automative lif rasise a 3500lb car 7ft above floor level if the hydraulic cylinder contain 8in diameter piston?

An automotive LIFOtraisese a 3500lb car 7ft above floor level if the hydraulic cylinder contain 8in diameter piston and a 4in diameter rod,determine the
A. work necessary to lift the car
B. required pressure
C. power if the lift raises the car 10 s
D. Descending speed of the lift for a 10-gpm flow rate
E. flow rate for the auto too descend in 10 s

Chosen Answer:

All these answers based on 8 inch lifting cylinder. You haven’t specified anything about the 4 inch rod so haven’t used that in these answers

a). work = force x distance
work = 3500 lb x 7 ft = 24,500 ft-lbs of work
b) 8 inch diameter piston = area of pi * r^2 = 50.26 sq inches
3500 lb / 50.26 in^2 = 69.6 psi pressure
c) power = work / time = 24,500 ft-lbs / 10s = 2450 ft-lb/ second
(one foot-lb /second = 0.738 watt so –> 2450 * .738 = 1,808 watts of power in SI system)
d) volume of a cylinder = pi * radius squared * height
one gallon = 231 cubic inches
10 gallons = 2,310 cubic inches
V =2,310 cubic inches = 3.14 * 4in ^2 * height
height = 2310 / (pi * 16) = 45.96 inches

So 10 gallons a minute will lift car or descend car 45.96 inches or 3.8 feet a minute

e) Flow rate to descend in 10 seconds instead of a minute is 6 times faster (60 sec a minute / 10 sec) = 6.
6 * 10gpm = 60 gpm
by: biire2u
on: 14th April 10


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What do you think of 4-cylinder SUV’s?

Even in times of high gas prices – you have 4-cylinder SUV’s — which don’t really preform too well (personally I think 4 cylinders belong in cars or station wagons)… I was driving my mother’s Rav-4 the other day – sure its Mechanically sound and reliable – but it preforms very BAD in windy conditions — you can’t stay in one lane… its too light and its center of gravity is too high… and its plain cramped uncomfortable to drive…

Now, the Forester – that’s a nice concept – Wagon SUV… and I hear the CRV is good…

I work at a used car dealership so I did get to test drive the forester – I thought it was pretty spiffy… CRV was OK… I liked the interior but it bore much resemblance to the Rav-4 in terms of handling…

Chosen Answer:

Obviously a 4-cylinder SUV does not offer the presence or power of a V8, but the obvious trade-off is better fuel efficiency and a more environmentally friendly vehicle. But really, having a 4-cylinder is in no way a disadvantage. The RAV-4’s highway performance is not affected by its engine, rather it’s other aspects of engineering. Of the three you listed, I and several automotive magazines recommend the Forester. It’s really come a long way since its inception. Of course, the CRV and RAV-4 aren’t bad options either. One 4-cylinder SUV that is often overlooked is the Mazda CX-7. If you don’t like the SUV driving position, it sits lower to the ground and handles much more like a car. However, I’d advise against the Chevrolet Equinox, Ford Escape, Mitsubishi Outlander, and anything from Dodge, Chrysler, or Jeep. I know it sounds biased against domestic manufacturers, but compact, car-based SUVs are not an American forte. These vehicles just lack the quality and driving dynamics of the foreign automobiles. Two nice uplevel choices are the Acura RDX and the brand new Volkswagen Tiguan.
by: Matt
on: 20th September 08

i want to start a business and i need to know if there are any grants i can apply for to help with the cost?

im starting an automotive machine shop, repairing cylinder heads and engine blocks i have a small shop with some of the necessary equipment but the cost is hindering me from following through with my plans. i have about 35 years experience and i know very well what im doing. i need about ,000 to help me take off, and i would prefer not to take out a loan. can you help me?

Chosen Answer:

Being a small business owner, you need to pay extra attention to management of financial resources. Since growth of your business somehow depends on its financial position, you should always be cautious about cash flaw within or outside your business. It is quite true that lack of finance can become a big problem in the way of the success of your small business.

Since market is crowded with various business loan schemes, every small business owner can manage to get the desired amount without any problem. Therefore if you own a new and small business organization and financial shortfall is bothering you, then these loans can prove to be the best help for you.
by: Jenna
on: 12th April 13

Automotive Knowledge: Material Structure Introduced For High Spark Plugs in Temperature

Gasoline engines are Spark Plug , A cylinder one, for each individual cylinder of high-speed gasoline engine fitted with two spark plugs, spark plug ignition coil role is to generate the high voltage (10,000 volts or more) into the engine cylinder, the spark plug electrode gap between the spark ignition mixture. Spark plugs work environment is extremely harsh to a regular four-stroke gasoline engine spark plugs, for example, when the temperature in the intake stroke is only 60 , pressure 90KPa; combustion in the ignition, the temperature will rise instantly to 3000 , the pressure to 4000KPa; This rapid thermal quench alternating high frequency, not the usual material can handle it, but also ensure the insulation, so the spark plug of material requirements also very harsh. Related Reading: How to make summer a comprehensive maintenance car Easy to cause the engine temperature is too high in summer injury

