JPS5977080A - Distributor of internal-combustion engine - Google Patents

Abstract

PURPOSE:To prevent the occurrence of bending and stretching of a connection lead wire and to prevent disconnection of the wire and production of a change in advance angle properties, by securely supporting a pickup coil and a control circuit to a distributor housing in a distributor. CONSTITUTION:A housing 1 of a distributor pivotally supports a shaft 3, having projecting magnets 4 being of the same number as that of cylinders, through a sleeve 3A. A support stand 6 is secured to a fixed base 5, and a case 9 incorporating a control circuit 8 is secured thereon. The case 9 incorporates a pickup coil 13 at an annular part 12 at the forward end thereof, and incorporates the control circuit 8 at a base part 14 of the case. The coil 13 and the control circuit 8 are interconnected in the case 9 through a signal terminal 15, and the output of the control circuit 8 is fed to the outside through an output terminal 16 emerging upward from the case 9. This constitution prevents bending and stretching of both of a lead wire, interconnecting the pickup coil and the control circuit, and a lead wire extending from the control circuit, and prevents the occurrence of disconnection of the wires and production of a change in advance angle properties.

Description

[Detailed Description of the Invention] [Original Field of the Invention] The present invention relates to a power distribution device for an internal combustion engine, and in particular to a pickup coil that fluorifies an ignition signal and a control that controls the primary current of the ignition coil in response to an ignition signal. This invention relates to a power distribution device with a built-in non-contact ignition device consisting of a circuit.

[Prior art]

In a power distribution device with a built-in conventional non-contact ignition device,
The pickup coil (installed on a movable base) is installed in order to interlink the pickup coil with a magnetic path whose magnetic flux changes in synchronization with the rotation of the engine. Therefore, if the control circuit is fixed to the housing in an immovable state, it will save money. Jk - The lead wire that is electrically connected is bent and stretched by one rotational movement in the i'' movement, and as a result of step 7, the lead shaft is torn off, and the rigidity of the lead wire prevents the rotational movement of the movable base. Due to the accelerated force, the advance angle control by the negative pressure advance angle mechanism becomes inaccurate.

However, in some cases, the control circuit is installed on a movable base together with the pickup coil, but in this case, the lead wire for drawing the output of the control circuit to the outside of the power distribution device may break in the above four ways, or lead angle control adversely affect.

[Purpose of the invention]

An object of the present invention is to prevent the lead wires connecting the pickup coil and the control circuit and the lead wires leading the output of the control circuit to the outside from bending or stretching.

[Summary of the invention]

A feature of the present invention is that the pickup coil is immovably fixed relative to the housing, and the control circuit electrically connected to the pickup coil is immovably fixed relative to the housing. The pick-up coil and the control circuit are made so that they cannot be rotated relative to each other, and the pickup coil and the control circuit are made so that they cannot be rotated relative to the housing.

[Embodiments of the Invention] Examples of the present invention will be described in detail below with reference to the drawings. In Figures 1 and 2, 1 is the housing of the power distributor, 2
indicates a cap, and a shaft 3 driven by a camshaft of an engine is rotatably held in the housing 1. A sleeve 3A is fitted onto the shaft 3, and a ring-shaped reluctor 4 is fixed to the outside of the sleeve 3A.
Magnetic poles 4A, 4B, 4C, and 4D are provided in a protruding manner. A fixed base 5 shaped like a disk and having a hole in the center for the shaft 3 to pass through is fixed to the housing 1 by means of screws or the like. A support 6 for attaching a control circuit is fixed to one side of the fixed base 5 with screws 7 around the shaft 3. A case 9 containing a control circuit 8 is fixed onto the support base 6 with screws 10 and 11. As shown in FIG. 3, this case 9 has a coil 13 built into the ring-shaped portion 12 at the tip and a control circuit 8 built into the case base 14. The coil 13 and the control circuit 8 are connected within the case 9 through a signal terminal 15, and the output of the control circuit 8 is led out from an output terminal 16 projecting upward from the case 9. Expanded portions 17 and 18 are provided on both sides of the case base 140, and holes 19 and 20 for mounting are provided here. Further, the shaft 3 is made to pass through the mantle 21 formed by the ring-shaped part 12. The movable base 22 is formed into a disk shape with a hole in the center for passing the shaft 3 through, and a cylindrical portion 22A that bulges in one direction is formed around the center portion. This cylindrical part 22A is fitted into the shaft through hole of the fixed base 5, and the fixed base 5 is moved from above and below by the ball 23 provided between the movable base 22 and the fixed base 5 and the ball 24 supported by the cylindrical part 22A. The movable heath 22 is held on the fixed base 5 so as to be rotatable about the shaft 3. A part of the movable base 22 is cut out with a margin at the support base 5 so that the support base 6 attached to one side of the fixed base 5 does not interfere with the rotation of the movable base 22. The movable base 22 has a vacuum advance mechanism 25
The movable base 22 is connected by a screw 27 to a lever -26 extending from the movable base 22, and is configured to be rotated by the rotation of the shaft 3 in accordance with the operation of the vacuum advance angle mechanism 25. A ring-shaped magnet 2 is attached to the inner peripheral surface of the cylindrical portion 22A of the movable base 220.
8 is fixed to the shaft 3 with a certain gap therebetween. A stator 29 is fixed on the movable base 22 by screws 30 and 31 on the opposite side of the control circuit 390, with the shaft 3 in the middle. Two magnetic poles 32 and 33 are formed. These magnetic poles 32, 33 sandwich the reluctor 4 with a certain gap Gl, G2 18
It is formed on the 0 degree diagonal. An IJ-wire 34 is attached to the output terminal 16 and drawn out from the housing 1. 35.36 is the far lL attached to the sleeve 3A
? This mechanism is well known, so its explanation will be omitted. The flow indicated by φ in the figure indicates the flow of magnetic flux created by the water-immersed magnet 28, and the magnetic flux emitted from the magnet 28 flows through the movable base 22, the stator 29, the reluctor 4, and the shaft 3.
Reflux through. In this power distributor, the magnetic poles 32 and 33 of the stator 29 face the reluctor 4 at 180 degrees via the caps Gl and G2fc, so the cap Gl.

