Stall (engine)
Astallis the slowing or stopping of a process, and, in the case of anengine,refers to a sudden stopping of the engine turning,[1]usually brought about accidentally.
It is commonly applied to the phenomenon whereby an engine abruptly ceases operating and stops turning. It might be due to not getting enoughair,energy,fuel,orelectric spark,fuel starvation,a mechanical failure, or in response to a sudden increase in engine load.[1][2]This increase in engine load is common in vehicles with amanual transmissionwhen theclutchis released too suddenly.[3]
The ways in which a car can stall are usually down to the driver, especially with a manual transmission. For instance, if a driver takes their foot off the clutch too quickly while stationary then the car will stall; taking the foot off the clutch slowly will stop this from happening. Stalling also happens when the driver forgets to depress the clutch and/or change to neutral while coming to a stop.[3]Stalling can be dangerous, especially in heavy traffic.[1]
A car fitted with anautomatic transmissioncould also have its engine stalled when the vehicle is travelling in the opposite direction to the selected gear.[4]For example, if the selector is in the 'D' position and the car is moving backwards, (on a steep enough hill to overcome the torque from thetorque converter) the engine will stall, due to the fact that the engine is forced to turn in the opposite direction to what it is actually doing. This is because, hypothetically, if the car is rolling backward fast enough, the force from the rotating wheels will be transmitted backward through the transmission and act as a sudden load on the engine.
Digital electronics fuel injectionandECUignition systemshave greatly reduced stalling in modern engines.[5]
Anti-stall systems
[edit]Ananti-stall systemis an automatically operated electronic clutch control device preventing the stalling of an engine[6]by engaging the clutch when the ECU detects that the engine revs are too low. They are used in motorsports such asFormula OneandIndy Car,[7]but notFormula 2andFormula 3,and may be regarded as a driver aid[8][9]since it usually keeps the engine running even if the car stops on track while in gear. It is also sometimes used on production cars.[10]
See also
[edit]References
[edit]- ^abcSchultz, Mort (March 1979),"How to stop stalling",Popular Mechanics,pp. 128–130,ISSN0032-4558,OCLC3643271,retrieved13 November2014
- ^Hillier, Victor A. W. (1990),Fundamentals of Motor Vehicle Technology(4th ed.), Cheltenham: Nelson Thornes, p. 223,ISBN9780748705313,OCLC46761850,retrieved13 November2014
- ^abWardlaw, Christian (11 August 2014),"Get the most out of your car: How to drive a manual transmission",Daily News,New York, archived fromthe originalon 13 August 2014,retrieved14 November2014
- ^Roth, Dan (20 August 2009),"What Would Happen If You Put Your Car In Reverse While Driving?",AOL,archived fromthe originalon 26 August 2009,retrieved14 November2014
- ^Hatch, Steve V. (2012),Computerized engine controls(9th ed.), Clifton Park: Delmar, Cengage Learning, p. 529,ISBN9781111134907,OCLC676729348,retrieved13 November2014
- ^What Is Anti-Stall On An F1 Car? | F1 Explained
- ^New-to-IZOD IndyCar Series anti-stall system is available
- ^Todt proposes radical new ban on "driver aids" in Formula 1 | RaceFans
- ^F1: Little support for proposed ban on anti-stall and 'driver aids' | RaceFans
- ^Ny Mercedes Vision
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