A. Liquefied petroleum gas contains non-volatile substances, which are easy to damage the diaphragm and seal. Therefore, the sewage outlet should be opened once a month to remove liquefied petroleum gas deposits.
B, work with gasoline for at least 20 minutes every day to keep the gasoline engine in good working condition, otherwise it will reduce the service life of the valve seat due to long-term lack of lubrication.
C. When starting the engine with gasoline, just put the change-over switch in the "gasoline" position, but when starting with liquefied petroleum gas, the gasoline in the carburetor should be burned out first. Therefore, it is necessary to put the change-over switch in the middle position (that is, the position where neither gas nor oil is supplied), and then switch it to the "LPG" position after the gasoline in the carburetor is burned.
D. If liquefied petroleum gas is not used for a long time, the liquefied petroleum gas in the pipeline and evaporator must be burned out or discharged, and the drain hole of the evaporator should be opened to discharge dirty liquid, and then the evaporator should be cleaned as needed; Otherwise, the nonvolatile matter in LPG will deposit on the seal and diaphragm, and corrode the seal and diaphragm.
E. The vehicle should clean the mixer once every 2000km, check and adjust the emission of the engine, remove the pipeline filter, and then blow the dirt in the pipeline filter with compressed air to prevent the airway from being blocked.
F. The adjustment method of LPG device is as follows: After the engine works, the opening of LPG regulating valve gradually decreases from large to small until the engine runs normally; Then adjust the idle bolt on the evaporator so that when the engine is idling or the air-fuel ratio of mixed gas is1200r/min-1600r/min, the emissions of CO and HC are < 1% and < 300× 10-6 respectively.
G. attention must be paid to the quality of liquefied petroleum gas for vehicles. The contents of butadiene and sulfur in imported LPG and domestic LPG should be less than 0.5% and 0.0 15% respectively.
H. If LPG leakage is found while the vehicle is running, the LPG switch should be turned off immediately, and the manual switch of the liquid outlet valve on the liquid storage tank should be turned off. Then, all fasteners and pipe joints should be checked for looseness and leakage, and repaired in time. The car should run on gasoline if the fault is not eliminated.
Key points of using dual-fuel vehicles
Adopting clean energy and changing the composition of automobile fuel is one of the most effective ways to improve environmental quality. Therefore, all countries in the world are actively promoting the application of gas vehicles. IPG- gasoline dual-fuel vehicle is a transitional product to promote gas vehicle technology. In order to better popularize the use technology of dual-fuel vehicles and promote the wide application of clean vehicles, the main points of use and troubleshooting of IPG- gasoline dual-fuel vehicles are introduced as follows.
1 routine maintenance
A. The modified vehicles should be put into the factory for regular maintenance, otherwise the parts may be damaged or the service performance of LPG system may be reduced.
B. Remove the LPG fuel filter every 7,000 kilometers, and backwash it with high-pressure gas to wash away the dirt on it, so as not to block the gas. Replace the fuel filter element every two years.
C regularly check the condition of each pipeline and joint of the fuel system, and there shall be no leakage.
D. If the LPG pipeline must be dismantled for engine maintenance, clean cotton cloth should be used to block the pipe joint to prevent foreign objects from entering and damaging related parts.
E according to the inspection regulations for pressure vessels, gas cylinders must be inspected once every two years.
2 Handling of abnormal situations during driving
A. If the LPG-gasoline dual-fuel vehicle is abnormal during driving, it should stop immediately and take the following safety measures: turn off the engine (turn off the electromagnetic valve), open the protective cover of the combined valve of LPG gas tank, and turn off the LPG outflow valve (red valve); If there are passengers on the bus, let them off; Immediately notify the professional refitting factory, follow the arrangement of the professional refitting factory technicians, and start the engine after the technicians make necessary maintenance.
B. If you smell liquefied petroleum gas or find that the engine is not working normally (including the engine is not working), you should stop immediately and then take the safety measures mentioned in item A. ..
C in case of traffic accident, take the safety measures mentioned in item a immediately.
D when the car catches fire during driving or due to traffic accidents, the safety measures mentioned in item a should be taken immediately, and then the fire extinguisher on the car should be used to put out the fire, and report to the nearest fire brigade and professional refitting factory in time, and obey the instructions of the on-site firefighters and technical personnel of the professional refitting factory.
Common faults and troubleshooting of LPG- gasoline dual-fuel vehicle
3. 1 There is no signal from the fuel transfer switch.
Turn on the power of the car. Under normal circumstances, when the fuel switch is turned to oil, the gasoline indicator light, LPG indicator light and liquid level indicator light are on. If the engine is not started, the liquid level indicator will light up after 1s-3s. If you turn on the car power and all the lights go out, it means that the line is open and the current does not enter the transfer switch. Check whether the power cord is connected properly, whether the fuse is in good condition, whether the plug of the transfer switch is inserted properly and whether the transfer switch is damaged. If only the liquid level indicator light does not light up, and the car is still not lit when it is refueled, it should be maintained in the factory to check whether the liquid level sensor and signal line plug are in good condition.
3.2 The engine cannot be started.
Under normal circumstances, when the fuel transfer switch is turned on, you should hear a "click", which is the sound of the solenoid valve starting. If you can't hear it, it means that the solenoid valve is dead and the engine can't start. Check the wiring and plug.
3.3 Idle speed is unstable
When LPG is running, the idle speed of cold car is too low or unstable, and the speed may be normal after the temperature is normal; If the idle speed of the hot car is still unstable, adjust the idle speed adjusting screw of the gas system or the adjusting screw on the carburetor.
3.4 The engine lacks power when using liquefied petroleum gas.
Check whether the power valve is improperly adjusted; Whether the gas pipeline is broken or blocked, and whether the joint is loose; Whether the LPG filter is too dirty; Whether the evaporator hot water pipe works normally; Whether there is residual liquid in the pressure reducing valve.
3.5 Too much fuel consumption
Check and adjust the power valve and idle speed adjusting screw, and clean the air filter.
4 Matters needing attention in overhauling dual-fuel vehicles
A. remove the surrounding combustibles at any time.
B. When pipelines, gasification devices and other liquefied gas system devices need to be dismantled, the gas device modification plant must be informed;
C. During the welding operation, the outlet valve of the gas tank must be closed, and the liquefied petroleum gas in the pipeline will be burned out until the engine is automatically shut down, and then the operation can be started.
D. When overhauling, try to stay away from the fire source. When working at night, matches, lighters, etc. It should not be used as a substitute for lighting, and when using lighting, it should be as far away as possible.