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which 1 of the maximum representative of conveyance representation to be more specific? Some people mention, torque, the so-called for

torque from the elementary school the concept of the the acceleration of gravity 9.8m/sec2, the unit can be converted to people familiar with the kilogram - meter (kg-m). Imperial units, compared with pounds - (lb-ft), in the United States car classify is more common, converted to metric, at a time the lb-ft of numbers can be divided by 7.22.

vehicle drive force is calculated by:

the torque from the engine can be divided by the radius of the cycle horsepower - torque output curve can be found in every speed there is a relating torque worth, how to convert these values ​​to the substantial drive vehicle power? The question is easy, For instance, almost a 1.6-liter engine can play the maximum torque of 15.0kg-m at this time if instantly connected to the 185 / 60R14 tire size, radius of about 41 cm, is played by the wheels of the driving force for the 15 / 0.41 = 36.6 kg of force (in fact, is not the kilograms of force units, but the weight of the unit ought be multiplied by the force of gravity 9.8m/sec2 is the standard unit

36 kg of how the power of one tonne of weight to enhance it? Hundreds of thousands of rpm and engine speed can not just convert more tire speed, otherwise the car does not fly up? Fortunately, the smart invention of the Since the circuit of the gear ratio is the radius ratio, so the gear transmission of power from small Tai gear, corner the speed abatement ratio and torque amplification element, are exactly equal to the ratio of two gear teeth, this ratio is phoned the .

example, the pinion drive gear, assuming that a small number of teeth is 15 teeth, gear teeth 45 teeth.
When wing rotation speed to 3000rpm, while torque of 20kg-m, the transmission speed of Tai gear will decrease the 1 / 3 into 1000rpm; but prefer zoom in 3 times the torque, a 60kg-m . This is the engine torque via a gearbox to decrease speed and torque amplification of the elementary principles.

in the car, the engine output to the tires at present a aggregate of double the torque amplification, the 1st time the character of transmission of bits generated and the second arising out of the last gear ratio (or the terminal transmission ratio). The absolute exaggeration is the torque transmission gear ratio and final gear ratio multiplied by a multiple. For example, the hand-like row of six generations of a U.S. Gear ratio 3.250, final gear ratio of 4.058, while the engine's maximum torque of 14.6kgm/5500rpm, so we can think the maximum torque after the first file after amplification 14.6 × 3.250 × 4.058 = 192.55kgm, than the native engine magnified 13 times. Then divided by the tire radius of about 0.41m, thrust can be obtained about 470 kg. However, these values ​​are not the actual thrust, at last, the process of mechanical transmission losses have to have abrasion and accordingly the efficiency of mechanical factors have to be taken into list.

discussed mechanical efficiency, every through a gear transmission, will have a power loss, handbook gearbox mechanical efficiency of about 95%, the auto transmission than the miserable, left about 88%, while drive shaft prevalent joint efficiency is about 98%, you multiply by to see that their actual number of left thrust. Overall, the car driven by the following formula:

torque transmission gear ratio × × gear ratio × final mechanical efficiency
driver = --------------------
tire radius (in meters)


horsepower nor> Morocco In fact, horsepower is not an> Mount Nevertheless, we must proceed to use the

power is calculated by the torque, while the calculation formula is simple: power (W) 2π × torque (Nm) × speed (rpm) / 60, to simplify calculations as: power (kW ) = torque (Nm) × speed (rpm) / 9549, a careful derivation see carton story. However, power (kW) to convert everybody how common the
English alternatively Metric?
1PS = 735W; 1hp = 746W
horsepower is not even defined the same as!


