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The driver comes off the accelerator, the engine quickly goes into overrun but there is a short delay before the vehicle feels as though it has been shunted forwards slightly. The driver gets on the accelerator after the engine has been on overrun, there is a short delay before the vehicle feels as though it has been shunted backwards slightly.
Such add-on overdrive boxes were available from the 1930s to the 1970s for cars and light trucks. Today, most petrol and diesel cars and trucks come with an overdrive transmission because of the benefit to fuel economy. [4] Overdrive is included in both automatic and manual transmissions as an extra gear (or two in some cases). [5]
Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.
Dieseling or engine run-on is a condition that can occur in spark-plug-ignited, gasoline-powered internal combustion engines, whereby the engine keeps running for a short period after being turned off, drawing fuel through the carburetor, into the engine and igniting it without a spark.
Once the engine has turned over and is running, the overrun clutch releases the starter from the flywheel and prevents the gears from re-meshing (as in an accidental turning of the ignition key) while the engine is running. A freewheel clutch is now used in many motorcycles with an electric starter motor. It is used on many combustion-engined ...
A cold start is an attempt to start a vehicle's engine when ambient temperatures are much lower than its normal operating temperature. [1] A cold start can be difficult for an engine due to higher viscosity of oil and fuel in cold temperatures.
Up until the 1980s, Carfax said vehicles had carburetors, a component that regulates the mix of air and fuel in the engine. At the time, warming the car in the winter made sense since it could ...
It should have no effect to the overdrive: In other words driving with overdrive off your vehicle consumes more fuel wether you use cruise control or not. As stated before, in this case overdrive should be used unless extra pulling power is required... —Preceding unsigned comment added by 80.223.93.188 23:56, 6 January 2009 (UTC)