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• Torque
  ...)|couple]], originated with the work of [[Archimedes]] on [[lever]]s. The rotational analogues of [[force]], [[mass]], and [[acceleration]] are torque, [[moment ...al-combustion]] engines produce useful torque only over a limited range of rotational speeds (typically from around 1,000–6,000 rpm for a small car). The varyi
  13 KB (2,031 words) - 10:19, 27 September 2009
• Double clutch
  ...example is trying to shift into a gear while traveling outside the gear's speed or directional range, such as reverse while moving forward. ...on can be very difficult to master, as it requires the driver to gauge the speed of the vehicle and throttle accurately. Double clutching occurs if the clu
  6 KB (1,014 words) - 08:51, 1 October 2009
• Inertia
  ...meaning distinct from mass (for linear motion) and moment of inertia (for rotational motion). ...mpetus. Buridan further held that the impetus of a body increased with the speed with which it was set in motion, and with its quantity of matter. Clearly,
  10 KB (1,506 words) - 13:22, 8 October 2009
• Four-stroke
  ...sed in early four-stroke engines. It was soon discovered, however, that at rotational speeds approaching 100 revolutions per minute ([[RPM]]) or greater, the [[e At high rotational speeds, consistent flow through the intake and exhaust ports is maintained
  11 KB (1,765 words) - 11:04, 10 November 2005
• Four-stroke cycle
  ...sed in early four-stroke engines. It was soon discovered, however, that at rotational speeds approaching 100 revolutions per minute ([[RPM]]) or greater, the [[e At high rotational speeds, consistent flow through the intake and exhaust ports is maintained
  11 KB (1,775 words) - 09:48, 2 August 2009
• Engine braking
  ...eir relatively flimsy engine parts. The engine maintains a high rotational speed to dissipate a lot of power without forcing too much strain on the engine. ...en used, leaving the brakes available to make emergency stops. The desired speed is maintained by using engine braking to counteract the acceleration due to
  5 KB (766 words) - 22:08, 12 July 2009
• Four stroke cycle
  ...sed in early four-stroke engines. It was soon discovered, however, that at rotational speeds approaching 100 revolutions per minute ([[RPM]]) or greater, the exh At high rotational speeds, consistent flow through the intake and exhaust ports is maintained
  12 KB (1,944 words) - 22:56, 14 June 2009
• Differential (mechanics)
  ...[Kart racing|kart]]s, both driving wheels are forced to rotate at the same speed, usually on a common [[axle]] driven by a simple chain-drive mechanism. Whe ...ar may make 10 full revolutions, and during that time, the left wheel will speed up because it has further to travel, and the right wheel will slow down cor
  12 KB (1,976 words) - 09:04, 8 October 2009
• Turbo
  ...ust gas entering the turbocharger's turbine. This regulates the rotational speed of the turbine and the output of the compressor. The wastegate is opened an ...peed operation of the engine it is important to let the engine run at idle speed for one to three minutes before turning off the engine. [[Saab automobile|S
  20 KB (3,092 words) - 23:47, 7 August 2009
• Forced induction
  ...ding to the engine speed, thus providing power from extra capacity at high speed, but without wasting fuel at lower speeds. A Nitrous Oxide system is not a ...n the exhaust system tract. A supercharger uses torque generated from the rotational mass internal to the engine through the crank pulley. A turbo relies on th
  5 KB (791 words) - 09:19, 7 October 2009
• Limited slip differential
  ...al [[velocity]] of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an [[automobile]], such limited slip ...casing, making both axles and subsequently both wheels, rotate at the same speed.
  7 KB (1,085 words) - 09:05, 8 October 2009
• Rotary combustion engine
  ...iprocating motion of the piston with its inherent vibration and rotational-speed-related mechanical stress. As of 2005 the Wankel engine is the only success
  7 KB (1,137 words) - 20:22, 22 September 2009
• Transmission
  ...on]]al speed of an input shaft is changed, resulting in a different output speed. However, some of the simplest gearboxes merely change the physical direct ...be an "[[overdrive (mechanics)|overdrive]]" type that increases the output speed.
  12 KB (1,865 words) - 06:22, 26 September 2016
• Turbocharger
  ...ust gas entering the turbocharger's turbine. This regulates the rotational speed of the turbine and the output of the compressor. The wastegate is opened an ...peed operation of the engine it is important to let the engine run at idle speed for one to three minutes before turning off the engine. [[Saab automobile|S
  19 KB (3,049 words) - 13:22, 8 October 2009
• Bicycle gearing
  ...of gears are appropriate for different people and styles of cycling. Multi-speed bicycles allow gear selection to suit the circumstances, e.g. it may be com ...] of the drivetrain of the bicycle. On [[single-speed bicycle]]s and multi-speed bicycles using [[derailleur gears]], the gear ratio is the ratio of the num
  24 KB (3,509 words) - 23:29, 3 July 2009
• Electric vehicle
  ...ectric generator is usually a more practical converter for this high speed rotational energy than a mechanical gearing system would be. ...man named [[Robert Davidson]] built an electric locomotive that attained a speed of four miles an hour. In [[England]] a patent was granted in 1840 for the
  18 KB (2,741 words) - 15:59, 24 June 2009
• Wankel engine
  ...nce the Wankel output shaft is [[gear]]ed to spin at three times the rotor speed, this becomes one combustion 'stroke' per output shaft revolution per rotor ...t also the ability to produce more power by running at higher [[rotational speed|rpm]].
  23 KB (3,604 words) - 09:49, 2 August 2009
• Pushrod engine
  ...st production cars because engines could not run long and reliably at high speed due to other factors. This was a minor concern given the benefits in simpli ** I-head engines have more rotational mass, suffer more easily from valve "float", and exhibit a tendency for the
  10 KB (1,635 words) - 08:54, 4 August 2009
• Electric car
  ...nerator, which then drives the wheel motors. It might seem odd to convert rotational energy to electrical energy, only to convert it back, but flywheels need to ...man named [[Robert Davidson]] built an electric locomotive that attained a speed of four miles an hour. In [[England]] a patent was granted in 1840 for the
  9 KB (1,323 words) - 08:15, 8 October 2009
• Formula One engines
  ...lly less than 7,000 rpm. However, the [[torque]] (turning force at a given speed) of a Formula One engine is not much higher than a conventional petrol engi ...tional metal valve springs used inside the engine to close the valves. The speed required to operate the engine valves at a higher RPM is much greater than
  22 KB (3,308 words) - 13:51, 19 March 2009

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