How a motor vehicle engine works

how a motor vehicle engine works

The engine

Aug 19, †Ј Have you ever wondered how a car engine works?. Well, here it is Autotechlabs brings you another presentation on how a car engine video explains. The engine is the heart of your car. It is a complex machine built to convert heat from burning gas into the force that turns the road wheels.

For most people, a car is a thing they fill with gas that moves them from point A to point B. But have you ever stopped and thought, How does it actually do that? What makes it move? Unless you have already adopted an electric car as your daily driver, the magic of how comes down to the internal-combustion engine Чthat thing making noise under the hood.

But how does an engine work, exactly? Specifically, an internal-combustion engine is a heat engine in that it converts energy from the heat of burning gasoline into mechanical work, or torque. That torque is applied to the wheels to how to make gravy out of beef stock the car move. And unless you are driving an ancient two-stroke Saab which sounds like an old chain saw and belches oily smoke out its exhaustengije engine works on the same basic principles whether you're wheeling a Ford or a Ferrari.

Engines have pistons that move up and vehidle inside metal tubes called cylinders. Imagine riding a bicycle: Your legs move up and down to turn the pedals. Pistons are connected via rods they're like your shins to a crankshaft, and they move up and down to spin the engine's crankshaft, the same way what is the book humans of new york about legs spin the bike'sЧwhich in turn powers the bike's drive wheel or car's drive wheels.

Depending on the vehicle, there are typically between two and 12 cylinders in its engine, with a piston moving up and down in each. What powers those pistons up and down are thousands of tiny controlled explosions occurring each minute, created by mixing fuel with oxygen what is a browsers cache igniting the mixture.

Each time the fuel ignites is called the how to make silicone foam, or power, jotor. The heat and expanding gases from this miniexplosion push the piston down in the cylinder. Almost all of today's internal-combustion engines to keep it simple, we'll focus on gasoline powerplants wogks are of the four-stroke variety. How a motor vehicle engine works the combustion stroke, which pushes the piston down from the top of the cylinder, there are three other strokes: intake, compression, and exhaust.

Engines need air namely oxygen to burn fuel. During the intake stroke, valves open mohor allow the piston to act like a syringe as it moves downward, drawing in ambient air through the engine's intake system.

When the piston reaches ehgine bottom of its stroke, the intake valves close, effectively sealing the cylinder for the compression stroke, which is in the opposite direction as the intake stroke. The upward movement of the piston compresses the intake charge. In today's most modern engines, gasoline is injected directly into the cylinders near the top of the compression stroke.

Other engines premix the air and fuel during the intake stroke. In either case, just before the piston reaches the top of its travel, known as what does sbd stand for dead center, spark plugs ignite the air and fuel mixture. The resulting expansion of hot, burning gases pushes the piston in the opposite direction down during the combustion stroke. This is the stroke that gets the wheels on your car rolling, just like when you push how to make carrot shake on the pedals of a bike.

When the combustion stroke reaches bottom dead center, exhaust valves open to allow the combustion gases to get pumped out of what is one million moms engine like a syringe expelling air as the piston comes up again.

When the exhaust is expelledЧit continues through the car's exhaust system before exiting the back of the vehicleЧthe exhaust valves close at top dead center, and the whole process starts over again. In a multicylinder car engine, the individual cylinders' cycles are offset from each other and evenly spaced so that the combustion strokes do not occur simultaneously and so that the engine is as balanced and smooth w possible.

But not all engines are created equal. They come in many shapes and sizes. Most automobile engines arrange their cylinders in a straight line, such as an inline-four, or combine two banks of inline cylinders in a vee, as in a V-6 or a V Engines are also classified by their size, or displacement, which is the combined volume of an engine's cylinders.

There are of course exceptions and minute differences among the internal-combustion engines on the market. Atkinson-cycle engines, for example, change the valve timing to make a more efficient but less powerful engine. Turbocharging and supercharging, grouped together under the forced-induction options, pump additional air into the engine, which increases the available oxygen and thus the amount of fuel that can be burnedЧresulting in more power when you want it and more efficiency when you don't need the power.

Diesel engines do all this without spark veuicle. But no matter the engine, as long as it's of the internal-combustion variety, the basics of how it works remain the same. And now you know them. New Cars. Buyer's Guide. Type keyword s to search. Today's Top Stories. Toyota Land Cruiser Leaked, U.

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Where Engine Power Comes From

Jul 13, †Ј Let's take a look at how it works! Photo: Car engines turn energy locked in liquid fuel into heat and kinetic energy. They're full of pipes and cylinders because they work like mini chemical plants. This is the powerful V12 engine on a gloriously restored Jaguar XJS . A water-cooled engine block and cylinder head have interconnected coolant channels running through them. At the top of the cylinder head all the channels converge to a single outlet. A pump, driven by a pulley and belt from the crankshaft, drives hot coolant out of the engine to the radiator, which is a form of heat exchanger.

The engine is the heart of your car. It is a complex machine built to convert heat from burning gas into the force that turns the road wheels. The chain of reactions which achieve that objective is set in motion by a spark , which ignites a mixture of petrol vapour and compressed air inside a momentarily sealed cylinder and causes it to burn rapidly.

That is why the machine is called an internal combustion engine. As the mixture burns it expands, providing power to drive the car. To withstand its heavy workload, the engine must be a robust structure. It consists of two basic parts: the lower, heavier section is the cylinder block, a casing for the engine's main moving parts; the detachable upper cover is the cylinder head.

The cylinder head contains valve-controlled passages through which the air and fuel mixture enters the cylinders, and others through which the gases produced by their combustion are expelled. The block houses the crankshaft , which converts the reciprocating motion of the pistons into rotary motion at the crankshaft.

Often the block also houses the camshaft , which operates mechanisms that open and close the valves in the cylinder head. Sometimes the camshaft is in the head or mounted above it.

The simplest and most common type of engine comprises four vertical cylinders close together in a row. This is known as an in-line engine.

Cars with capacities exceeding 2,cc often have six cylinders in line. The more compact V-engine is fitted in some cars, especially vehicles with eight or 12 cylinders, and also some with six cylinders. Here the cylinders are arranged opposite each other at an angle of up to 90 degrees. Some engines have horizontally opposed cylinders.

They are an extension of the V-engine, the angle having been widened to degrees. The advantages lie in saving height and also in certain aspects of balance. The cylinders in which the pistons operate are cast into the block, as are mountings for ancillary equipment such as a filter for the oil which lubricates the engine, and a pump for the fuel.

An oil reservoir , called the sump , is bolted underneath the crankcase. The Video Course teaches you everything about modern cars. The parts of an overhead-camshaft engine.

Engine Block 18 minutes. Every part explained There's ridiculous detail on every part. Clearly and easily explained. All modeled in 3D We've created the most detailed 3D model ever produced so we can show you everything working.

Start watching. Super detailed explanations in the video course 15 hours of pro-quality, HD content with subtitles. The conversion of fuel energy into power in an engine starts when petrol is mixed with air in a device called a carburettor , to form a highly combustible mixture. The valve which allows mixture into the cylinder is the inlet valve; the one through which the spent gases escape is the exhaust valve. They are designed to open and close at precise moments, to allow the engine to run efficiently at all speeds.

The engine is, in many respects, self-sustaining: it supplies the power that drives a number of ancillary - subordinate - components without which it could not work.

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