õhkkäivitusmehhanism

õhkkäivitusmehhanism refers to an air starter system used to initiate the rotation of an internal combustion engine, typically a large diesel or gas engine. Instead of using an electric starter motor or manual cranking, these systems employ compressed air to turn the engine's flywheel or starting gear.

The principle of operation involves a pneumatic motor. Compressed air is stored in a receiver tank, usually charged by a compressor. When starting the engine, a valve releases this compressed air into the pneumatic motor. The air pressure drives a turbine or a vane-type rotor within the motor. This rotating motor is connected via a pinion gear to the engine's flywheel or a starter ring. The pinion engages with the ring gear, causing the engine to rotate. As the engine begins to fire and run under its own power, the pinion is typically disengaged.

õhkkäivitusmehhanism systems are favored in applications where electric starters are impractical due to extreme temperatures, explosive environments, or the need for high starting torque for very large engines. Examples include large industrial generators, marine engines, and heavy-duty construction equipment. They offer reliability in harsh conditions and can deliver significant starting power. Maintenance involves ensuring a reliable air supply, regular inspection of the pneumatic motor, and proper functioning of the control valves.