The point of maximum power is somewhat lower than the absolute maximum RPM to which the engine is limited, the " redline" RPM. The power produced by an engine increases with the engine's RPM to a maximum, then falls away. the car could travel faster if it were in a lower gear, with the engine turning at higher RPM. The most fundamental meaning is that of an overall gear ratio between engine and wheels, such that the car is over-geared, and cannot reach its potential top speed, i.e. Overdrive is the operation of an automobile cruising at sustained speed with reduced engine revolutions per minute (RPM), leading to better fuel consumption, lower noise, and lower wear.
1960s Triumph gearbox with Laycock de Normanville electro-hydraulic operated overdrive Laycock de Normanville "J type" overdrive unit
A plate warns to only engage the unit in third and fourth gears. Please help improve this article by introducing citations to additional sources.įind sources: "Overdrive" mechanics – news Īn overdrive is sometimes a separate unit that fits into the back of a gearbox, as with this Fairey unit. Relevant discussion may be found on the talk page. This article relies largely or entirely on a single source.
0 kommentar(er)
