If it is difficult to start hot, first check the fuel pressure. Connect the fuel pressure gauge to the fuel line first, then start the engine and measure the fuel pressure. If the fuel pressure is too high, the pressure regulator should be replaced; if the pressure is too low, try to clamp the return hose. In this case, if the fuel pressure rises to the normal value, the fuel pressure regulator is damaged, or the fuel can be checked. Pumps and fuel filters. After stop, check the fuel pressure should be maintained at the specified value, otherwise the injector leakage, resulting in over-rich mixture.
If the cold start is difficult, it may be that the cold start injector is blocked by the colloid, which may affect the quality of the spray atomization; or the cold start injector may not work properly or the thermal time switch may be short-circuited or open circuited. If it is an open circuit, control the cold start injector to inject too much fuel and cause start-up difficulties; if it is a short circuit, the cold start injector will not work and it will cause difficulty in starting.
In addition, there may be fuel injector failures. Injector faults usually manifest as: injector nozzle is blocked, carbon deposit or lax seal causes drip, resulting in too small or too large gas mixture. When testing, you can start the engine first and listen carefully to the sound of each injector. If you can't hear the sound, you should check the wiring connector, fuel injector, etc. Then you can use a multimeter to measure the resistance between the injector terminals if the resistance If the value does not match the specified value, replace the injector. Finally, you can check the injector fuel injection, the value should be within the normal range, and the difference between the injection of each cylinder is less than 5cm.
If the engine can not be started at all, and there is no sign of ignition, it is generally due to fuel injection, which needs to be checked in two ways:
Speed ​​signal system. The engine speed and crankshaft position sensor detect the speed signal and provide the crankshaft position signal when the engine is working, and serve as the main basis and basis for the control system to perform various controls. If the sensor or its circuit fails, the electronic control unit cannot receive the speed signal and the crankshaft position signal, and the fuel injection and ignition timing cannot be properly controlled, and the spark plug will not flash over.
Fuel pump and control circuit. If the fuel pump or the control circuit fails, the fuel may not be ejected normally or it may not start even if the injector is operating normally. You can check the pressure in the inlet hose. If there is pressure in the hose and you hear the sound of oil return, it means there is no problem with the fuel pump. Otherwise, you can check the fuel pump again. If the fuel pump is working properly, check the control circuit, including fuses, main relays, fuel pump relays, resistors, and wiring and connectors. After these careful inspections, you can generally find the fault.
1. Security
Electric tricycles are a safer means of transportation than ordinary bicycles. They use a safety system for motor vehicles, which has strong safety and prevents accidents caused by improper operation, which can better ensure the safety of passengers.
2. Comfort
Electric tricycles have good comfort, adopt a brand new frame structure design, effectively improve the stability of the vehicle, and have sufficient internal space to meet the various needs of passengers.
3. Economy
The economy of electric tricycles is also excellent, with energy-saving and environmental protection characteristics, more convenient operation, longer service life, and can help users reduce operating costs. Long term use is more conducive to saving expenses.
4. Environmental friendliness
Electric tricycles have the characteristics of energy conservation and environmental protection. They have low fuel consumption and emit less air pollutants, which can effectively reduce environmental pollution and help protect the environment. They can also help users reduce energy consumption.
5. Portability
Electric tricycles also have good portability, adopting advanced design that can reduce the body size and make the vehicle more flexible. They can easily pass through narrow intersections and climb slopes, effectively meeting the travel needs of users.
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