Detailed explanation of the working principle of car parking heater
The automobile fuel heater, also known as the parking heating system, is an independent auxiliary heating system on the vehicle. It can be used after the engine is turned off, and can also provide auxiliary heating during driving. Generally divided into two types: water heating system and air heating system. According to the type of fuel, it can be divided into gasoline heating system and diesel heating system. Large trucks, construction machinery, etc. mostly use diesel air heating system, and family cars mostly use it. Petrol water heating system.
The working principle of the parking heating system is to extract a small amount of fuel from the fuel tank to the parking heater combustion chamber. The fuel is then burned in the combustion chamber to generate heat, which heats the engine coolant or air, and then dissipates the heat to the cabin through the warm air radiator. while the engine is also being warmed up. This process will consume battery power and a certain amount of fuel. Depending on the size of the heater, the amount of fuel required for one heating ranges from 0.2 liters to 0.3 liters.
The parking heating system is mainly composed of air intake supply system, fuel supply system, ignition system, cooling system and control system. Its working process can be divided into five working steps: air intake stage, fuel injection stage, mixing stage, ignition and combustion stage and heat exchange stage.
When the switch is turned on, the heater works as follows:
1. The centrifugal water pump starts pumping water for trial operation and checks whether the water path is normal;
2. After the water path is normal, the fan motor rotates to blow air into the intake pipe, and the dosing oil pump pumps oil into the combustion chamber through the input pipe;
3. Ignite the ignition plug;
4. After the fire is ignited at the head of the combustion chamber, it is completely burned at the tail and the exhaust gas is discharged through the exhaust pipe:
5. The flame sensor can sense whether the ignition is ignited according to the temperature of the exhaust gas. If it is ignited, the spark plug will be turned off;
6. The water absorbs and takes away the heat through the heat exchanger and circulates it to the engine water tank:
7. The water temperature sensor senses the temperature of the water. If it reaches the set temperature, it will shut down or reduce the combustion level:
8. The air controller can control the intake volume of combustion air to ensure combustion efficiency;
9. The fan motor can control the speed of the incoming air;
10. The overheating protection sensor can detect when there is no water or the waterway is blocked and the temperature is higher than 108 degrees, and it will automatically turn off the heater.
Since the parking heating system has good heating effect, is safe and convenient to use, and can also be operated by remote control, the car can be preheated in advance in the cold winter, which greatly improves the comfort of the car. In some alpine areas, many people They are all installed at their own expense, especially trucks and RVs used in cold areas, which are basically installed.
