jakosovittimen

Jakosovitin is the term used in automotive engineering for the timing mechanism that synchronizes the rotation of the crankshaft and the camshaft(s) in an internal combustion engine. Its primary purpose is to ensure that the opening and closing of the intake and exhaust valves occurs at the correct points in the engine's cycle, which is essential for proper air-fuel intake, exhaust scavenging, and overall engine performance. The mechanism may be realized using a timing belt, timing chain, or a set of timing gears, often driven by the crankshaft and driving one or more camshafts. A belt or chain is typically kept under tension by a tensioner and may include idler gears to maintain alignment.

Maintenance and failure: Because the timing relationship is critical, many engines use timing belts with scheduled replacement, while chain-driven systems are generally longer-lasting but can still stretch or wear. Mis-timing can result in rough running, reduced power, increased emissions, or in interference engines, valve and piston damage if timing is lost while the piston is in the compression stroke. Signs of a failing jakosovitin include unusual engine noises, poor starting, misfires, or a check-engine light. Diagnostics involve inspection of timing marks, belt/chain wear, tensioner condition, and valve clearance where accessible.