July 31 2023

How an engine works, study dry parts of an automobile engine and get a general idea of ​​the engine.

First, understand how cooling system works and properly cool hot parts of engine. The cooling system ensures that various parts of engine are within their respective operating range. The temperature of gas in cylinder is very, very high in combustion process of engine, components that are in direct contact with high temperature gas, such as cylinder block, cylinder head, piston, valve, etc., if not cooled in time, will cause engine overheating, work process wear, increased wear, etc. Therefore, engine temperature should not be too high, but engine temperature is too low, which is also unfavorable, which will lead to a decrease in engine power, an increase in fuel consumption, and an increase in wear. Thus, cooling system must be able to properly cool engine in order to keep engine running within its normal operating range and prevent it from overheating and overcooling. The current engine uses forced water cooling,

Here I will introduce you to principle of cooling. First, antifreeze in radiator is pumped by a water pump and enters water jacket of engine block and cylinder head. After absorbing heat of engine, it flows back to radiator. The car moves. During process, relative air flow plus suction effect of fan , air passes through radiator at high speed, so that cooling water is cooled, heat is dissipated into atmosphere, and cooled water is sent back to inside of engine, so that water circulates continuously. The engine is constantly cooling. Let's look at main device of cooling system. First, antifreeze is an indispensable heat sink for normal operation of engine. A good antifreeze must match antifreeze and anti-high temperature (that is, anti-opening), which requires antifreeze. High boiling point, anti-scale function and can not cause corrosion of engine parts, so antifreeze is not a simple cooling water, so I suggest that you replace it according to replacement. manufacturer cycle. The second is to say that radiator The water tank mainly includes a water inlet chamber, a water outlet chamber and a radiator core. Water flows in radiator core, and air passes outside radiator core. The hot water is cooled through air, and air absorbs heat from water. The temperature rises, so water tank is a heat exchanger. Let's talk about bottom cover of water tank, which has function of adjusting pressure of water tank Under normal circumstances, valve is closed to prevent water from flowing out When internal pressure of cooling system is too high or too low, automatic valve opens to cooling system communicates with atmosphere to maintain stable pressure. Water tank and kettle: When cooling water is heated and expanded, excess water in radiator will flow into kettle, and when temperature drops, a certain level of vacuum is created in water tank, and water in kettle is sucked back into water tank, so that tank for water will always be full.

Water pump. The function of water pump is to increase pressure of water and circulate it. Thermostat: This is a key component that controls volume and circulation of engine coolant. When engine is cold, thermostat is closed and passage to water tank is closed. This means that no water passes through water tank and water circulates in a small way, so that engine heats up quickly . when water temperature rises to a certain temperature, thermostats open fully. at this time, water enters water tank for cooling. this is a long engine cycle and fan will also run during this time.

Fan: The fan is installed on back of water tank. As fan rotates, it creates air suction to speed up cooling of water tank. If you want to have a general idea of ​​the engine, I will post a few more topics on other engine systems. You can leave a message for discussion and sharing. Don't forget to follow me