Basic mechanics: how the clutch of a car work?

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Basic mechanics: how the clutch of a car work?

Although you use it daily and many times per kilometer, maybe not you ever stopped to think how it acts in the whole car. So, this time, in our subsection basic mechanics, we tell you how the clutch of a manual car works.

When you start the engine, it has been idle about 1,000 RPM. But for the pair passes through the transmission to the drive wheels, something has to ‘connect’ block and transmission … but not permanently (because if not, the wheels all the time or the engine calarĂ­a as superior braking would move) . That element connecting both elements is the clutch.



Basic parts clutch

These are the basic parts of a car clutch manual gearbox.

When you are in neutral, the engine turns ‘free’ and the vehicle is not moved by more than hasten (see how the gasoline engine works). So when you engranas the first and lift a little left foot, clutch gearbox coupled with the pinion and movement of the crankshaft is transmitted to the wheels. But of course, as the former is at once short and we must use the remaining relations (second, third, fourth, fifth …) as you need less power and more speed, between each clutch to disengage it is depressed, is ie to ‘disconnect’ the set on time and for a few moments to select different gears (click here to see how does a manual gearbox) before the clutch again (lift the pedal). So the left pedal have to step up relations both as to reduce.

Cars use a friction clutch that works by fluid (hydraulic) or what is more common, with a cable. A ‘pressure plate’ bolted to the flywheel exerts constant force by a diaphragm spring on the transmission plate. Many older vehicles have a number of regulatory springs back pressure plate, instead of a diaphragm spring.

The transmission plate (or friction) operates in a splined input shaft, through which power is transmitted to the gearbox. The plate has friction linings, similar to brake linings on both sides. This allows the transmission to run smoothly when the clutch is engaged.



Thus the clutch is operated from the left pedal.

When ‘deactuates’ the clutch (the pedal is released), one arm pushes another element against the center of the diaphragm spring, which releases the clamping pressure. The outer part of the pressure plate having a friction surface, and not subject to transmission plate with the flywheel, so that the power transmission is interrupted and another gear engageable.

In a hydraulic clutch, the pressure on the left pedal activates a master cylinder in a piston which transmits force through a conduit filled with liquid to a housing mounted clutch slave cylinder. The auxiliary cylinder piston is connected to the ‘release arm’ clutch.
Clutch parts

The modern clutch has four main components: the cover plate (which incorporates a diaphragm spring), the pressure plate, the transmission plate and the collar.

The cover plate is bolted to the flywheel and the pressure plate puts pressure on the plate transmission through the diaphragm spring or in old cars, through regulatory springs.

The transmission plate works on an axis between the pressure plate and the flywheel. This is faced on each side, with a friction material that holds the pressure plate and the flywheel when fully engaged. It is slideable a controlled amount when the clutch pedal is released partially, allowing transmission work well. It is what is known as ‘half-clutch’.

The collar is pushed hard against the diaphragm spring, both hydraulically and by a cable and a lever, releasing the spring load to interrupt transmission of energy.
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