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auto parts Cars Blog; April, 2007 Archive, Page 1; Cars Blog Top Used Car Makes
| -- ../../local/bncars/auto_parts/index-April-2007-2.html • Page 1 • Page 2 • By Car Parts Sales at 04/30/07 10:06
 - With an internal combustion engine exhaust pipes are usually part of an exhaust system which conveys burnt gases from the engine and includes one or more exhaust pipes
- Design criteria: The gases from car engines are very hot; the pipe must be heat-resistant, and it must not pass through or near anything which can burn or can be damaged by heat
- Terminology:
- Manifold or header: Manifolds are often made of cast iron in stock production cars, and may have material saving design features such as to use the least metal, to occupy the least space necessary, or have the lowest production cost
- Headers are usually circular steel tubing with bends and folds calculated to make the paths from each cylinder's exhaust port to the common outlet all equal length
- They are joined at narrow angles to encourage pressure waves to flow through the outlet, and not back towards other cylinders
- Most car performance enthusiasts buy aftermarket headers made by companies solely focused on producing reliable, cost effective well designed headers specifically for their car
- Turbo-back: Turbo-back (or turbo back) is to the part of the exhaust system from the outlet of a turbocharger to the final vent to open air
- Turbo-back systems are generally produced as aftermarket performance systems for cars with turbochargers
Tags: auto parts • car tail pipes •
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By Car Parts Sales at 04/30/07 09:43
 - Bell housingsare bolted to the engine block and contain the flywheel, the torque converter or clutch of the transmission
- The starter motor is usually mounted here engaging with a ring gear on the flywheel
- On the opposite end to the engine is usually bolted the gearbox
Tags: auto parts • car bell housings •
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By Car Parts Sales at 04/27/07 10:23
 - Most engines or motors deliver power as torque through rotary motion: this is extracted from the linear motion of pistons in a reciprocating engine; water driving a water wheel; or forced gas or water in a turbine. From the point of delivery, the components of power transmission form the drive train.
- Early automobiles often used chain drive or belt drive mechanisms rather than a driveshaft. Some even used electrical generators and motors to transmit power to the wheels
- The automotive industry also uses driveshafts at testing plants where at an engine test stand a drive shaft is used to transfer a certain speed / torque from the combustion engine to a dynamometer
Tags: auto parts • car driveshafts •
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By Car Parts Sales at 04/27/07 10:17
 - In an automobile and other four-wheeled vehicles, differentials are devices, usually consisting of gears, which allow each of the driving wheels to rotate at different speeds, while supplying equal torque to each of them
- Purpose: When cornering especially, car's wheel rotate at different speeds. The differential is designed to drive a pair of wheels with equal force, while allowing them to rotate at different speeds
- Here is a milestones in the history of this device: 1027, 1107 AD - Documented Chinese reproductions of the chariot, postulated to contain a differential
- A pinion gear at the end of the propeller shaft is encased within the differential itself, and it engages with the large ring gear or crownwheel in Britain, shown in the diagrams
- The torque on each wheel is a result of the engine and transmission applying torsion, a twisting force, against the resistance of the traction at that wheel. The engine and transmission can usually supply as much torque as necessary, so the limiting factor is usually the traction under each wheel
- The locking differential, which employs a mechanism for allowing the planetary gears to be locked relative to each other, causing both wheels to turn at the same speed regardless of which has more traction
- Fully integrated active differentials are used on the 2005 MR Ferrari F430 and on rear wheels in the Acura RL
Tags: auto parts • car differentials •
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By Car Parts Sales at 04/26/07 10:27
 - Originally, a dashboard was the upturned front of a horse-drawn chariot or wagon, which protected the driver from mud and debris thrown up by the horse's hooves
- A dash is a control panel located under the windscreen of an automobile. It contains indicators, dials, controls and displays to assist operation of the vehicle
- Custom-built coupe race cars often simply have a piece of sheet metal that forms the dash. Whenever a new gauge needs to be added, a hole for the gauge is drilled in the appropriate location.
- Open wheel race cars have no space for a dash, so the instrument cluster is integrated into the center of the steering wheel.
- Items located on the dashboard first included the steering wheel and the instrument cluster, which by now contains gauges such as a speedometer, tachometer, odometer, and fuel gauge. Later came heating controls, lighting controls, and audio controls
- Instrument fashion: In the 1940s through the 1960s, American car manufacturers and their imitators designed unusually shaped instruments on a dashboard laden with chrome and transparent plastic. They could be less readable but were often thought to be more stylish. Sunlight could cause a bright glare on the chrome, particularly for a convertible
Tags: auto parts • car dashboards •
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By Car Parts Sales at 04/26/07 10:12
 - Vehicle clutches: There are many different vehicle clutch designs. Most are based on one or more friction discs, pressed tightly together or against a flywheel using springs. The friction material is like the material used in brake shoes and pads and contained asbestos in the past
- Clutches found in heavy duty applications such as trucks and competition cars use ceramic clutches that have a greatly increased friction coefficient. These have a grabby action and are unsuitable for road cars.
- While engaging the clutch, the engine speed may need to be increased from idle, using the manual throttle so that the engine does not stall
- Wet and dry clutches: A 'dry clutch', as the name implies, is not bathed in fluid that robs it of some energy. A 'wet clutch' is immersed in a cooling lubricating fluid, which also keeps the surfaces clean and gives smoother performance and longer life
- Clutch operation in automobiles: A manual transmission contains cogs for selecting gears. These cogs have matching teeth, called dog teeth, which means that the rotation speeds of the two parts have to match for engagement. This is achieved by a secondary clutch called a synchronizer, a device that uses frictional contact to bring the two parts to the same speed. A locking mechanism called a blocker ring prevents engagement of the teeth (full movement of the shift lever into gear) until the speeds are synchronized
- Cone Clutches: A cone clutch serves the same purpose as a disk or plate clutch. Instead of mating two spinning disks, the cone clutch uses two conical surfaces to transmit friction and torque. The cone clutch transfers a higher torque than plate or disk clutches of the same size due to the wedging action and increased surface area
Tags: auto parts • car clutches •
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