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A Familiarization to Speed Governor

A Familiarization to Speed Governor. Anil Chhikara Motor Licensing Officer Transport Department GNCT, Delhi. SPEED LIMITER. CABLE MECHANISM TYPE FUEL MANAGEMENT TYPE. SPEED GOVERNOR. Also called as SPEED LIMITER DEVICE(SLD) ELECTRONIC SPEED GOVERNOR (ESG)

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A Familiarization to Speed Governor

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  1. AFamiliarization to Speed Governor Anil Chhikara Motor Licensing Officer Transport Department GNCT, Delhi

  2. SPEED LIMITER CABLE MECHANISM TYPE FUEL MANAGEMENT TYPE

  3. SPEED GOVERNOR Also called as • SPEED LIMITER DEVICE(SLD) • ELECTRONIC SPEED GOVERNOR (ESG) • SPEED CONTROL DEVICE (SCD)

  4. DEFINITION • Speed limiting device has primary function to control the fuel feed to the engine in order to limit the speed of the vehicle to a specified value without effecting the other performance parameter of the vehicle .

  5. TYPES OF SPEED GOVERNOR

  6. SPEED SENSOR ELECTRONIC CONTROL UNIT ACTUATORS WIRING HARNESS MAIN COMPONENTS

  7. SPEED SENSOR • REED SWITCH TYPE –redundant/non reliable technology • HALL EFFECT TYPE – latest / reliable technology

  8. The Hall element is a small semiconductor plate when a current is pass through it in the presence of magnetic field generate voltage . This voltage is proportional to current and the magnetic field. This generation of voltage is called Hall effect. Hall Effect Sensor HALL EFFCT SENSOR Hall Effect Sensor

  9. This is an electronic circuit contains an array of resistance and capacitors with a 32 bit microcontroller, where all the input signal are analyzed and passing through the whole algorithms of software then a suitable out put is generated for final control elements called Actuator. ELECTRONIC CONTROL UNIT

  10. The actuator is a translation of the converted controlled signal in to action . It is an energy conversion device having an electrical input as signal and force and displacement as an output. Mechanical Electrical Solenoid Actuators

  11. Vehicle speed should not cross the set speed if any of the below condition occurred. If sensor is bypassed If ECU is bypassed If wiring is bypassed If complete system is bypassed TEMPER PROOFNESS

  12. MECHANISM OF CABLE TYPE SPEED LIMITER

  13. Regulation of speed of vehicles • Motor Vehicle Act , 1988 Sections 183,112,184,66 • Central Motor Vehicle Rules, 1989 , Rule 118 • Delhi Gazette Notification F. No PCO/STA/II/2001PF-2/194 Dated 24 February 2003 & subsequent guidelines dated 17-02-2007 • SLD Standards AIS 018, IS :10250, IS : 9000

  14. REGULATION /ENFORCEMENT ON ROADS • In no case transport vehicle should run above 40 kmph in Delhi roads. • ESG should not be tempered . • Seals of ESG should be intact. • ESG should not be removed . • Annual Maintenance Contract /History card should be kept along the vehicle documents.

  15. MAINTENANCE OF ESG • Quarterly calibration and maintenance services are mandatory. • No road side mechanic /unauthorized technicians are allowed to repair the ESG. • In case ESG defective the vehicle is not allowed to ply on hire – reward purpose. • The operator / driver may get repairs/correction from authorized dealer workshops.

  16. Gear Box Sealing locations Location inside driver cabin Electronic sensor cable ECU Accelerator Pedal Accelerator linkages Actuator Motor Engine Speed sensor Location Inside cabin or under chasses.

  17. Gear Box Electronic By-passing with intact seals By pass switch Location inside driver cabin Electronic sensor cable ECU Accelerator Pedal Accelerator linkages Actuator Motor Engine Speed sensor Location Inside cabin or under chasses.

  18. Tempering of the SLD • Main seals are located at the sub - assemblies i.e. speed sensor, ECU & Actuator Motor • The other seals are fixed at accelerator linkages depending upon model of ESG & vehicle which can be additional one or two. • The possibility of electronic tempering may not be ruled out even the seals are intact, if the insulation of the sensor pulse wire is sheared off and the earthed with the help of shunt (additional piece of wire) and with the help of a switch located at convenient reach of driver. • The driver can by-pass the speed governor and the vehicle speed can shoot up to his desire. • In case some other tempering is carried out the chances of SLD at working mode will not be possible and will damage the electronic components.

  19. SEAL LOCATIONS - a • At gear box / speed sensor

  20. SEAL LOCATION -b • At ECU

  21. SEAL LOCATION- c • At throttle / linkages

  22. THANKING YOU

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