JP3068339U - Ignition device for internal combustion engine - Google Patents

Abstract

(57) [Problem] To provide an ignition device for an internal combustion engine that can be used even in a narrow assembled state. SOLUTION: An ignition coil 12 has a central longitudinal axis 1.
3 is formed as a rod-shaped ignition coil provided with an ignition plug 12 and can be inserted into an ignition plug hole of a cylinder head of an internal combustion engine.
3 form a part which is arranged substantially transversely.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is an ignition device for an internal combustion engine, wherein at least one ignition coil is provided, and the ignition coil is adapted to directly contact a spark plug of the internal combustion engine. A terminal is provided, and the high-voltage terminal is of a type having a noise suppression resistor for indirect connection with a spark plug.

[0002]

[Prior art]

 DE-A-392 080 discloses an ignition device for an internal combustion engine with a plurality of ignition coils, in which each ignition coil is provided on a cylinder head of the internal combustion engine. It is located above the spark plug hole. A high-voltage connector attached to each ignition coil and forming a connection between the high-voltage output terminal of the ignition coil and the connection pin of the ignition plug fixedly mounted in the ignition plug hole is connected to the ignition plug hole. Has been inserted.

[0003] The spark plug connector has a long and elongated cylindrical noise suppression resistor, and the longitudinal direction of the noise suppression resistor is aligned with the longitudinal direction of the spark plug hole.

[0004] The above-described arrangement of the ignition coils, with respect to the ignition plug connector attached to each ignition coil and its elongated noise suppression resistor, has the advantage that the ignition device is largely configured and in a narrow assembled state. Has the disadvantage that it is no longer usable.

[0005]

[Problems to be solved by the invention]

 The object of the present invention is therefore to improve an ignition device for an internal combustion engine of the type mentioned at the outset and to provide an ignition device which can be used even in a reduced assembly state.

[0006]

[Means for Solving the Problems]

 In order to solve this problem, in the configuration of the present invention, the ignition coil is formed as a rod-shaped ignition coil having a central longitudinal axis, and can be inserted into an ignition plug hole of a cylinder head of an internal combustion engine. The noise suppression resistor forms a part of the ignition coil which is arranged substantially transversely to the longitudinal axis.

[0007]

[Effect of the invention]

 The ignition device for an internal combustion engine configured according to the present invention has the following advantages over known devices. That is, in the device of the present invention, the above-mentioned drawbacks are satisfactorily eliminated. For this purpose, each ignition coil is formed as a rod-shaped ignition coil with a central longitudinal axis. The outer dimensions of the rod-shaped ignition coil are set so that the rod-shaped ignition coil can be directly inserted into the ignition plug hole provided in the cylinder head of the internal combustion engine and can also fulfill the function of the ignition plug connector. In this case, the noise suppression resistor of the spark plug connector is also housed in the ignition coil.

In this case, the noise suppression resistor is arranged substantially transversely to the longitudinal axis in order to extend the length of the ignition coil and thus keep the volume of the ignition device small.

[0009] Advantageous configurations for implementing the invention are set forth in the dependent claims.

[0010]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings.

The ignition device 11 for an internal combustion engine, which is partially shown in FIGS. 1 and 3, particularly a multi-linder internal combustion engine, has an ignition coil 12 for each cylinder. The ignition device 11 is adapted to be mounted on a cylinder head of an internal combustion engine in a known manner, not shown. A so-called spark plug hole is provided in each cylinder head for each cylinder. In each of these spark plug holes, a spark plug is inserted into a fixed position by sinking, and a connection pin of this spark plug is used for contact connection with a correspondingly arranged ignition coil 12. Facing the entrance opening.

Each ignition coil 12 is formed as a rod-shaped ignition coil and is adapted to be introduced into a correspondingly arranged ignition plug hole. A substantially rotationally symmetrical part, the ignition coil 12 has an elongated cylindrical core 14 of magnetizable material arranged coaxially with a longitudinal axis 13. Are surrounded by a primary winding 16 that is electrically insulated to conduct a low voltage, and a secondary winding 17 that conducts a high voltage at a radial distance from the primary winding 16. Alternatively, the secondary winding 17 may be arranged on the inside and the primary winding 16 on the outside.

The ignition coil 12 radially terminates in a plastic tubular casing 18, which has at its end a high-pressure terminal 19, corresponding to a spark plug. The high-voltage terminal 19 has a dome 21, a protective cover 22, an electrode 23, and a contact spring 24, respectively.

