JPH06341365A - Distributor for internal combustion engine ignition - Google Patents

Abstract

(57) [Summary] [Object] The present invention eliminates the conventional housing, reduces the weight and the dimension in the radial direction, and
It is an object of the present invention to obtain a highly reliable waterproof structure by using a seal having substantially the same plane at the peripheral portion between the ignition coil and the unit. According to the present invention, the ignition coil 21, the unit 30, and the side surface of the cap 2 form an outer wall of the distributor, and a substantially flat seal is formed on a peripheral portion between the ignition coil 21 and the unit 30. 34 is interposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributor for ignition of an internal combustion engine in which the primary coil energization current of an ignition coil is interrupted by a primary current interrupting means of a unit.

[0002]

2. Description of the Related Art FIG. 5 is a side sectional view showing an example of a conventional internal combustion engine ignition power distributor, 1 is a housing made of aluminum, 2 is a center electrode 18 and a spark plug (not shown) of each cylinder (not shown). A cap 4 having a peripheral electrode 3 connected to a high-voltage cord connected to (not shown) and covering the opening of the housing 1 is an ignition coil arranged in the housing 1, and includes a primary coil, a secondary coil and It has an iron core. Reference numeral 5 is a shaft which is supported by the housing 1 and is rotated in synchronization with a crankshaft (not shown) of the internal combustion engine, 6 is a signal plate fixed to the shaft 5 via a blank 7, and 8 is fixed to the housing 1. In addition, this unit 8 is a unit through which the shaft 5 penetrates.
A crank angle sensor unit 12 that detects a crankshaft rotation angle by combination with a signal plate 6 and outputs crank rotation angle information to a control computer, and a primary coil that interrupts the primary coil energization current of the ignition coil 4 in response to a signal from the control computer. A power transistor, which is a means for connecting and disconnecting current, and a control unit that controls the operation of the power transistor are integrated. 9 is a rotor fixed to the blank 7, which distributes the secondary high-voltage output to a predetermined spark plug in synchronization with the rotation of the crankshaft, and 10 is a spark discharge of the resin part and the high-voltage distribution part which prevent leakage from the high-voltage distribution part A cover integrated with a shield plate for preventing generated noise, 11 is a seal member interposed between the cap 2 and the housing 1, 16 is fixed to the housing 1 with a screw (not shown), and the ignition coil 4 is housed. It is a plate for fixing to 1.

In the internal-combustion-engine ignition distributor having the above structure, when the shaft 5 rotates due to the rotation of the crankshaft of the internal-combustion engine, the signal plate 6 integrally fixed thereto also rotates and passes through the crank angle sensor section 12. Each time the signal plate 6 interrupts the light of the crank angle sensor unit 12,
As a result, the crank angle sensor unit 12 outputs the crankshaft rotation angle information to the control computer. The power transistor uses the signal from the control computer for the ignition coil 4
The secondary current is intermittently generated, and a secondary voltage is generated in the ignition coil 4 at the ignition timing. This secondary voltage is sequentially distributed to the peripheral electrodes 3 as the rotor 9 rotates, the ignition plugs of each cylinder are sequentially ignited, and the internal combustion engine is continuously operated.

[0004]

In the conventional internal combustion engine ignition distributor configured as described above, the housing 1 is provided to protect the ignition coil 4 and the unit 8 from dust and water.
However, there is a problem in that the weight of the housing 1 increases the overall weight and also increases the radial dimension.

Also, the ignition coil 4 and the unit 8
Although not shown in the figure, connectors for connecting to the outside are respectively formed, and the connectors are led out to the outside of the housing 1. However, the sealing structure of the leading portion is complicated, and There was also the problem of low reliability.

The present invention has been made in order to solve the above problems, and it is possible to reduce the overall weight and radial dimension, and an internal combustion engine having a highly reliable waterproof function. The purpose is to obtain a distributor for engine ignition.

[0007]

In the internal combustion engine ignition distributor according to the present invention, the ignition coil, the side surface of the unit and the cap constitute the outer wall of the distributor, and the ignition coil and the unit are connected between the ignition coil and the unit. A seal having substantially the same plane is provided in the peripheral portion.

