
    Join Date
    Nov 2007
    Location
    Arab world!
    Posts
    6,169
    Blog Entries
    4
    Rep Power
    10

  7. #3

  8. Forum Ads:

  9. #4

    Default

    Wonderful topic,
    keep the good work up ya bashmohandes.

  10. #5
    Join Date
    Apr 2012
    Location
    iraq
    Posts
    1
    Rep Power
    0

    Default

    شكرا ولكن الرابط لايعمل

  11. Forum Ads:

Similar Threads

  1. Replies: 0
    Last Post: 13-02-2013, 10:49 PM
  2. Replies: 0
    Last Post: 07-11-2011, 11:05 PM
  3. Distribution Groups - Automatic Replies from the Group
    By Mohamed Fouad in forum Microsoft
    Replies: 2
    Last Post: 14-07-2010, 09:45 AM
  4. Full Hyper-V Resources
    By mohamadoz in forum HyperV
    Replies: 2
    Last Post: 02-04-2010, 12:27 PM
  5. Replies: 0
    Last Post: 19-01-2010, 03:40 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

أقسام المنتدى

الروابط النصية

تابع جروبنا على الفيس بوك

صفحة Egypt Engineers على الفيس بوك

تابعنا على linkedin

جروبنا على الياهو جروب