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The ignition switch was designed to remove power from the vehicle's airbags when in the Off or Accessory mode. [11] Therefore, this was a safety hazard: If the switch changed from Run to Accessory and the vehicle was involved in an accident, it would no longer have power to release the airbags, and it would be difficult for the driver to steer ...
Some engines, such as GM's Premium V family, use crank position sensors which read a reluctor ring integral to the harmonic balancer. This is a much more accurate method of determining the position of the crankshaft and allows the computer to determine, within a few degrees, the exact position of the crankshaft (and thereby all connected ...
Since the early 2000s, many cars have used a 'coil-on-plug' direct ignition system, whereby a small ignition coil is located directly above the spark plug for each cylinder. This design means that high-voltage electricity is only present in the small distance between each coil and the spark plug.
At the time, GM marketed vehicles in the US under the Chevrolet, Pontiac, Oldsmobile, Buick, Cadillac, and GMC brands. Television commercials in the United States used actor Barry Coe as a spokesman. Jerome H. Peleaux was the creator and tester of the program for GM. Former logo of GM Certified Service, then GM Goodwrench
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.
In an overhead valve engine the valve lifters are sandwiched between pushrods and the camshaft. A hydraulic tappet, also known as a hydraulic valve lifter or hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine.
(January 2023) (Learn how and when to remove this message) For older vehicles, the driver needs to activate the glow plug for approximately 20 seconds before starting the engine. This is achieved by leaving the ignition switch in the "on" position, and only moving it to "start" once the glowplug has finished pre-heating the engine.
A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel. [1] These have the largest radius rotating at crankshaft speed and therefore are the place where marks at one degree intervals will be farthest apart.
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