about engine horsepower, I deem numerous people would intuitively think of what DIN, SAE, EEC,tods shoes sale, JIS, and so different testing standards,tod's shoes, in the end the difference in where these standards, then learn after free ; somewhat exaggerated due to the different imperial and metric on the Imperial horsepower (hp) is defined as: a horse in one minute to 200 pounds (lb) pluck massive objects, 165 British (ft), after multiplying the equivalent 33,000 ft-lb/min; and metric horsepower (PS ) is defined, compared with a horse in a minute to pluck 75 kg object 60 meters, then multiplication is equal to 4500kg-m/min. After unit conversion, (1lb = 0.454kg; 1ft = 30.48cm) really found that 1hp = 4566kg-m/min,tods shoes, and metric 1PS = 4500kg-m different, and if the power W (1W = 1Nm/sec = 9.8 kgm / sec) to the conversion, it can get 1hp = 746W; 1PS = 735W two different results.
is too a Is UK horse more

in the end why the world's imperial and metric are, like why some cars are right hand drive, but some are left-hand drive, is all laborious to reconcile the human point of difference. If we are more familiar with several test standards, the German DIN standard and the current European Community EEC as well as Japan's JIS is the PS is metric horsepower unit, while the SAE hp using the imperial units, but in order to to dodge complicated, Articles a rate-hp unit is apparent as hp. Recently, more and more of the original data has been changed to cater the total undisputed KW engine power output as the value.

But having said that, 1PS and 1hp difference among only 1.5%, every hundred horsepower difference 1.5, the difference is not premonitory. Most of the general car's horsepower to 200 horsepower,womens moccasin shoes, only the following, defined as the difference between the two is only about 3 horsepower, so if you really absence to However, SAE, JIS, DIN, EEC assorted tests have little difference between the standards,tods online, the old answer has been argued many times, between the units can not really equate, but not very many in different circumstances, the same as it! So he is PS or control hp, almost all can be regarded as equal.

can finally make conclusions! Will obtain the horsepower and the power conversion means into power and torque conversion formula, and the torque convert to the familiar kg-m, the availability of the following results:
regal horsepower hp = torque (kg- m) × engine speed (rpm) / 727
PS = metric horsepower torque (kg-m) × engine speed (rpm) / 716

know what these formulas after use? From the For example, if the speed from 6000rpm to 8000rpm, equivalent to an increase of 33%, but because of restrictions make 8000rpm when the camshaft torque dropped by 10%, then still make the horsepower increase of 19.7%, which shows why the microprocessor nowadays modified After elevating heaving off the oil in a actual increase in horsepower.
so do not be

we calculate from distinct perspective: If the same speed, one addition of 20 horsepower, how much can increase the thrust ashore benefit of it? The highest torque point activity by 5000rpm in the circumstance, alteration the formula a little bit, can be found in the additional torque = 20hp × 727 / 5000rpm = 2.9kgm. This result namely then substituted into the formula automobile drivers, the same calculation of a document like the United States, 2.9 × 3.250 × 4.058/0.41 = 93 kg. For the one-ton body, the impact does no appear to how great; Furthermore whether a inconsistency of 5 horsepower, then the boost namely extra additional at merely 23 kg, showing a feud of 5 horsepower, and they are not many aggravate, they are skillful horsepower

determination actually high-powered performance!
in the end high-powered car to run hasty, or large torque of the car run rapid? From high-powered formula can understand the cause is The fundamental publish with the horsepower is excessive, at all times do lofty horsepower, except namely the speed torque are large regions, it is more representative of the superiority of materials technology, the piston, intake and exhaust valve material and the weight to be strengthening and lightweight to the engine speed increased.

torque and power conversion formula derived
assuming a radius of r (units of m), torque T (in units of Nm), then the circle on the tangent intention of the force F = T / r, because power is defined as work done Work = F × 2πr = (T / r) × 2πr = 2πT
multiplied by engine speed (rpm) is the go done per minute, merely the power P of the element is Nm / sec, so the need to divide by 60, converted into work done per second. Into the formula: P = T2πrpm/60, after achieving the constants, we win P (kW) = Trpm/9545.

be seen from the upon, a vehicle power displacement from the engine to the wheels, need to all over multiple sets of gear so some dress and cut, if the German system of measuring horsepower is delivered to the wheels on the vehicle, then use the same engine in different models of power output should be another, attempt to take bmw330 and bmw530 contrast its power are 225hp/5900rpm; conclusion, the data on deceit or bmw, or its engine output is weighed web.