Apr 152013
 

These are integrated to the manual transmission with no special modifications to the clutch and the internal part of the gear, only the gearbox is changed to permit the fastening of the hydraulic actuators that control the clutch and the gear engagement selection. The clutch pedal has been eliminated, therefore for a breakaway start only the accelerator pedal is used. By means of an electro-hydraulic group, the electronic control unit manages gear engagement both in semi-automatic and automatic mode.

Semiautomatic, or manual, the driver makes a direct gear change by activating the lever on the centre console or through the buttons on the steering wheel.

Automatic, also called “city”, in this configuration it is the system that makes the decision as to when to change gear. The advantages are: the driver does not have to use the clutch pedal and the gear shift lever, but is not deprived of the pleasure of driving that comes from direct control of transmission.

The CFC 208 is set to

  • acquire the signals coming from the different sensors
  • interface with the engine control unit (Motronic M7.3.1)
  • control the hydraulic system
  • manage the information display and buzzer

The CFC 208F input signals

  • rpm, (from rev. counter through Bosch Motronic control unit M7.3.1)
  • gearbox input revs
  • car speed (information to CAN line)
  • clutch actuator position
  • selector actuator position
  • engagement actuator position
  • key in travel position
  • door switch status driver side
  • brake pedal switch status
  • electro-hydraulic group oil pressure
  • CAN line signal (position of accelerator pedal, engine torque, water temperature, etc.)
  • gear change request from buttons or lever
  • +50 engine ignition.

The interface with C.C.M. M7.3.1 is managed on the CAN line. To control the hydraulic actuation sub-system the CFC 208F has

  • 1 output to adjust the proportional flow-rate solenoid valve for clutch control
  • 2 outputs to adjust the proportional pressure solenoid valve for gear engagement control
  • 2 outputs to control the on/off solenoid valves to control selection
  • 1 output to control the electric pump
  • 1 output to control the ignition relay

The CFC 208F also gives the start enable.

Selespeed Alfa Romeo 147 functional diagram

Selespeed Alfa Romeo 147 functional diagram

Description

  1. Gear selection lever switch
  2. Engine rpm sensor (CAN line from CCM)
  3. Car speed signal on CAN line from ABS
  4. Gear shift buttons
  5. Brake pedal switch
  6. Oil pressure sensor
  7. Door switch driver side
  8. City button
  9. Gearbox input revs sensor
  10. Clutch position sensor
  11. Gear selection position sensor
  12. Gear engagement position sensor
  13. DVE motorised throttle case ( CAN line from CCM)
  14. Accelerator pedal potentiometer (CAN line from CCM)
  15. Pressure proportional solenoid valves ( 2)
  16. On-off solenoid valves (2)
  17. Flow rate proportional solenoid valve
  18. Electric pump
  19. Buzzer
  20. On-board panel
  21. Diagnostics socket
  22. Start enable relay
 Posted by at 10:19 pm

  8 Responses to “Selespeed System – Components”

  1. for 2 months, my car 2012 alfa romew 147 selespeed, the Gear can not engage R-1 position and show that “selespeed system failure”

    I could not find any garage to repair that alfa selespeed problem in Auckland New Zealand at all.

  2. I have a 159 2.2 jts 2007 with 66.000 km and the problem is that after driving the car for 30 minutes de gear goes to only 1,2, and 3 and says “controlar cambio” and then if i stop de car i can´t move until it is cold again.

    if i connect the car to yhe computer the only diagnostic is fail P0914.

    can you help me with this problem?

    regards
    Hermann Neuling

  3. Hi admin
    Many thanks for setting up this site, and providing us with all the information.
    Will you at some point write an article about the various differences and changes that there are in the Selespeed versions and system ?
    Say the early and late 156 systems, the 147 / GT and the GTA etc.
    Maybe even the larger family of hydraulic systems of F1, Cambiocorsa, and Doulogic. :)

  4. Hoping someone with some serious knowledge might be able to help me out.

    So.. some background.

    I am fitting a Fiat coupe 20v Turbo into an Alfa Romeo 147.
    This was previously a standard Twinspark with no Selespeed.

    I am looking to retrofit a partial selespeed system so that i can have the gear selection in the infocentre on the dash. What would i need at a bare minimum to see this through to the end??

    • In standard case of inserting selespeed to previously manual 2.0 TS you would need:
      -Actuator
      -Gearbox computer (selespeed comp)
      -ECU from the selespeed car because ECU and selespeed computer work together
      -Actual gearbox should be the same as the manual one, but please confirm this on alfaowner forums.
      -And of course you would need to cover all mechanical differences (clutch pedal, gear leaver and stuff)

      In your particular case I believe that hardest challenge would be to make selespeed gearbox computer to work with 20v Turbo ECU

      Please post this to alfaowner forum too, there are far more experienced people with this then we are.

      Best regards,
      Admin team