Käivitusomadusi

Käivitusomadusi refers to the starting characteristics of an engine, particularly internal combustion engines. This encompasses a range of factors that determine how reliably and efficiently an engine begins to operate after a period of inactivity. Key aspects of käivitusomadusi include the ease with which the engine starts, the speed of initial rotation, and the stability of operation immediately after ignition.

Factors influencing käivitusomadusi are diverse. They include the fuel-air mixture, the quality of the spark or ignition, engine temperature, battery condition, and the effectiveness of the starter motor. For gasoline engines, proper fuel atomization and a strong spark are crucial for initiating combustion. Diesel engines rely on compression heat to ignite the fuel, making compression ratio and initial cranking speed important.

Cold starting is a significant test of käivitusomadusi. At low temperatures, engine oil becomes more viscous, increasing friction and making it harder for the starter motor to turn the engine. Fuel may also vaporize less readily. Modern engines often employ features like glow plugs (in diesel engines) or pre-heating systems to improve cold-start performance. The battery's ability to deliver sufficient current at low temperatures is also a critical component.

Overall, good käivitusomadusi means the engine starts promptly and runs smoothly with minimal hesitation or rough idling, regardless of ambient temperature or how long it has been stopped. This directly impacts user convenience and the overall perception of engine reliability.