JP2002206465A - Intake device module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device module for reducing infiltration of foreign matter into the periphery of parts of an ignition system by integrally providing a head cover capable of housing the members of the ignition system and an air cleaner with each other. SOLUTION: A head cover 10 which is to be mounted to a cylinder head and a lower case 22 of the air cleaner are made of resin and are integrally formed with each other. A stick coil 40 as a part of the ignition system is fitted between an intake cover part 12 and an exhaust cover part 13 of the head cover 10. A cover member 24 for covering the stick coil 40 can be pulled out in the direction, expressed with arrow B from an opening part 27 of the lower case 22. A filter element is provided over the lower case 22, and the cover member 24 shields foreign mattes fallen off from the filter element to reduce fall of the foreign material onto the periphery of the stick coil 40. The stick coil 40 can be easily changed by pulling out the cover member 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine (hereinafter referred to as "internal combustion engine").
An internal combustion engine is called an “engine”. )).

[0002]

2. Description of the Related Art Conventionally, a head cover is mounted above an engine cylinder head, that is, on a side on which a cam shaft for driving a valve is provided. By attaching the head cover, leakage of noise generated from a drive unit such as a camshaft and entry of foreign matter into the vicinity of the ignition system member are reduced.

[0003] In addition, the use of an intake device module in which a head cover and an air cleaner for removing foreign matter in intake air are integrally formed has been expanding. For example, Japanese Patent Publication No. 61-106
As disclosed in Japanese Patent Publication No. 65-65, there is known an engine in which a filter chamber for housing a filter element is formed above a cylinder head cover.

[0004]

[Problems to be solved by the invention] Japanese Patent Publication No. 61-1066
According to the engine disclosed in Japanese Patent Application Laid-Open No. 5 (1999) -2005, a filter chamber containing a filter element and a rocker cover containing a rocker arm are integrally formed. With these configurations, weight reduction and noise reduction are achieved.

[0005] However, according to the engine disclosed in Japanese Patent Publication No. 61-10665, for example, DOH
No consideration is given to the case where an ignition system member such as an ignition coil is attached to the head cover as in the C engine. In the above case, the rocker cover merely accommodates the rocker arm, and no consideration has been given to attaching an ignition system member such as an ignition coil to the head cover. For this reason, there is a possibility that foreign matter adhering to the filter element may fall around the ignition system member, and when exchanging the ignition system member, foreign matter may enter the cylinder of the engine.

Accordingly, an object of the present invention is to integrate a head cover capable of accommodating a member of an ignition system and an air cleaner,
It is an object of the present invention to provide an intake device module that reduces intrusion of foreign matter into the surroundings of members of an ignition system.

[0007]

According to the first aspect of the present invention, the ignition system member is attached to the head cover, and one end of the ignition system member is exposed. The air cleaner is provided so as to cover the head cover, and the head cover and the air cleaner are integrated. A cover member is provided inside the air cleaner, and the cover member covers an end of the ignition system member exposed from the head cover. Therefore, it is possible to reduce intrusion of foreign matter into the periphery of the ignition system member, for example, intrusion of liquid such as fuel or water. Therefore, it is possible to reduce the intrusion of foreign matter into the cylinder when replacing the members of the ignition system.

[0008] According to the intake device module of the second aspect of the present invention, the cover member is detachable from the air cleaner. For example, foreign matter dropped from the air cleaner accumulates on the cover member. Therefore, when exchanging the members of the ignition system, it is possible to remove foreign substances accumulated together with the cover member by removing the cover member. As a result, it is possible to reduce the intrusion of foreign matter into the periphery of the members of the ignition system.

According to the intake device module of the third aspect of the present invention, the cover member is provided between the intake system cover portion and the exhaust system cover portion which are installed in parallel with the head cover in the cylinder arrangement direction. ing. That is, the cover member is provided so as to cover an ignition system member attached between the two cover portions. Therefore, the ignition system member is covered by the cover member, and the invasion of foreign matter into the periphery of the ignition system member is reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing an embodiment of the present invention will be described with reference to the drawings. An intake device module according to one embodiment of the present invention is mounted above a cylinder head of a DOHC engine. As shown in FIG. 1 and FIG. 2, an intake device module 1 according to one embodiment of the present invention includes a head cover 10, an air cleaner 20, and a stick coil 40 which is one of ignition system members.

The head cover 10 is mounted above a cylinder head (not shown) of the engine, that is, on the side opposite to the crankshaft. The head cover 10 is assembled to the cylinder head by a plurality of bolt members 11 so as to cover a valve operating system such as a camshaft (not shown) of the engine. The head cover 10 has an intake cover 12 and an exhaust cover 13. Intake cover section 12 and exhaust cover section 1
Reference numeral 3 is provided in parallel to two camshafts provided in the engine.

The intake cover section 12 forms an intake cam chamber 12a for accommodating an intake cam for driving an intake valve (not shown), an intake camshaft, a rocker arm, and the like. The exhaust cover section 13 forms an exhaust cam chamber 13a that houses an exhaust cam for driving an exhaust valve (not shown), an exhaust camshaft, a rocker arm, and the like. A mounting section 14 to which the stick coil 40 is mounted is formed between the intake cover section 12 and the exhaust cover section 13.

