On most automotive engines, the timing is set based on the #1 cylinder. The distributor can be rotated slightly until the reference pointer aligns with the specified point on the timing scale.įuel-injected engines, or engines with microprocessor controls may require special procedures to allow basic spark timing to be observed without control effects from the engine computer. A reference pointer is attached to the flywheel housing or other fixed point, and an engraved scale gives the offset between the spark time and the top dead centre position of the piston in the cylinder. The apparent position of the marks, frozen by the stroboscopic effect, indicates the current timing of the spark in relation to piston position. The timing light is connected to the ignition circuit and used to illuminate the timing marks on the engine's crankshaft pulley or flywheel, with the engine running. Modern electronically controlled passenger vehicle engines require use of a scan tool to display ignition timing. The black clamp connects to the battery -, the red clamp to +, the green one to the breaker side of the coil (for RPM), the big black clamp in the foreground is an inductive pick-up that clamps around a spark plug wire.Ī timing light is a stroboscope used to dynamically set the ignition timing of an Otto cycle or similar internal combustion engine equipped with a distributor. Timing light, combination instrument with RPM, volt meter and dwell angle meter. JSTOR ( May 2011) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. ![]() This article needs additional citations for verification.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |