Today’s vehicles are equipped with clutches. Clutch is a mechanical device use to engage and disengage power transmission at will. Many of today’s cars are operated by a fluid or the hydraulic clutch system. There are four main components of clutch. They are the cover plate, pressure plate, driven plate, and the release bearing.
Whenever the clutch pedal is pressed, the hydraulic piston pushes the fork, which throw-out the bearing against the diaphragm spring. The clutch disc is disconnected from the flywheel attached to the engine whenever spring is pushed.
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Established in 1995, MZW is a small company passionate on delivering products that will help every car owners in their daily driving. MZW focuses on product aftermarket auto parts for motor vehicles of all types, year, and models.
In China’s aftermarket industry, MZW is known as one of the top automotive clutch manufactures. We give our partners honest solutions for their nuisances. Our product catalog numbers to over 50,000 units everyone around the globe can enjoy due to low-price and OE-like quality.
Why MZW Clutch?
MZW clutches are in level to many best aftermarket clutch brands available. We produce aftermarket to give car owners a lasting and seamless solution for their automotive troubles. Certified under ISO 9001 / TS 16949 quality system, you are certain to source products that will not disappoint here at MZW.
- Engineered to perfectly fit specific application requirements
- Precisely made and designed using premium materials
- Longer life expectancy compare to OEM parts
- Excellent hear resistant capability
- Resilient to rust and corrosion promoting longevity like no other
- Tested for a noise vibration-free operation.
We guarantee you every MZW Clutch has passed a series of strict tests:
MZW Made Clutch
We manufacturer clutch to provide a perfect fitment to every vehicle makes on the road. Using the latest technology, tools, and designing, the MZW clutch incorporates features and functionality of units that pars to OEM clutch disc manufacturers on the global market.
MZW uses only heavy-duty composites in creating automotive solutions such as high-quality clutch
Competitive Price Range
Our clutch replacements are made available at an affordable price making it your ideal alternative aside from original equipment from your usual clutch suppliers.
The company has a large variety of clutches you can enjoy. We can cater to large product orders and can do clutch wholesale with much lower prices to many countries.
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About MZW Motor
MZW is a pioneering company that utilizes up-to-date product processes including die-casting technology, accurate CNC machining, and the latest plastic molding technique in the automotive parts industry.
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MZW Clutch Guide
What is a Clutch in a Car?The automotive clutch is the name given to the mechanical component that allows the engine to connect and disconnect with the gear box. In other words, it forms the link between the engine and transmission. The clutch on a car transmission system is found between the back of the engine and attached to the flywheel. The clutch is more prominent in manual transmission vehicles as an independent and replaceable part. In these vehicles, there is also the clutch pedal, which a driver uses to operate the clutch. The pedal is the third most on the drivers left. You depress it when starting a vehicle, changing gears, and sometimes when stopping. Clutches come in many different types based on different criteria. These include according to the control method, engagement, and the way torque is transferred. Most vehicles use the friction clutch, which is an assembly consisting of friction disc to provide the engagement surface. A friction clutch can be single, double, or multi-disc. Single-disc clutches are the most common, and normally used in light vehicles. Double-disc clutches are commonly used in heavy duty automobiles. Multi-disc clutches are found in automatic transmission and heavy automobiles.
The Clutch Release MechanismThe clutch remains engaged and driving the transmission until disconnect it from the engine. Different mechanisms are used to for that. The three main clutch systems to engage and disengage the transmission and engine include the following
Clutch Components and their FunctionsThe automotive clutch system consists of the clutch pedal, linkage, hydraulic system (or cable, clutch release mechanism, and the clutch assembly. The clutch itself contains several parts. These depend on the type of the device and can be different from one clutch to another. Here, we will look at the friction and single-plate type. We will also concentrate on the main components, which include the following.
Clutch DiscThis is the round metal disc that also contains friction materials on both sides. The friction material can be organic or inorganic, with ceramic disc material being one of the most popular. The friction lining is riveted to the disc and grooved to enhance cooling and ensure clean operation. The disc itself contains a splined hub that meshes with the transmission shaft. The clutch disc function is to produce the friction that allows it to rotate with the flywheel. It’s also equipped with torsion springs/damping springs. These serve to absorb the vibrations that occur during engagement to provide a smooth clutch operation. There are also waved springs on the disc to provide a cushioning effect when the disc is pushed against the flywheel.
Pressure Plate and CoverThe pressure plate comes in the form of a spring-loaded assembly comprising a heavy cast iron ring and stamped steel cover plate. This part bolts to the flywheel and applies pressure to the clutch disc. The plate is either pressing against the friction disc or not at any one time. Its action is dependent on the diaphragm spring. When the spring is not under pressure, the plate keeps the friction disc firmly pressed against the flywheel. When you depress the clutch pedal, the pressure transmits to the diaphragm spring and causes it to releases the pressure exerted by the plate. This action is what causes the engine to engage and disengage.
