The antifreeze prevents the water from freezing, at for example, minus five degrees Celsius and it's very very important, that we do have the antifreeze in the engine. These systems may use smaller radiators or thin lightweight radiators and engine designs that have air cooled areas to dissipate heat. The flow then, is going to the radiator and we're cooling that cooling water down, because this fan is driven from the engine, it is blowing the air across the radiator, the air is symbolized by the white arrows, and we blow the air across the radiator, cool the cooling water down, and we can see at the bottom here, we got blue arrows again, so we've cooled, the cooling water down, slightly. You can accept or refuse the cookies by clicking on the options shown. Presence of water passage attenuates the combustion noise. There are various cooling systems are available out there. Cold weather starting requires use of anti-freeze solutions. A water-cooled engine block and cylinder head have interconnected coolant channels running through them. This is an indirect cooling process, where actual cooling thing that is air is not directly cooling the system. So rather than using this pipe here, we're sending the flow, the other way and we're cooling the cooling water down. When the wax becomes hot, it turns to liquid and when it turns to liquid, it requires more volumetric space, or is of a larger volume and that larger volume will push a rod, out of the charge cylinder and it will actually close our secondary valve or our bypass valve. An automobiles Cooling system is to maintain the engines temperature at optimal levels. I'll se if I can get an arrow, there we go. We've also got a jacket water pump, there's this item. We have a cooling water pump, it's this pump here, it's sucking from the jackets of the engine and then we're going to send that cooling water to a thermostat. Control of cooling system … When the cooling water becomes cold again, the rod, here, will retract, because the wax within the charge cylinder has a smaller volume and requires less space, so the rod retracts upwards, the bypass valve opens, and that means we are not sending cooling water to the radiator. If we don't have this tank, then what's actually going to happen is the cooling water will expand, it will pass through a valve here, come out and just leap down the radiator or through the pipe and then leap down. When the charge cylinder becomes hot, the wax melts, becomes liquid, it's volume expands, it pushes the rod downwards and that then, closes our bypass valve. We'll look at the thermostat in more detail later, so don't worry too much about that now, but the cooling water is coming down and it is bypassing the heat exchanger, or the radiator. This position though, of the thermostat as it is now, I'll see if I can get it somewhere in between. Thanks very much for your time.We use cookies to ensure that we give you the best experience on our website. It will open and close a relative amount, based upon the engine temperature. This water absorbs the heat from the engine and is exhausted overboard. In order to protect the engine from freezing, we will add antifreeze into the cooling water system. So this rod here, is from there to there, it actually goes up into the charge cylinder.
We can see that the arrows are flowing around the combustion space or around the cylinders, that's why we call it a jacket water system. So if the engine is running very very hot, the thermostat will be fully open. All Rights Reserved. Advantages. As you can see, we are proportionately regulating the response of the thermostat, in accordance with engine cooling water temperature. 1. So hopefully now you understand how the cooling water system works. 3 Types Of Cooling System 4 Air Cooling System.