The dome 21 is a plastic part which is integral with the casing 18 and is coaxially arranged with respect to the longitudinal axis 13, which is basically sleeve-shaped and which is alternatively separate from the casing 18. May be a plastic part. The dome 21 surrounds the cup-shaped portion of the electrode 23, and a contact spring 24 is conductively supported on the cup-shaped portion of the electrode 23. The contact spring 24 is formed as a substantially circularly bent leaf spring. Have been. A pin 27 extends from the bottom 26 of the cup-shaped portion of the electrode 23 as a part of the electrode 23 in alignment with the longitudinal axis 13 and toward the core 14.

A wire-shaped noise suppression resistor 31 is attached to the insulating support 29. The insulating support 29 has a central hub 34 connected to a flat circle 33 via spokes 32 in the case of the first embodiment shown in FIGS. Thereby, the insulating support 29 is fixed to the pin 27. The noise suppression resistor 31 is formed in a circle 33 as a winding. One end of the noise suppression resistor 31 is electrically connected to the end of the secondary winding 17, and the other end is electrically connected to the pin 27.

In the case of the second embodiment shown in FIGS. 3 and 4, the insulating support 29 is formed as a ring 35 and, except for the small end section 36, is wound with a wire-shaped noise suppression resistor 31. It is attached. The end section 36 is limited by two contact pieces 37 to which the ends of the noise suppression resistor 31 are conductively connected.

The insulating support 29 is pressed onto the exposed collar 38 of the secondary coil frame 39 supporting the secondary winding 17. One contact piece 37 is connected to the end of the secondary winding 17, and the other contact piece 37 is connected to a contact thin plate 28, which is electrically connected to the pin 27 by a clamp connection. Connected.

Alternatively, the noise suppression resistor 31 wound in a cylindrical shape may be formed in a spiral shape, and a diode for suppressing a spark generated at the time of cutoff is connected in series to the noise suppression resistor 31. It may be fixed to the insulating support 29.

The configuration of the noise suppression resistor 31, which is oriented transversely to the longitudinal axis 13 and is flat, makes it possible to shorten the ignition coil 12, and to shorten the ignition coil 12. By doing so, the configuration volume of the ignition device 11 can be kept small, and the ignition device 11 can be used in a narrow assembled state.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment.

FIG. 2 is a plan view of the insulating support of the first embodiment.

FIG. 3 is a longitudinal sectional view of a second embodiment.

FIG. 4 is a perspective view of an insulating support according to a second embodiment.

[Explanation of symbols]

11 ignition device, 12 ignition coil, 13 longitudinal axis, 14 core, 16 primary winding, 17
Secondary winding, 18 casing, 19 high-voltage terminal, 21 dome, 22 protective cover, 23
Electrodes, 24 contact springs, 26 bottom, 27
Pin, 28 contact thin plate, 29 insulating support,
31 noise suppression resistor, 32 spokes, 33
Circle, 34 hub, 35 ring, 36 end section, 37 contact piece, 38 collar, 3
9 Secondary coil frame

Claims (4)

[Utility model registration claims] An ignition device for an internal combustion engine, wherein at least one ignition coil (12) is provided,
The ignition coil (12) is adapted to directly contact and connect to an ignition plug of an internal combustion engine, and a high-voltage terminal (19) of the ignition coil (12) is provided. A noise suppression resistor (31) for the indirect connection of the ignition coil (12) is formed as a rod-shaped ignition coil with a central longitudinal axis (13), The noise suppression resistor (31) can be inserted into the hole for the ignition plug of the cylinder head, and forms a part of the ignition coil (12) which is arranged substantially transversely to the longitudinal axis (13). An ignition device for an internal combustion engine, characterized in that: 2. The noise-suppressing resistor (31) has a wire winding as an insulating support (29) for the high-voltage terminal (19).
The ignition device according to claim 1, wherein the ignition device is formed. 3. The insulating support (29) has a flattened circle (33), the circle (33) being a central hub for supporting the insulating support (29) by means of spokes (32). 3. The ignition device according to claim 2, wherein the ignition device is connected to a ring (34) and the noise suppression resistor (31) is configured as a winding in a circle (33). 4. The insulating support (29) is formed as a ring (35), said ring (35) being insertable on a secondary coil support (39) and providing a noise suppression resistor (3).
1) is configured as a winding in the ring (35),
The ignition device according to claim 2.