Diaphragm SpringThe diaphragm spring is a round steel disc that is segmented toward the center. It’s also a dished design. This construction gives it the spring action and allows it to perform its function. Inside the clutch assembly, the diaphragm spring mounts with its outer rim attached to the pressure plate. The spring serves to free the transmission from the engine, which happens when the driver presses the clutch pedal. The segmented center of the spring, when pushed, causes outer rim to move away from the friction disc. This releases the pressure plate from the disc, resulting in the disc losing contact with the flywheel.
Clutch Release BearingAlso called clutch throw-out bearing, this part comes in the form of a ball bearing with a collar installed. The assembly is lubed to reduce friction and sealed to prevent loss of lubricant and contamination. The bearing function is to reduce the friction between the pressure plate and clutch fork. By sliding along the transmission shaft, the bearing helps to push or pull the diaphragm spring. This brings about clutch engagement and disengagement.
Clutch ForkThe clutch fork is a pivoted component that acts as the link between the clutch linkage and clutch assembly. It helps to transmit pedal pressure to the clutch and connects to the clutch release bearing. The fork is also known as release or clutch arm. To keep away contaminants from reaching the clutch, it’s usually fitted with a rubber boot.
Clutch HousingThe housing is the outer cover that encloses the clutch assembly. It can be different materials, from cast iron and aluminum to magnesium. On the side, an opening is provided for the clutch fork, while a lower cover comes out to allow access to the ring gear. The clutch housing helps to keep debris, water, and other things out of the clutch. It’s also called a bell housing.
Clutch FunctionIn a manual transmission car, the driver has to vary the speed of the wheel based on road conditions or engine load. This is achieved by changing the gears in the transmission. But changing the gears is no easy task. You would need to stop the engine first which is not practical. So manual transmission vehicles are equipped with the clutch. The clutch allows the engine and transmission to engage and disengage smoothly, without jerking the vehicle or destroying the gear box. This action accounts for many driving actions. First, it allows a driver to change gear even when the engine is running. Second, the clutch mechanism let’s a driver reconnect the engine to the transmission gradually to minimize judder. It also enables a driver to stop a vehicle without having to stop the engine first. Here is a summary of the clutch uses.
- To transfer torque to the wheels by connecting the engine to the transmission
- To prevent judder by absorbing engine vibrations and those of the drivetrain
- To provide a smooth and gradual engagement and disengagement between transmission and engine
- To allow the starting of a vehicle from rest
- To enable the stopping of a vehicle with the engine still running
Clutch Operation: How Does a Clutch Work?A clutch may look complicated and composed of many different parts. Although it is, the working principle it employs is simple enough to understand. The moving parts are also fewer than you may have thought. Here is a step by step guide on how a clutch works.
- As we have seen, the clutch assembly consists of three main parts; the friction disc, pressure plate, diaphragm spring, and cover plate. The clutch disc attaches to the flywheel. It’s also connected to transmission’s input shaft.
- Under normal conditions, the disc presses against and rotates with the flywheel. The pressure plate exerts pressure on the disc to keep it firmly fixed to the flywheel, while friction force helps it to spin with the flywheel.
- When you press on the clutch pedal, the motion transfers through release system to the clutch assembly where it meets a part called throw-out bearing. The clutch throw-out bearing attaches to the center of the diaphragm spring. When pressed, it pushes the spring.
- The diaphragm spring, in turn, deforms to cause the outer part to move outward or in the opposing direction. This causes the pressure plate to release the friction disc. The friction disc releases the flywheel, freeing the transmission from the engine.
- When the engine and transmission disengage, you are able to change gears safely. After changing gear, releasing the clutch pedal starts an operation opposite to that of disengagement.
- The throw-out bearing returns to its position, and the diaphragm spring relaxes. The pressure plate returns to its position, also, firmly attaching the clutch disc the flywheel and returning power to the transmission.
Common Clutch ProblemsThe clutch on a car, being a mechanical part, is prone to failure just like any other component with many moving parts and non-moving. Clutches mainly develop faults from abuse caused by driving habits. Stop and go driving is one of the main culprits, while towing heavy loads and “riding the clutch” also contribute significantly. Problems can happen in the clutch assembly, clutch hydraulics, mechanical linkage parts, or the cable system. The main clutch faults include the following.
