Page 310 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

L. P. G. A multi valve is fitted on the tack. This valve is used to fill the gaps in the tank, forward the gas in the tank,
prevent gas leakage and show the gas level in the tank. Next in this valve Components include:
• Filler intake and manually closable filler closing tap to fill the tank with gas.
• Filler stop valve to stop the gas filling operation after filling the tank to a certain level.

• Check valve provided to prevent gas leakage.
• A gauge on the top surface of the tank to indicate the level of gas in the tank and pointer, consists of float,
pinion gear, gear, permanent magnet and metal diaphragm mounted inside the multi valve body. In Tank.
L.P.G. of gas when the temperature rises after filling 80% + 5% limit in tank to avoid tank explosion due to
volume expansion L. P. G. It has to be paid. L more than 80% of tank capacity. P. G. When filling the tank, the
multivalve stops the flow of gas beyond 80%. A multivalve prevents gas from escaping from the tank when the
gas tube supplying the engine breaks in an accident.

2 High Pressure Tube: High pressure tubes of annealed copper are used to convey the gas from the tack to
the solenoid valve and from the solenoid valve to the pressure reducer. The working pressure of these tubes
is 45 bar and they are connected with the help of special union. They are fitted with clips in alignment so that
they are separated from the exhaust pipe and the car body.
3 Gas-Petrol Change Over Switch: Switching on Gas Supply System or Petrol Fuel Supply System

A push button type electric switch is provided for this. This switch is mounted on the dash board so that it can
be easily operated by the driver from the driving seat.
4 L. P. G. Solenoid Valve: This L is the element acting on the electromagnet. Figure no. It has a structure as
shown in Fig. 22.11 B. L. P. G. An electromagnetic spring loaded valve L is fitted on the gas outlet path of the
solenoid valve. When the engine is off, or petrol is being supplied to it, L P. G. The valve is seated in its seat
by spring pressure in the outlet passage to keep the supply closed. When the gas-petrol changeover switch
is turned on to gas, the electromagnetic coil is energized by the battery and pulled on the valve and the gas
outlet path is opened and gas is supplied to the pressure reducer. The valve is fitted with its bracket in a vertical
position in the engine compartment but away from the engine heat.

5 Petrol Solenoid Valve: L. P. G. A petrol solenoid valve operating on an electromagnet, similar to a solenoid
valve, is constructed as shown in Fig. No. 22.11 A. This valve is fitted between the petrol fuel pump and the
carburettor. When the gas-petrol changeover switch is turned on the petrol side, the supply of petrol to the
carburettor starts and the supply of gas stops.
6 Pressure Reducer-Vaporizer: L. P. G. coming in liquid state from solenoid valve. L.P.G. A pressure reducer
and vaporizer element is provided to reduce the pressure of the fuel and convert it into steam and is fitted at
the carburetor side as shown in figure no.22.6. An inlet and an outlet water heating tube (pipe) are fitted on it
to circulate the hot water from the engine cooling system through the body. (See Insect No. 26.6.)

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CITS : Automotive - Mechanic Diesel - Lesson 88 - 93 CITS : Automotive - Mechanic Diesel - Lesson 88 - 93