Starter — General Information (Renault Scenic 1)

To start an internal combustion engine, you need a small electric motor, a starter. In order for the engine to start at all, the starter must spin it up to a speed of at least 300 rpm. This is only possible if the starter works perfectly and the battery has sufficient charge.

The starter consists of a drive housing, a relay anchor housing, and a collector housing. The anchor and collector, as well as the brush holder, are located in the anchor housing and in the collector housing. The brush holder contains carbon brushes, which, although slowly, but still gradually wear out. If the carbon brushes are heavily worn out, the starter cannot operate flawlessly.

The drive housing contains a gear drive. If voltage is supplied to the starter through the ignition switch, the traction relay located in the starter housing pushes the gear along the helical splines to the flywheel ring gear. As soon as the gear reaches the stop against the spindle, a mechanical connection with the flywheel occurs. Now the starter can bring the engine to the required speed. If the engine starts, the gear is accelerated by the engine. For some time, it rotates faster than the starter and disengages, which leads to the termination of the connection between the starter and the engine.

Since a large current is required to start an internal combustion engine, the condition of the power wires should be checked during vehicle maintenance.

(Original of this article on the website renaultbook.ru)