Spark plug is very small, one can put away a few pockets, but it is not a simple structure. Insulator and metal shell which has two components: the metal shell with a screw thread for screw into the cylinder; in the shell that has the insulator, it was a center electrode inside through the center electrode top of a wire nut, connect from the Distributors over the power lines; the end under the shell welding grounding electrode, the center electrode and ground electrode gap between 0.6-1.0 mm, high voltage through the gap into the earth would burst out spark ignition mixture.

Key part of spark plug insulators, if the insulation does not work, high voltage will “Chao Xiaolu” in lieu of poles into the ground, causing no sparks. Spark plug insulators must have the good mechanical properties and resistance to high voltage, high-temperature impact resistance, chemical corrosion ability, more than ordinary spark plugs use to made of alumina-based ceramics. Spark plug size is uniform throughout the world, any car can be common, but there are different types of gasoline engines, the spark plug will have two basic sub-type, cold type and hot type. Type and heat and cold are relative terms, it reflects the thermal characteristics of spark plug performance. Spark plugs should be the right temperature to work well without coke to work properly.

Proven spark plug insulator to maintain the temperature at 500-600 , the fall of the oil droplets insulator will not immediately burn off the coke formed, higher than the temperature of early burning, lower than the temperature coke. The temperature at different engine will be different, designers made use of insulator length skirt to resolve this conflict. Some short skirt heated area small, fast heat dissipation, so skirt the temperature lower, is called cold type spark plug for high-speed high-power engine with high compression ratio; some slender skirt heated area, heat slowly, so skirt temperature is higher, known as thermal-type spark plug for the low compression ratio in the low-speed low-power engine. What spark plug in his car, according to the manufacturer’s requirements models to choose from, not a spark plug are applicable. This stuff seems simple

spark plugs, doing it is not easy, it required materials and manufacturing process is very high, due to very poor working conditions, the breakdown spark plug insulators, electrode coke failure often occurs, it is ” wearing parts “, many drivers Toolbox Standing spark plug in order to change at any time. Of course, as technology Developing , Spark plug also increases the durability of the electrode material to replace the traditional use of platinum alloys of copper – nickel alloy, extended life spark plugs, Modern General use car spark plugs up to 150,000 km mileage around.


Buying Tips for Hydraulic Lifts in Lift

For material handling and carrying heavy loads, hydraulic lifts are widely in use. The basic mechanism behind a hydraulic lift working is the use of hydraulic fluid and cylinder to raise and lower objects. Infact, the whole mechanism of the working of various heavy machines is dependent on the use of these lifts and they are considered much better than the usual traction lifts.

The market is offering a wide range of hydraulic lifts depending on the application areas. There are personal lifts or elevators which are seen in tall buildings, apartments and commercial areas. There are table lifts, dock lifts and pallet and fork lifts, used in construction sites, manufacturing units, industries and factories. Today, hydraulic lift is the base of many machines that are used for lifting and carrying of heavy loads. It has safe control systems and hence can easy be operated. The best part is that it consumes less power.

As already mentioned, there are different hydraulic lifts, made with different specifications, which in turn depend on the application. For buying hydraulic lifts, certain factors or specifications need to be considered which we are discussing below:

Total Floors
It is necessary to know the number of floors the lift is made of as most lifts are made of 1 to 3 floors. To meet the requirements of the buyers, the manufacturers must produce lifts with different floors .

Load or Weight Capacity
It is also necessary to know the weight capacity of the load that the lift can carry.

This is measured in  kilograms or pounds, the smaller ones in kg and the heavier ones in pounds.  So you need to find different suppliers to find the lifts with different load capacities.

Lift Speed
To carry the objects up and down, the speed of the hydraulic lift must also be known. This is expressed in meter per minute or inch per minute. Learn about the varied speed limits needed for different applications and accordingly you make choice of the lift that you want.

Requirement of Maximum Height
Another factor to consider is the maximum height that can be achieved.  This is required because each lift depending on its design has its own upper limit or maximum height to which it can carry the load. When load is required to be lifted to a specific height, the buyer should buy the lift of that height or slightly more than that.

Size of the Platform
The platform or the rack on which the objects are kept are not of equal size.  The size of the platform depends on the load capacity. The buyer should consider the length and width of the lift platform.

Power Required
The buyers should also know the power required to run the hydraulic lifts and whether it should be connected to single phase or three phase power input.

