Describe the working of a Standard Bendix Drive used in starter motors.

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written 8.3 years ago by

teamques10 ★ 68k

A Bendix drive is a type of engagement mechanism used in starter motors of internal combustion engines.
The device allows the pinion gear of the starter motor to engage or disengage the flywheel of the engine automatically, when the starter is powered or when the engine fires, respectively.
The Bendix system places the starter drive pinion on a helical drive spring.
When the starter motor begins turning, the inertia of the drive pinion assembly causes it to wind the spring, forcing the length of the spring to change and engage with the ring gear.
When the engine starts, back drive from the ring gear causes the drive pinion to exceed the rotation speed of the starter, at which point the drive pinion is forced back and out of mesh with the ring gear.

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