Cars Blog; April, 2007 Archive, Page 2

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Bell Housings

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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Driveshafts

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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Differentials

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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Dashboards

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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Clutches

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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Car Doors

By Car Parts Sales at 04/25/07 13:17

There are several different types of car doors besides the standard door. Briefly explained here are a few types:

Gull-Wing Doors: The term gull-wing door is an automotive industry term describing automobile doors which are hinged at the roof. They are so named because, when opened, the doors evoke the image of a seagull's wings
Butterfly Doors: Butterfly doors, also called vertical doors or dihedral doors, are a type of door often seen on high performance automobiles. They are similar to scissor doors, but while scissor doors merely tilt forward and up, butterfly doors also rotate as they move forward
Scissor doors: also called Jackknife doors or Lambo doors, are automobile doors that rotate up and forward on a hinge near the front of the door
A suicide door is a car door that is hinged on the trailing edge; the edge closer to the rear of the vehicle. The term reflects a perceived increased danger of the door falling open if it becomes unlatched while the car is moving

Tags: auto parts • car doors •
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Catalytic Converters

By Car Parts Sales at 04/25/07 11:50

First widely introduced on series-production automobiles in the US market for the 1975 model year, to comply with tightening EPA regulations on auto exhaust, catalytic converters are still most commonly used in motor vehicle exhaust systems
Three-way catalytic converters: Since 1981 three-way catalytic converters have been at the heart of vehicle emission control systems in North American roadgoing vehicles, and have been used on "Large Spark Ignition" engines since 2001 in California and from 2004 in the 49 states
Two-way catalytic converters: This type of catalytic converter is widely used on diesel engines to reduce hydrocarbon and carbon monoxide emissions. They also were used on spark ignition (gasoline) engines in USA market automobiles up until 1981, when they were replaced by three-way converters due to regulatory changes requiring reductions on NOx emissions
Catalyst poisoning and deactivation: A variety of conditions may cause the catalyst to overheat (heat deactivation) and potentially to melt down. Some factors that can cause this are:

Lubricating oil in the exhaust system (caused by engine wear, or by damaged rings or valves)
An engine misfire or ignition failure (causing unburnt fuel to enter the exhaust)
A cracked exhaust valve (again, causing unburnt fuel in the exhaust)

Rich Burn Spark Ignition Engines: For spark ignition engines the most commonly used catalytic converter is the three-way converter, which works best used on engines equipped with closed-loop feedback fuel mixture control employing one or more oxygen (lambda) sensor
Oxygen storage in 3-Way Converters: In order to oxidize CO and HC, the catalytic converter also has the capability of storing the oxygen from the exhaust gas stream, usually when the air fuel ratio goes lean

Tags: auto parts • car catalytic converters •
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Automotive Job Teaching Technology

By Jobseeker at 04/21/07 09:17

If you love cars, enjoy helping people and can hold your own in a room filled with over zealous young car enthusiats, perhaps it is time for you to start considering an automotive job teaching technology. After all, you were known all around the tight knit neighborhood that you grew up in as the go to person for carborators, fan belts, four wheel drive towing and all things automotive. So, it is only fitting in with tradition that you would use your lifelong inclination for motion for an automotive job teaching technology. And in today's world of automotives your lifelong penchant for technology may come in more than just a little handy.
Automotive Job Teaching Technology
Many automotive technician instructors, simply do not understand, or do not care to understand, the technology that has made computers as big a part of automobile maintain and repair as oil, shocks and brakes. As these uncomfortable automotive experts head for the classroom door, the automotive training industry will be in search of those people with a nose for invention to hold automotive positions with an emphasis on technology. The more comfortable you are working with technology, the greater your chances become of landing a job as an automotive training instructor.
What You Will Be Teaching
Potential employers are not only looking for well-rounded automotive technicians, but analytical thinkers as well. That is why many automotive training students are signing up for local junior colleges-the end result is a degree in applied sciences. There are a lot of additional classes along the way.Your automotive job teaching technology may be housed within a community college, or trade or technical school, like the Lincoln Technical Institute. Automobile manfacturers and car dealerships offer two year training programs that students are eligible to enter following their completion of high school.
Like community colleges, these programs also offer an Associate's Degree at the program's conclusion. Approximately three months of these programs feature full-time class schedules. They spend much of the remainder of that time working in the field in the dealership or manfacturer's body shop.
Automobile training programs in community colleges last roughly two years. On the road toward an Associate's Degree in Automotive Technology, or something similar, students take up automotive training classes in addition to classes to satisfy the General Education requirements. Such classes include, English, Math, United States and World History courses, Communication and courses in computer science. The additional courses offered give potential automotive technicians the extra padding they will need to successfully run a business and succeed in the workplace.

Tags: auto jobs • technology •
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Batteries

By Car Parts Sales at 04/20/07 12:31

Car batteries are usually lead-acid batteries that provide a nominal 12-volt (actually 12.6 volts) potential difference by serially connecting six cells that each produce about 2 to 2.1 volts
The starting (cranking) or shallow cycle type is designed to deliver quick bursts of energy, usually to start an engine. These batteries usually have a greater plate count in order to have a larger surface area that provides high amperage for short period of time. Once the engine is started, they are continuously recharged
The deep cycle type is designed to continuously provide power for long periods of time (for example in a golf cart). They can also be used to store energy from a photovoltaic array or a small wind turbine. These batteries usually have thicker plates in order to have a greater capacity and survive a higher number of charge/discharge cycles
Tap or rain water should never be used in batteries as they both can contain high levels of minerals which will impair battery performance
When installing a new battery or recharging a battery that has been accidentally discharged completely, one of several different methods can be used to charge it. The most gentle of these is called trickle charging. Other methods include slow-charging and quick-charging, the latter being the harshest

Tags: auto parts • car batteries •
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Buzzers

By Car Parts Sales at 04/20/07 10:08

Buzzers commonly consists of a number of switches or sensors connected to a control unit that determines if and which button was pushed or a preset time has lapsed
Nowadays, it is more popular to use a ceramic-based piezoelectric sounder like a Sonalert which makes a high-pitched tone
Commonly used as a back-up warning indicator

Tags: auto parts • car buzzers •
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