Lastly, hydraulic lifts should be purchased considering their application. For example, the lift used in a construction site is different from the lift used in a car repair center. Different specifications are associated with different applications.

For more information and wholesale purchase of hydraulic lifts and other hydraulic machines, check out Hydraulic Machines and Tools.



Hydraulic Motor in Motor

A hydraulic motor is part of a hydraulic drive system that uses pressurized fluid to move a cylinder and make a machine function. An electric motor, combustion engine, or some other type of generator, pressurizes hydraulic fluid through a series of valves and pipes to control the system. This fluid physically pushes either a hydraulic cylinder or motor and drives the machinery. The motor itself is the actuator that converts the fluid’s pressure into torque and rotation.

Gears can be added to a hydraulic motor to change the level of torque administered to a specific operation. For example, a military vehicle that needs to travel over many different types of land will have different gears to control the amount of pressure used to push the hydraulic motor. Pavement will need less hydraulic power to move the vehicle, while dirt or mud may need more.

Different types of plungers or pistons can be used in the motor. The most common type is an axial plunger. The pistons for the motor are designed to be parallel to allow for continuously adjustable sweeps to make the hydraulic motor operate more efficiently. Speed of the hydraulic motor ranges from 1200 to 1800 rpm. In order to increase the speed of a hydraulic motor, radial pistons can be used. These pistons make short sweeps in the engine, allowing for increased speed. However, the maximum level of torque decreases as an effect of these short sweeps.

One of the disadvantages of a hydraulic motor is that it allows for leakage through a connection in the drive system.

This helps prevent the engine from locking up as it turns. This means that the motor needs some sort of braking mechanism to ensure that the system remains properly secure. It also requires routine monitoring of gauges that display the fluid levels. A safe operating system is important for the continued use of the machine.

First developed during the 1700s, hydraulic motors are notable for the fact that they can produce more power than other motors of the same size. They can take on larger loads than traditional electric motors and are most commonly used in aircraft, construction vehicles, and automobiles. In addition, a large volume of industrial machinery uses hydraulic motors to perform heavy lifting tasks and in situations that require strong pressurized actions such as injection moulding. These can be constructed as small components to a complex mechanism or one very large hydraulic motor performing a single task.


Cylinder Heads – Technology Advances In Automotive Engines in Head

Contemporary large functionality engines necessitate cylinder heads that offer precise operation to keep up the essential operating speeds. The heads cylinder configuration has turn out to be a technological marvel on modern day engines. This is actually a departure in the earliest flat head engines exactly where the head was straightforward piece of flat steel that was bolted on top rated of your cast iron prevent. The earliest heads simply just sealed inside internal transferring elements and helped discover when repairs and routine company had been required. Flat mind engines have been basic and straightforward to function on but a smaller amount efficient to function.

Advances in performance led to such variations as the overhead valve cylinder heads along with the overhead cam heads. They’re however well-known currently and could be identified on nearly every engine. An overhead valve head and cylinder configuration keeps the valves in the mind. The valves are accountable for permitting the fuel mixture to achieve the cylinders and the exhaust gases to be evacuated through the cylinders. The valves will seal shut through operation to let combustion in every cylinder to acquire site. Overhead cam cylinder heads consist of the cam shaft mechanism that operates the valves. With overhead cams you will discover significant components including connecting rods needed. This creates a additional successful engine. Overhead cam engines also let for contemporary advances including cylinder deactivation and shutdown on avoid engines that conserve fuel by only using the motor in the event the automobile is in fact shifting.

As know-how has highly developed the head cylinder configuration continues to be modified several instances. Cylinder heads now include cams that have various profiles and design and style. The heads will handle the operation from the engine through laptop programs that might deactivate cylinders as soon as operating speeds have been reached. The heads cylinder deactivation systems will shut away from two or much more cylinders permitting the motor to function additional efficiently. When higher ability is essential the cyl heads will activate the cylinders by operating the valves that had been disabled. This will likely allow in fuel and discharge exhaust and dissipate warmth.

Since the head functions being a cover to the motor block the seal in between head cylinder has to get restricted and full to do away with leaking. For the reason that head and cylinder have oil and normal water operating through them the seal have to be impenetrable also. Any mixing of coolant and drinking water will probably be extremely damaging for the internal components of an engine. Internal combustion engines have can come a long way considering that they ended up being very first invented inside the late 1800s. Contemporary cylinder heads let motor technological innovation to be much far more sophisticated than was previously believed feasible.