The magnetic reluctance of G2 is determined by the approximately average length of these caps, and the eccentricity of the reluctor 4 or shaft 3 causes the gap G1. Even if G2 changes, its average value is always constant, so the signal voltage hardly changes and a stable signal output can be obtained.

The change in magnetic flux caused by the rotation of the shaft 3 is detected by the coil 13, amplified by the control circuit 8, and sent to the lead wire 34.
It is pulled out to the outside and used as a signal to control the ignition coil. In this power distributor, the magnetic poles of the stator 29 are arranged diagonally at 180 degrees, the main body of the stator 29 is brought to one side of the housing 10, and the case 9 of the control circuit 8 is attached to one side of the remaining portion. Therefore, the control circuit case 9 can be accommodated within the housing 7 without making the housing 1 thicker. As a result, interference between the control circuit and engine auxiliary equipment can be avoided, and the influence of water, dust, and salt can be reduced. Also, in this distributor, coil 1
3 and the control circuit 8 are integrally housed in a case 9, and since this case 9 is fixed to the fixed base 5, even if the vacuum advancer 25 operates and the movable base 22 moves, the lead @34
is not bent. Therefore, it has good durability. Furthermore, in this power distributor, the stator 29 has two magnetic poles, and the number of magnetic poles is 18.
Since they are arranged diagonally at 0 degrees, if the number of cylinders in the engine is even, it is only necessary to replace the reluctor 4 accordingly.

〔Effect of the invention〕

As explained above, according to the first invention of the present application, since the pickup coil and the control circuit are fixedly supported on the power distribution device housing in the power distribution device, the lead wire connecting the pickup coil and the control circuit and the control circuit can be drawn out. It was possible to prevent any of the lead wires from bending or stretching.

As a result, breakage of the lead wire and fluctuations in advance angle characteristics can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional view of a power distribution device showing an embodiment of the present invention;
FIG. 2 is a plan view of the power distributor with the cap 2 removed, and FIG. 3 is a perspective view showing the control circuit area in a partially sectional view. DESCRIPTION OF SYMBOLS 1... Housing, 3... Shaft, 4... Reluctor, 5... Fixed base, 6... Support stand, 8...
Control circuit, 9... Control circuit case, 13... Coil, 22... Movable base, 28... Magnet, 29...
Stator, 32.33...Magnetic pole, Gl, G2...Cap. Agent Patent Attorney Akio Stomahashi 2 Mouth? fortune telling

Claims (1)

[Claims] 1. A magnetic path forming means for forming a magnetic path in which the magnetic flux changes in synchronization with the rotation of the engine, a pickup coil for detecting changes in the magnetic flux in the magnetic path, and a pickup coil that receives the output of the pickup coil. A control circuit for controlling the primary current of the ignition coil is housed in the no-using, the pickup coil being fixedly held in an immovable state with respect to the no-using, and electrically connected to the pickup coil. A power distribution device for an internal combustion engine, characterized in that the connected control circuit is immovably fixed to the housing. 2. In what is stated in claim ’1,
The pickup coil and the control circuit are immobilized in the housing by disposing the control circuit in a container that is immovably fixed to the housing, and fixing the pickup coil to the container. A power distributor for an internal combustion engine characterized by being fixed.