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Engine starter

An engine starting and engine technology, which is applied in the direction of starting the engine, starting the motor with an engine, and engine components, etc., can solve the problem of not being able to make full use of the starting performance of inertial force, and achieve the effect of improving the starting performance.

Inactive Publication Date: 2003-12-03
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the back swing is large, it is difficult to stop the crankshaft to the desired position correctly, and the inertial force cannot be fully utilized to improve the starting performance

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. figure 2 It is a side view of an automatic two-wheeled vehicle with pedals to which the engine starting device of the present invention is applied. In this figure, a power unit 2 is suspended from a vehicle body frame 4 . The power unit 2 is equipped with a four-stroke engine E and a pedal drive unit at the front, and supports the rear wheel RW at the rear. Furthermore, the power unit 2 has a transmission and a speed reduction mechanism (both will be described in detail later) between the engine E and the rear wheels RW for changing and decelerating the output of the engine E and transmitting it to the rear wheels RW. The pedal force drive unit is a drive system provided separately from the engine drive system for driving the rear wheel RW with human power (pedal force); pedal shaft 3 and pedal 7 are provided as pedal force input means.

[0025] A steering shaf...

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PUM

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Abstract

The invention allows an accurate positioning to obtain a large inertia torque at starting. Especially, it prevents retrogradation that may occur when rotating an engine in the reverse direction by a motor and shutting down for positioning. At starting, the motor is energized by a first reverse rotation unit 111 to rotate the engine in the reverse direction to the position in the vicinity of the top dead center. After reverse rotation by the first reverse rotation unit 111, a second reverse rotation unit 113 energizes the engine further in the direction of reverse rotation with a small torque while reducing an exciting current to the motor. The exciting current is set to a degree that can obtain a braking effect for reducing retrogradation that may occur when the engine is stopped at a predetermined position within a high-load region after being rotated in the reverse direction. A stop position is set in advance between the top dead center on the compression stroke immediately before and the range of opening and closing operation of an exhaust valve, and whether or not the engine has reached the stop position may be recognized by a crank angle.

Description

technical field [0001] The present invention relates to an engine starting device, in particular an engine starting device which can easily override the high load region of the compression stroke, even with a small torque starter motor. Background technique [0002] During the compression stroke of the engine, a large load is required on the starter motor. Since the high load range is particularly before the top dead center, the starter motor needs a torque capable of exceeding the high load. In the prior art, in order to make the starter motor with small torque exceed the high load, it is considered to make the crankshaft reverse in the light load area in the forward direction, that is, to the front of the top dead center in the reverse direction, and then start from It is time to start forward rotation. By starting from the light load region in this way, it is possible to make full use of the inertial force of the engine and improve the starting performance. [0003] Ho...

Claims

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Application Information

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IPC IPC(8): F02D41/04F02N11/08F02N19/00
CPCF02N19/005F02D2041/0095F02N2019/007B60Y2200/12F02N11/0814F02D41/042F02N2019/008
Inventor 大田淳朗永露敏弥
Owner HONDA MOTOR CO LTD
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