The air cleaner 20 is provided on the head cover 10 on the side opposite to the cylinder head. Air cleaner 2
0 has an upper case 21, a lower case 22, a filter element 23, and a cover member 24. Upper case 2
1 and the lower case 22 form a filter chamber 20a. The upper case 21 and the lower case 22 are formed of resin. The upper case 21 is fitted in the lower case 22, and the filter element 23 is installed between the upper case 21 and the lower case 22. The filter element 23 installed in the filter chamber 20a is formed of, for example, filter paper or the like, and removes foreign substances contained in the intake air. The lower case 22 is formed of resin integrally with the head cover 10, the stick coil 40 is attached to the head cover 10, and the filter element 2 is provided between the lower case 22 and the lower case 22.
By inserting the upper case 21 with the cover 3 in between, the intake device module 1 in which the head cover 10 and the air cleaner 20 are integrated is assembled.

The upper case 21 of the air cleaner 20 has an intake outlet 25 and the lower case 22 has an intake inlet 26. An intake duct (not shown) on the dust side is connected to the intake inlet 26. A clean side intake duct (not shown) is connected to the intake outlet 25. The intake duct on the clean side is connected to a surge tank of an intake manifold (not shown). Air cleaner 20 from the intake duct on the dust side
The intake air that has flowed into the intake air flows out of the intake outlet 25 through the intake element 26 via the filter element 23. The outflowed intake air is supplied to the surge tank via the intake duct on the clean side.

The cover member 24 is provided inside the air cleaner 20. The cover member 24 is provided between the intake cover section 12 and the exhaust cover section 13 of the head cover 10 and covers the end of the stick coil 40 on the air cleaner 20 side, that is, the end on the side opposite to the cylinder head.
The cover member 24 forms a storage chamber 24 a having a substantially trapezoidal cross section so as to cover the stick coil 40. The end of the stick coil 40 is exposed inside the accommodation room 24a.

The cover member 24 is formed to extend in the direction in which the cylinders formed in the cylinder block (not shown) are arranged, that is, in the direction of arrows AB in FIG. The cover member 24 can be pulled out from the opening 27 formed in the lower case 22 in the direction of arrow B in FIG.

The stick coil 40 is an ignition coil for applying a high voltage to an ignition plug (not shown). An ignition plug is attached to the end of the stick coil 40 on the side opposite to the air cleaner 20, that is, the side opposite to the end exposed from the head cover 10. Power is supplied to the stick coil 40 from a power supply unit (not shown) to the connector 41 via a power cable (not shown).

As described above, according to the intake device module 1 according to one embodiment of the present invention, the head cover 10 and the air cleaner 20 are integrated even when the stick coil 40 is attached to the head cover 10 like a DOHC engine. Can be molded into A cover member 24 is provided inside the air cleaner 20 of the intake device module 1 that is integrally formed. The cover member 24 is connected to the opening 27 of the lower case 22 of the air cleaner 20.
Can be extracted from The cover member 24 accommodates ignition system members such as the stick coil 40 and the power cable. The cover member 24 includes the filter element 2
Block foreign substances falling from 3. Therefore, foreign substances such as dust and water contained in the intake air are reduced from entering the periphery of the stick coil 40.

Further, according to the intake device module 1 of the present embodiment, at the time of service or maintenance such as replacement of the stick coil 40, for example, foreign matter accumulated on the cover member 24 can be removed by pulling out the cover member 24. That is, at the time of service or maintenance, for example, the upper case 21 and the filter element 23 are removed, and then the cover member 24 is pulled out to reduce the intrusion of foreign matter into the vicinity of the stick coil 40. As a result, it is possible to reduce the intrusion of foreign matter falling around the stick coil 40 into the cylinder when the stick coil 40 is replaced. In addition, since a process for cleaning the periphery of the stick coil 40 is unnecessary,
Service or maintenance can be easily performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an intake device module according to an embodiment of the present invention, and is a schematic perspective view showing an integrated head cover and a lower case of an air cleaner.

FIG. 2 is a view showing an intake device module according to an embodiment of the present invention, and is a cross-sectional view taken along line II-II of FIG. 1 in a state where an upper case of an air cleaner is mounted.

[Explanation of symbols]

 Reference Signs List 1 intake device module 10 head cover 12 intake cover portion 13 exhaust cover portion 20 air cleaner 21 upper case 22 lower case 24 cover member 40 stick coil (ignition system member)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Nakayama 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Co., Ltd. (72) Inventor Kuniaki Muramatsu 1-Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Corporation F-term (reference) 3G019 KC05 KC07

Claims (3)

[Claims] 1. An intake device module mounted on a cylinder head of an internal combustion engine, comprising: a head cover attachable to the cylinder head; and a head cover attached to the head cover such that one end is exposed from the head cover. An ignition system member whose end is mounted inside the cylinder head; an air cleaner provided integrally with the head cover so as to cover the head cover on the side opposite to the cylinder head of the head cover; and an air cleaner provided inside the air cleaner. And a cover member that covers an end of the ignition system member exposed from the head cover. 2. The air conditioner according to claim 1, wherein the cover member is provided detachably from the air cleaner.
The described intake device module. 3. The head cover includes an intake system cover that accommodates an intake system drive member of the internal combustion engine, and an exhaust system cover unit that is installed in parallel with the intake system cover and accommodates an exhaust system drive member of the internal combustion engine. The cover member is provided extending between the intake system cover portion and the exhaust system cover portion in a direction in which the cylinders of the internal combustion engine are arranged, and the cylinders of the internal combustion engine are arranged. The air intake device module according to claim 2, wherein the air intake device module can be pulled out in a direction in which the air intake device extends.