JPH04153582A - Distribution for igniting internal combustion engine - Google Patents

Abstract

PURPOSE:To facilitate the press-fitting work and positioning of a signal rotor for a shaft by installing the first and second signal rotors onto the shaft through a bush. CONSTITUTION:The first and second signal rotors 7 and 8 are press-fitted onto a bush 20 which is press-fitted onto a shaft 5. In a distributor 2 for igniting an internal combustion engine which is thus constituted, the first and second signal rotors 7 and 8 are press-fitted onto the bush 20 in a prescribed relative position relation, and the bush 20 is press-fitted to the prescribed position of the shaft 5, and the first and second signal rotors 7 and 8 are installed at the prescribed positions on the shaft 5. Accordingly, in an assembly line for the distributor, it is enough only to carry out the work for press-fitting the bush 20 which is integrally formed with first and second signal rotors 7 and 8 at a prescribed position of the shaft 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power distribution device for ignition of an internal combustion engine in which a first signal rotor and a second signal rotor are provided on a shaft.

[Conventional technology]

Fig. 2 is a side sectional view showing an example of a conventional internal combustion engine ignition power distribution device, in which 1 is an aluminum housing, 2 is connected to a spark plug (not shown) of each cylinder (not shown). A cap having a peripheral electrode 3 coupled to a high voltage cord and covering the opening of the housing 1; 4 a leak cover sandwiched between the housing 1 and the cap 2; 5 a crankshaft of an internal combustion engine (Fig. (not shown)
6 is a power distribution rotor fixed to the tip of the shaft 4; 7 is a first signal rotor having the shape shown in FIG. A second signal rotor having the shape shown in FIG. 4 is fitted above the first signal rotor 6, and 9 is a first magnetic pickup provided facing the first signal rotor 7. , 10 is a second magnetic pickup provided opposite to the second signal rotor 8.

In the internal combustion engine ignition power distributor configured as described above, when the shaft 5 rotates due to rotation of the crankshaft of the internal combustion engine, the first and second signal rotors 7.
8 also rotates. As a result, the protrusion 7a of the first signal rotor 7 approaches the first magnetic pickup 9, and the first
The magnetic pickup 9 outputs crankshaft rotation angle information to the control computer, and the primary current of the ignition coil is interrupted by a signal from the control computer, and a secondary voltage is generated in the ignition coil at the ignition timing. As the power distribution rotor 6 rotates, this secondary voltage is sequentially distributed to the surrounding poles 3 via the center electrode 11 and the rotor electrode 12, the spark plugs of each cylinder are sequentially ignited, and the internal combustion engine continues to operate. Further, as the shaft 5 rotates, the second signal rotor 8 integrated with the shaft 5 also rotates, and the protrusion 8a of the second signal rotor 8 approaches the second magnetic pickup 10, causing the second magnetic pickup 10 to move closer to the second signal rotor 8. The ignition cylinder is identified by the signal from the ignition cylinder.

[Problems to be Solved by the Invention] In the conventional internal combustion engine ignition power distribution device configured as described above, the first signal rotor 7 and the second signal rotor 8 are individually positioned at predetermined positions with respect to the shaft 5. The problem was that it had to be press-fitted into the power distribution device, making it difficult to perform full-scale work on the power distribution device assembly line.

This invention has been made to solve this problem, and allows the first signal rotor and the second signal rotor to be easily press-fitted into a predetermined position on the shaft 5, and also makes it possible to easily press fit the first signal rotor and the second signal rotor into predetermined positions on the shaft 5. in the first and second
An object of the present invention is to obtain a power distribution device for ignition of an internal combustion engine, which can easily perform positive work on the shaft of a signal rotor.

[Means to solve the problem]

The internal combustion engine ignition power distributor according to the present invention has a first signal rotor and a second signal rotor mounted on a shaft via a bush.

[Effect]

In this invention, the first signal rotor and the second
The first signal rotor and the second signal rotor are attached to the shaft at a predetermined position by press-fitting the signal rotor into the bushing at a predetermined position, and then press-fitting the bushing into a predetermined position on the shaft. Become.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing one embodiment of the present invention, and the same or corresponding parts as in FIGS. 2 to 4 are designated by the same reference numerals, and the explanation thereof will be omitted.

In the figure, a bushing 20 is press-fitted into the shaft 5, and a first signal rotor 7 and a second signal rotor 8 are press-fitted into this bushing 20.

In the internal combustion engine ignition power distribution device configured in this way, the first
The first signal rotor 7 and the second signal rotor 8 are press-fitted into the bushing 20 in a predetermined relative positional relationship, and then the bushing 20 is press-fitted into the shaft 5 at a predetermined position 1. The signal rotor 8 is attached to the shaft 5 at a predetermined position. Therefore, on the power distributor assembly line, the bushing 20 in which the first signal rotor 7 and the second signal rotor 8 are integrated may be press-fitted into a predetermined position of the shaft 5.

〔Effect of the invention〕

As explained above, according to the internal combustion engine ignition power distributor of the present invention, since the first signal rotor and the second signal rotor are provided on the shaft via the bushings, The straightening work on the shaft of the second signal rotor only takes one step, and the straightening work on the shafts of the first signal rotor and the second signal rotor on the assembly line becomes easy. Further, the adjustment work for the bushes of the first signal rotor and the second signal rotor can be performed in advance outside the assembly line process of the power distributor, and the first signal rotor and the second signal rotor in a predetermined positional relationship can be By simply press-fitting the bushing integrated with the rotor into a predetermined position on the shaft, the first signal rotor and the second signal rotor are provided at a predetermined position relative to the shaft, and the first signal rotor and the second signal rotor relative to the shaft This also has the effect of making it easier to position the signal rotor.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an embodiment of the present invention, Fig. 2 is a side sectional view showing an example of a conventional internal combustion engine ignition power distribution device, and Fig. 3 is a side sectional view showing an example of a conventional internal combustion engine ignition power distribution device. FIG. 4 is a plan view of the second signal rotor of FIG. 2. In the figure, 1 is the housing, 5 is the shaft, and 7 is the first
8 is a second signal rotor, and 20 is a bushing. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A shaft supported by a housing and rotated in synchronization with a crankshaft of an internal combustion engine; A second signal rotor for identifying a signal rotor and an ignition cylinder; In an internal combustion engine ignition power distribution device, the first signal rotor and the second signal rotor are provided on the shaft via a bush. A power distributor for internal combustion engine ignition, characterized by: