An Automobiles fuel system

Written by Kevin Schappell


The fuel system feed your enginerepparttar gasoline/diesel it needs to run. If anyone ofrepparttar 102748 parts inrepparttar 102749 system break down your engine will not run. Let's look atrepparttar 102750 major parts ofrepparttar 102751 fuel system, Fuel tank: Basically a holding tank for your fuel. When you fill up at a gas stationrepparttar 102752 gas travels downrepparttar 102753 filler tube and intorepparttar 102754 tank. Inrepparttar 102755 tank there is a sending unit, which tellsrepparttar 102756 gas gauge how much gas is inrepparttar 102757 tank. Fuel pump: On newer carsrepparttar 102758 fuel pump is usually installed inrepparttar 102759 fuel tank. Older cars haverepparttar 102760 fuel pump attached torepparttar 102761 engine or onrepparttar 102762 frame rail betweenrepparttar 102763 tank andrepparttar 102764 engine. Ifrepparttar 102765 pump is inrepparttar 102766 tank or onrepparttar 102767 frame rail then it is electric and is run by your cars battery. Fuel pumps mounted torepparttar 102768 engine userepparttar 102769 motion ofrepparttar 102770 engine to pumprepparttar 102771 fuel Fuel filter: Clean fuel is critical to engine life and performance. Fuel injectors have tiny openings, which clog easily so filteringrepparttar 102772 fuel isrepparttar 102773 only way to prevent this. Filters can be before or afterrepparttar 102774 fuel pump, sometimes both. Fuel injectors: Most domestic cars after 1986 and earlier foreign cars came fromrepparttar 102775 factory with fuel injection. Instead of a carburetor to mixrepparttar 102776 fuel and air, a computer controls whenrepparttar 102777 fuel injectors open to let fuel intorepparttar 102778 engine. This has resulted in lower emissions and better fuel economy. The fuel injector is basically a tiny electric valve, which opens and closes with an electric signal. Inrepparttar 102779 picture below you can seerepparttar 102780 injectors towardsrepparttar 102781 outer part ofrepparttar 102782 intake. By injectingrepparttar 102783 fuel close torepparttar 102784 cylinder headrepparttar 102785 fuel stays atomized ( in tiny particles ) so it will burn better when ignited byrepparttar 102786 spark plug. Carburetors: A carburetor takesrepparttar 102787 fuel and mixes it with air without computer intervention. While simple in operation, they tend to need frequent tuning and rebuilding. This is why most newer cars have done away with carburetors in favor of fuel injection. Common Problems: I would sayrepparttar 102788 most common problem is a clogged fuel filter. Make sure you follow your manufacturers recommendations as to when you should changerepparttar 102789 fuel filter. This information should be in your ownerís manual. Symptoms include sputtering at high speeds or engine not starting at all. Always checkrepparttar 102790 ignition system first, if that's ok thenrepparttar 102791 next suspect isrepparttar 102792 fuel filter. Next most common problem isrepparttar 102793 fuel pump failing. Most modern electric fuel pumps can be heard when you turnrepparttar 102794 key on. If you don't hearrepparttar 102795 pump running and your car will not start, it could be your fuel pump. The first thing a mechanic will check isrepparttar 102796 relay, which sends power torepparttar 102797 pump. If this is operating correctly thenrepparttar 102798 pump will have to be replaced.

The Cooling System

Written by Kevin Schappell


The purpose ofrepparttar engine's cooling system is to remove excess heat fromrepparttar 102747 engine, to keeprepparttar 102748 engine operating at its most efficient temperature, and to getrepparttar 102749 engine up torepparttar 102750 correct temperature as soon as possible after starting. Ideally,repparttar 102751 cooling system keepsrepparttar 102752 engine running at its most efficient temperature no matter whatrepparttar 102753 operating conditions are. As fuel is burned inrepparttar 102754 engine, about one-third ofrepparttar 102755 energy inrepparttar 102756 fuel is converted into power. Another third goes outrepparttar 102757 exhaust pipe unused, andrepparttar 102758 remaining third becomes heat energy. A cooling system of some kind is necessary in any internal combustion engine. If no cooling system were provided, parts would melt fromrepparttar 102759 heat ofrepparttar 102760 burning fuel, andrepparttar 102761 pistons would expand so much they could not move inrepparttar 102762 cylinders (called "seize"). The cooling system of a water-cooled engine consists of:repparttar 102763 engine's water jacket, a thermostat, a water pump, a radiator and radiator cap, a cooling fan (electric or belt-driven), hoses,repparttar 102764 heater core, and usually an expansion (overflow) tank. Fuel burning engines produce enormous amounts of heat; temperatures can reach up to 4,000 degrees F whenrepparttar 102765 air-fuel mixture burns. However, normal operating temperature is about 2,000 degrees F. The cooling system removes about one-third ofrepparttar 102766 heat produced inrepparttar 102767 combustion chamber. The exhaust system takes away much ofrepparttar 102768 heat, but parts ofrepparttar 102769 engine, such asrepparttar 102770 cylinder walls, pistons, and cylinder head, absorb large amounts ofrepparttar 102771 heat. If a part ofrepparttar 102772 engine gets too hot,repparttar 102773 oil film fails to protect it. This lack of lubrication can ruinrepparttar 102774 engine. Onrepparttar 102775 other hand, if an engine runs at too low a temperature, it is inefficient,repparttar 102776 oil gets dirty (adding wear and subtracting horsepower), deposits form, and fuel mileage is poor-- not to mention exhaust emissions! For these reasons,repparttar 102777 cooling system is designed to stay out ofrepparttar 102778 action untilrepparttar 102779 engine is warmed up. There are two types of cooling systems; liquid cooling and air cooling. Most auto engines are cooled byrepparttar 102780 liquid type; air cooling is used more frequently for airplanes, motorcycles and lawnmowers. Liquid cooled engines have passages forrepparttar 102781 liquid, or coolant, throughrepparttar 102782 cylinder block and head. The coolant has to have indirect contact with such engine parts asrepparttar 102783 combustion chamber,repparttar 102784 cylinder walls, andrepparttar 102785 valve seats and guides. Running throughrepparttar 102786 passages inrepparttar 102787 engine heatsrepparttar 102788 coolant (it absorbsrepparttar 102789 heat fromrepparttar 102790 engine parts), and going throughrepparttar 102791 radiator cools it. After getting "cool" again inrepparttar 102792 radiator,repparttar 102793 coolant comes back throughrepparttar 102794 engine. This business continues as long asrepparttar 102795 engine is running, withrepparttar 102796 coolant absorbing and removingrepparttar 102797 engine's heat, andrepparttar 102798 radiator coolingrepparttar 102799 coolant. A cooling system pressure tester is used to checkrepparttar 102800 pressure inrepparttar 102801 cooling system, which allowsrepparttar 102802 mechanic to determine ifrepparttar 102803 system has any slow leaks. The leak can then be found and fixed before it causes a major problem.

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