Engine start device

摘要

An engine starting device for an automatic idling stop system includes: a crank angle sensor for detecting a crank angle of an engine; a ring gear connected to a crankshaft of the engine, for transmitting rotation of the engine; ring gear rpm detecting section; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear push-out section for pushing out the pinion gear into meshing engagement with the ring gear; and pinion gear push-out control section for driving the pinion-gear push-out section to bring the pinion gear and the ring gear into meshing engagement when the ring gear rpm detected by the ring gear rotational speed detection section becomes smaller than a threshold value which is determined by at least one of the crank angle, a gear range, and a restart condition.

主权项

1. An engine starting device for an automatic idle-stop system for performing idle-stop when a predetermined idle-stop condition is satisfied and for restarting an engine when a restart condition is satisfied, comprising:
a crank-angle sensor for detecting a crank angle of the engine; a ring gear connected to a crankshaft of the engine; a ring-gear rpm detecting section for detecting an rpm of the ring gear; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; a pinion-gear push-out section for pushing out the pinion gear to bring the pinion gear into meshing engagement with the ring gear; and a pinion-gear push-out control section for driving the pinion-gear push-out section to bring the pinion gear and the ring gear into meshing engagement when the ring-gear rpm detected by the ring-gear rpm detecting section becomes smaller than a predetermined threshold value, wherein the predetermined threshold value is determined by at least one of the crank angle, a gear range, and the restart condition.