ignition timing


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ignition timing

[ig′nish·ən ‚tīm·iŋ]
(electricity)
The time of delivery of the spark from the coil to the spark plug in relation to the time the piston reaches the correct position for the power stroke in an internal combustion engine.

ignition timing

The timing of the ignition spark with respect to the piston position in the cylinder of a reciprocating engine. The ignition of the fuel-air mixture must take place when the piston is still moving upward during the compression stroke for the engine to produce maximum power. This ensures that the piston is pushed with the maximum force, as it starts moving down on its power stroke. See four-stroke cycle.
References in periodicals archive ?
This lowers the temperature of combustion in the engine, preventing knocking, expanding the range in which the engine can maintain the ideal air-fuel ratio and reducing the need to retard ignition timing.
The GT3 racing programme is to thank for the high-flow turbochargers, while revised ignition timing and a higher-capacity fuel pump plump up that peak power output.
For instance, if your ignition timing is very late, you'd have gasoline getting pushed into the exhaust system without first being combusted.
It features a new intake, revised exhaust, tweaked ignition timing and bigger turbos, an upgraded suspension, stickier tyres mounted on wider wheels, and a body kit that increases high-speed downforce.
As the brains of the automobile, ECUs control everything from the fuel or ignition timing to security or lights.
Honda's BLAST controls handle the fuel injection and ignition timing at takeoff for increased torque and off-the-line acceleration.
These detect wheelspin and adjust the fuel injection, throttle opening and ignition timing accordingly to reduce power.
The BF150/135 has been equipped with the same BLAST* (Boosted Low Speed Torque) air/fuel ratio and ignition timing technology made popular in Honda's mid-to-large outboard engine series, to deliver improved acceleration performance at low-to-medium engine speeds.
Using a small hand-held unit that the user can plug in, the software can be switched on the fly through different modes such as "Race Fuel" advanced ignition timing programme for when customers elect to use high octane petrol, or a "valet mode" can be selected to reduce power.
The remapping of the ignition timing is covered by Superchips' warranty, and costs pounds 445.
HCCI engine tests have shown that using high-octane fuel, such as iso-octane or gasoline, and diesel-like compression ratios, HCCI engines can achieve diesel-like efficiencies and low NO emissions [12-14] with stable ignition timing.
A xenon stroboscope for ignition timing is strong enough to use in daylight.