Engine starter

Abstract

An engine starter capable of finally cranking a crankshaft in forward direction after driving in reverse direction at least under specified conditions so that a suitable pendulum start operation can be surely performed, wherein, a motor controls a rotating speed for reversely rotating the crankshaft so that the crankshaft does not come out of the top dead point from an expansion stroke side at the time of reverse rotation, whereby a large compressive repulsion can be provided by controlling the rotating speed so that the crankshaft stops near the top dead center without coming out of the top dead center, a large assist force or an entrance length can be provided when the crankshaft is reversed and driven in forward direction, assured start is enabled, and the size of the motor can be reduced and the power consumption thereof can be improved.

Description

technical field [0001] The present invention relates to engine starting devices. Background technique [0002] In the past, motors were used to rotate the power output shafts in automobiles, and some motors were used as generators. In this way, the starter and the generator can be used both with one electric motor, thereby simplifying the auxiliary equipment of the engine. [0003] In the starting device, since the position of the piston is not certain when the engine is started, it may be started from a stopped state at the position before the compression stroke, or it may be reliably started in a cold state such as viscous resistance, so it is necessary to consider To increase the output power of the motor, there is a problem of increasing the size of the motor. [0004] In order to start under the above-mentioned conditions even if the output power of the engine is very small, it is sufficient to make a swing type starter that drives the engine once in reverse and then ...

AI Technical Summary

Problems solved by technology

In order to detect the position of the rotational power output shaft at the time of restarting like this, it is conceivable to install an encoder that can detect the absolute angle, but there is a problem that the cost of the device is high.

[0008] However, due to the large rotation angle (360 degrees) used to detect the cycle, when the rotation speed of the crankshaft changes greatly during one revolution, such as during rapid acceleration and deceleration or inaccurate ignition, sometimes The relationship between the size of the cycle is opposite, and sometimes it may not be possible to distinguish the exhaust stroke from the compression stroke

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