[0008]

In the present invention, the conventional housing is eliminated, the weight and the size in the radial direction are reduced, and the peripheral portion between the ignition coil and the unit is provided with a substantially coplanar seal, thereby improving reliability. A high waterproof structure can be obtained.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a plan view of a unit of FIG. 1, FIG. 4 is a plan view of an ignition coil of FIG. The same or corresponding portions as those in No. 5 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, 20 is a base for supporting the shaft 5 and 21 is an ignition coil through which the shaft 5 penetrates. The ignition coil 21 is wound around an iron core 22 and an iron core 22 in a housing as shown in FIG. The coil that is turned is housed, and the inside of the housing is filled with an insulator. Reference numeral 23 is a bush provided on the peripheral portion of the ignition coil 21 at a circumferential interval with being integrally formed with a plurality of casings, and 24 is a base penetrating each bush 23 and a base.
Screws screwed to 20; 25 is a protrusion formed on the outer peripheral portion of the lower surface of the ignition coil 21 and fitted to the step 26 of the base 20; 27 is an ignition coil 21 protruding from the outer peripheral portion of the ignition coil 21. The secondary high-voltage terminal connection portion for sending the secondary high-voltage to the cap 2, 28 is integrally molded with the housing of the ignition coil 21, and the ignition coil for connecting the primary coil of the ignition coil 21 and an external power source. Connector.

Reference numeral 30 denotes a unit which is screwed to the peripheral portion of the base 20 with screws 32 together with the cover 10 and the cap 2.
This unit 30 includes a crank angle sensor unit 33 that detects the crankshaft rotation angle of the coil and outputs crank rotation angle information to the control computer, and a power supply that interrupts the primary coil conduction current of the ignition coil 21 in response to a signal from the control computer. The transistor and its control unit are integrated. 34 is the first seal in the same plane provided between the ignition coil 21 and the unit 30, and 35 is the unit 30
High-voltage terminal connection part 27 of the secondary coil formed on the outer periphery of the
A through hole for passing through, 36 is the cover 10 and the cap 2
A coplanar second seal 37, which is provided between and, is integrally molded with the unit 30 and transmits a signal from the control computer to the control unit, and also supplies the drive voltage to the crank angle sensor unit 33 and the power transistor. A unit connector for applying a voltage, 38 is a female-side unit terminal integrally molded with the unit 30, and this unit terminal 38 should be coupled with an male-side ignition coil terminal 39 integrally molded with the housing of the ignition coil 21. Thus, the power transistor and the primary coil are electrically connected. Here, the coplanar seal means a seal which is subjected to a unidirectional stress generated by the fixing means such as the screw 32 and which is waterproof on the entire circumference.

In the internal combustion engine ignition distributor thus constructed, the conventional housing 1 is eliminated, and the weight and the radial dimension are reduced. A protrusion 25 and a step 26 are provided between the base 20 and the ignition coil 21 to form a labyrinth seal structure, and a first seal 34 is interposed between the ignition coil 21 and the unit 30. Moreover, since the second seal 36 is interposed between the cover 10 and the cap 2, the waterproofness and dustproofness are not inferior to the conventional one having the housing 1.

Also, the ignition coil 21 and the unit 30
Since the seal structure between and is a simple planar structure as can be seen from the first seal 34, and the structure in which the pressure is evenly applied to the entire circumference when the screw 32 is fastened, the reliability of the waterproof mechanism is high.

In the above embodiment, the optical distributor is described as the distributor for ignition of the internal combustion engine, but a Hall effect type or magnetic type distributor may be used.

[0015]

As described above, according to the distributor for ignition of an internal combustion engine of the present invention, the conventional housing is eliminated, and the weight and the radial dimension are reduced.

Further, the sealing structure between the ignition coil and the unit may be a simple planar structure, and there is an effect that a waterproofing mechanism which is easy to process and has high reliability can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of the unit of FIG.

4 is a plan view of the ignition coil shown in FIG. 1. FIG.

FIG. 5 is a side sectional view showing an example of a conventional internal combustion engine ignition distributor.

[Explanation of symbols]

 2 Cap 3 Peripheral electrode 5 Shaft 9 Rotor 18 Center electrode 20 Base 21 Ignition coil 22 Iron core 27 Connection part 30 Unit 31 Crank angle sensor part 32 Screw 34 First seal

Claims (1)

[Claims] 1. A base for supporting a shaft which is rotated in synchronization with a crankshaft of an internal combustion engine, an iron core which penetrates the shaft, and a primary coil and a secondary coil which are wound around the iron core. An ignition coil that stores therein, a unit in which a crank angle sensor unit that detects a rotation angle of the crank shaft and an electronic circuit unit that receives a signal from the crank angle sensor unit are integrated, and the shaft, A rotor that rotates integrally, and a cap that has a peripheral electrode that faces the rotor and that covers the rotor are provided, and the ignition coil, the unit, and the side surface portion of the cap constitute an outer wall of the distributor.
A distributor for ignition of an internal combustion engine, wherein a seal having a substantially coplanar shape is provided at a peripheral portion between the ignition coil and the unit.