Clutch SlipSlipping happens when the clutch parts cannot hold the friction disc firmly against the flywheel. In other words, you have the clutch not engaging fully. This causes it to slip even when the pedal is not pressed. You may notice that the engine picks up speed rapidly while transmission lags behind. Slipping is caused by a number of factors. It could be wear of the clutch system components such as linkage or excessive wear of the friction lining (clutch disc). Another possible cause is binding parts due to rust or corrosion. Friction disc contamination can also reduce friction and cause slipping. That happens when oil or grease settles on the disc. Wear can be corrected by adjusting the clutch linkage or parts. If the problem is binding, a close examination will reveal faulty sections of the system. Grease and oil on the clutch disc can simply be cleaned off. Locate, also, the source of contamination and fix it.
Clutch DragClutch drag means the clutch is not disengaging completely when you depress the clutch pedal all the way to the floor. The clutch continues to drive the transmission, albeit weakly. One of the reasons for the problem is excessive travel of the clutch pedal. You could also be having warped clutch parts such as the friction disc or pressure plate. Clutch drag causes the friction plate took wear too quickly, among other issues. Always correct it by carrying out repair, especially if the linkage is having adjustment problems. Other than that, you may also need to clean the friction disc to remove grease and oil contamination.
Clutch NoiseThe clutch becomes noisy different reasons. A clutch chatter, for example, results from glazed friction surfaces, oil on grease on the friction disc, or wear and warping. Squeals are characteristic of clutch release bearing noise or bad pressure plate, among others. Clutch rattle is a problem that can be traced to a failing throw-out bearing, worn disc hub, and bad release fork. Clutch noise indicates many different problems from wear, warping, to contamination and burned friction surfaces. The clutch assembly and system should be examined and the faulty part fixed.
Clutch FAQsQ1. What is clutch adjustment? A. It refers to the adjustments made to clutch systems of older vehicles that use cables. Clutch cables slacken over time and need routine checking and correcting, usually after every 6 000 miles or so. For correct working, the linkage (from the pedal to the release fork), must have the right amount of play. This is usually indicated by the manufacturer. If the play is exceeded or restricted, problems such as drag or slipping and burnt friction disc surface may follow. Q2. What is clutch master cylinder? A. The clutch master cylinder is the reservoir that contains the hydraulic fluid and pistons of a hydraulic clutch release mechanism. It looks pretty much like the brake master cylinder, with a reservoir to store hydraulic oil. The clutch master cylinder ensures you use minimal effort to operate the clutch by multiplying the pedal pressure. Most problems with the hydraulic mechanism can be traced to this part. Q3. Does holding the clutch pedal down while driving cause damage? A. It does. Holding the pedal down unnecessarily causes unnecessary clutch wear and tear. A worn out clutch will start to show symptoms such as slipping and noise, and will need replacing sooner than you expected. While the habit may seem convenient to stop your car from rolling downhill, it will cost you early clutch repair or replacement. Q4. How long is the clutch lifespan? A. The clutch lifespan depends on many factors such as driving habits and conditions, vehicle load, your mastery of clutch control techniques, and maintenance practices. Street driving can take a toll on the clutch or carrying heavy loads. If you are fond of riding the clutch, that can also shorten the clutch lifespan. Some motorists use the clutch for up to 50 000 miles before it develops problems, while others cross the 100 000 mark. To prolong the lifetime of the clutch, it’s essential to avoid driving habits that strain it. These include clutch braking, starting uphill on the clutch, drastic take off, and keeping the foot on the clutch pedal for prolonged periods. Routinely checking the clutch cable or hydraulic system and linkage also helps to ensure a longer lifespan. Q5. What are the symptoms of clutch failure? A. When you have a bad clutch, you may notice one or several of the following signs and symptoms.
- Unusual pedal or clutch noise. The noise could be clutch grinding sounds when shifting gears or squealing sounds when pressing the pedal. A grinding noise often results from the clutch not releasing or what’s called drag. Squealing signals throughout bearing problems (dried lubricant).
- Pedal pulsations. Clutch pedal pulsations are a sign of wobbly part of the clutch due to warping or any other damage.
- Clutch pedal unusual feel. It may feel hard to push or feel spongy. This results from a faulty linkage or hydraulic system. The pedal may also remain depressed in what drivers call clutch sticking to the floor
- Difficulty shifting gears. It shows a problem with the clutch linkage whether mechanical or hydraulic. It’s either broken down or excessively worn
- Spongy clutch pedal. This indicates a problem is the hydraulic system if the actuation linkage is hydraulic. It could be a leak or air in the system
- Car starting slowly but the engine accelerates rapidly. If the two are not matching, the clutch is slipping, either due to contamination or worn parts
ConclusionThe automotive clutch is crucial to important events such as starting a vehicle, changing gears, and stopping. Its smooth operation is, therefore, essential to ensure your driving comfort. Because clutch and transmission operations are related, the device also ensures safe driving. The information in this guide will improve on what you already know about the clutch in automobile applications. That, in turn, should help you to take better care of your car’s clutch system.
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