Automotive Marketing: Boardwalk Audi

German luxury car maker Audi AG is releasing their 2012 version of the Audi TT in the U.S, this year. The new Audi TT RS will prove to be a faster version of its European counterpart with an extra 20 HP from its turbo charged 2.5 liter 5 cylinder engine. The car can go from 0 to 60 mph in under 5 seconds. Boardwalk Auto Group is one of the largest luxury car dealer groups in Texas and are staffed with the most knowledgeable sales and technical professionals in the business to give you the information you need on anything Audi. They have the latest and most popular Audi car models in their Boardwalk Audi showroom. Brian Ongaro, the new Boardwalk Auto Group Vice President for Sales and Marketing leads the team of Boardwalk marketing professionals in bringing you the latest luxury cars in the market.  

Audi AG has had a long and illustrious career in the luxury and race car world. The very first Audi, the Audi Type A Sport Phaeton, was built in 1910 by August Horch & Co.

The story of how Audi got its name is an interesting one. August Horch, after striking up on his own, was barred by his former company to use his name in any of his automobiles. One night he invited a few of his friends to think of a name for his new car company. As they discussed, his son who was studying Latin in the room and listening to the conversation, interrupted his father and his friends to suggest the name ‘Audi’. He explained that since ‘Horch’ in German means ‘Hark’ or ‘to hear’ it would make sense to use the Latin interpretation ‘Audi’ which means ‘to listen’. They considered it a brilliant idea and adopted the name instantly.

August Horch continued to run his company until the 1920s when he decided to sell it to Jorgen Rasmussen, owner of the German car company Dampf-Kraft-Wagen (DKW).

A decade after that, in 1932 Audi became part of the Auto Union. A group of four German car companies composed of Horch, DKW, Wanderer, and of course Audi. This is where the four rings, which eventually became the Audi badge, got developed to symbolize the four Auto Union companies. The first ring represents Audi, the second DKW, the third Horch, and the fourth Wanderer. Auto Union, however, used the four rings only on their race car models not their road car models. This is why Audi as a car brand remained unknown to car buyers until the 1970s. This is when Volkswagen bought 99 percent of the company and introduced the Audi brand to the United States with the Audi 100, the Audi 50, and the Audi 80.

A decade after that the very first Audi performance car and rally racing car was released to the market, the Audi Quattro. With its permanent all wheel drive it went on to win many rally races. Its success proved the viability of all-wheel drive race cars and established Audi as a dominant race car brand. The Audi Quattro’s performance in rally races elevated the Audi brand into a leader in automotive technology. After earning the admiration of the car industry with a succession of popular car designs Audi soon aimed to develop cars that can compete with fellow German luxury car brands Mercedes-Benz and BMW. This ambition bore the Audi V8, a prettier version of the Audi 100 fitted with a new engine. It was during this time Audi hit a rough patch and encountered consumer complaints about unintended acceleration on their cars. They have since fixed these problems and acquired better technology in the construction and development of their car models. They lead in the development of car body shells with the 100 percent galvanized car which prevents car corrosion. The full body zinc coating on Audi cars prevents rust and increases the durability of the cars by more than 12 years. Another car technology contributed by Audi is the use of aluminum space frame which was introduced by the Audi A8 which makes it the lightest all-wheel drive car in the luxury segment.  

If you have had an Audi in your wish list for some time now then hurry and go to the Boardwalk Audi dealership to order and know more about the new Audi TT RS and other Audi car models you may want. Brian Ongaro, vice president for sales and marketing at Boardwalk Auto Group and the team at Boardwalk Audi are waiting to give you all the information you need to know everything you want to know about any Audi car model.
By: Jared Ingram
Posted: 2012/02/21

Why are the automotive companies struggling so ineffectively to get better fuel economy ?

60-odd years ago I owned a 1929 Morris Minor sedan that regularly achieved over 40mpg on the larger Imperial gallon … It had an 848cc capacity, sohc, 4 cylinder engine with long stroke, small bore and a rather inefficient-SU pump-type carburettor. Top speed was well above todays’ Freeway limits. Seems to me we need to re-invent the wheel ?

Chosen Answer:

You’re spot on!
However some of the stuff that undermines things on efficiency go behind the scenes.
Miles per gallon for cars in the mid 1990’s are same as they are now. Yet there have been advances. How?
1. Each year there’s a different hurdle for safety requirements. Many of the requirements add weight. The weight must be stripped off some where or the car must carry more weight.
2. Emissions requirements – must burn cleaner, more stuff has to be added. Weight is added and removed or fuel suffers.
3. Consumers demand (AC, Sound Systems, Beverage holders…on and on) – more drain on power, add weight, sacrifice efficiency.
4. Fuel – There are more additives (back when you and I were putting about, that leaded stuff was rocket fuel compared to the stuff now…Mick….did we even need compression to get an ignition?). Additives sometimes degrade octane. Fuel is less efficient than it was.
For each advancement that is made, and admittedly they seem like baby steps, there’s a regulatory reason or market reason that all but erased the benefit.
by: The Taxpayer
on: 28th July 10