JP2748519B2 - Internal combustion engine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine, and more particularly, to an internal combustion engine in which various auxiliary parts are provided in an engine body.

2. Description of the Related Art In an internal combustion engine of a vehicle, an engine main body, for example, a cylinder head is provided with a fuel system auxiliary component such as a fuel pump, an ignition system auxiliary component such as a distributor, a cooling system auxiliary component such as a thermostat, and an oil. Lubrication system auxiliary parts such as pumps are provided.

As a configuration for attaching these accessory parts to the cylinder head, for example, as shown in FIG.
A distributor 104, which is operated by rotation of a camshaft disposed in 2, is mounted on one side of the cylinder head 102 by a distributor case 106, and a mechanical fuel pump 108, which is operated by rotation of eight camshafts, is mounted on the distributor case 106. Further, an intake manifold 110 is attached to the other side surface of the cylinder head 108, and the intake manifold 110 is provided with a thermostat 112 having a thermostat (not shown).
Is attached.

In addition, as shown in FIG.
The distributor 104 is attached by the distributor case 106. At this time, the distributor 104 is fixed to the distributor case 106 by joining and fixing the disc case side flange portion 116 and the disc body side flange portion 118. Further, a thermo cap 112 is attached to the cylinder head 102 by a thermo case 114.

[Problems to be solved by the invention]

However, conventionally, in the configuration shown in FIG. 4, since the distributor case 106 is directly attached to the cylinder head 102, it is easy to receive high-temperature engine heat from the cylinder head 102, and the distributor case 106 becomes hot. , This engine heat is distributor 10
4 and the fuel pump 108 to adversely affect these components, causing a deterioration in the functions of the distributor 104 and the fuel pump 108, resulting in inconvenience of reduced durability. In addition, the shape of the intake manifold 110 of the cylinder head 102 tends to be complicated, and furthermore, when the engine room is small, the layout is difficult to handle and the temperature is high. Furthermore, since components such as the thermocap 112 and the heater nipple are installed in the intake manifold 110, the cooling water hose is likely to concentrate, and water leaks and the like are likely to occur.

Further, in the configuration shown in FIG. 5, the distributor 104 is merely attached to the cylinder head 102 by the distributor case 106 as described above.
The inconvenience that the function of the distributor 104 is deteriorated by the engine heat from the cylinder head 102 is caused.
Further, since the distributor case 106 and the thermo case 114 are separately attached to the cylinder head 102, the number of parts is increased, the assembling efficiency is reduced, and the parts management is downside, and the cost is high. There was an inconvenience. Further, since the thermo case 114 is sandwiched between the gaskets, the fan switch 120 is attached to the thermo case 114.
In this case, the grounding cannot be performed, and components such as the power supply plate 122 are required, so that the number of components is increased and the configuration is complicated.

[Object of the invention]

Therefore, an object of the present invention is to eliminate the above-mentioned disadvantages, by integrating the cooling system auxiliary parts and other system auxiliary parts, and by guiding the engine cooling water to the outside, the engine cooling water is used. To prevent the deterioration of the function of auxiliary parts by cooling the auxiliary parts of other systems, to improve the assembly efficiency by reducing the number of parts, and to realize an internal combustion engine that is advantageous in layout and can be inexpensive. is there.

[Means for solving the problem]

In order to achieve this object, the present invention provides an internal combustion engine in which auxiliary parts are provided in an engine body provided with an engine-side cooling water passage through which engine cooling water flows, and an auxiliary equipment mounting case for mounting the auxiliary parts. It is provided on the side of the engine body, and a thermostat part provided with a thermostat is integrally provided on the accessory mounting case, and is opened on the mounting surface on the engine body side so as to communicate with the engine side cooling water passage. A case-side cooling water passage through which the engine cooling water flows is formed in the thermo case.

[Action]

According to the configuration of the present invention, since the accessory parts are cooled by the engine cooling water flowing in the case-side cooling water passage formed in the accessory attachment case, the temperature rise of the accessory parts due to the engine heat is prevented, As a result, it is possible to prevent the function of the accessory parts from deteriorating and improve the durability. In addition, a thermo case part is integrally provided in the accessory mounting case and a case side cooling water passage is formed, so the number of parts is reduced, the assembly efficiency is improved, the cost is reduced, and the parts management is reduced. It is possible to achieve simplification, further increase the degree of freedom of the layout of the internal combustion engine, and achieve efficient layout design of the internal combustion engine even in a vehicle with a narrow engine room.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

1 to 3 show an embodiment of the present invention.
In the figure, reference numeral 2 denotes an internal combustion engine comprising a cylinder head 4 as an engine body and a cylinder block (not shown). On one side surface 4a of the cylinder head 4, a distributor case 8, which is an accessory mounting case for mounting a distributor 6, which is an ignition auxiliary component, is attached. The distributor 6 is operated by rotation of a cam shaft (not shown) provided on the cylinder head 4.

The distributor 6 is fixed to the distributor case 8 by joining and fixing the flange 10 on the main body side and the flange 12 on the case side.

Further, the distributor case 8 includes a thermo case section 16 provided with a thermo cap 14 having a thermostat (not shown) as a cooling system auxiliary part, and another auxiliary part for a fuel pump 18 as a fuel system auxiliary part. The pump case section 20 which is a machine mounting case is mounted. This fuel pump 18
It operates mechanically and, like the distributor 6, operates by rotation of a cam shaft installed on the cylinder head 4.

As shown in FIG. 3, the distributor case 8 communicates with an engine-side cooling water passage (not shown) of the cylinder head 4 and has a case-side cooling water passage 24 for flowing the engine cooling water to a thermostat outlet 22. An engine oil passage 26 through which the lubricating oil of the internal combustion engine 2 flows is formed. One side of the engine oil passage 26 communicates with a disk body side opening 28 formed in the disk case side flange portion 12 and the other side communicates with a head side opening 32 formed in the head side flange portion 30. The case-side cooling water passage 24
As shown in FIG. 3, an opening is provided at an end surface of a head-side flange 30 which is a mounting surface on the cylinder head 4 side so as to communicate with the engine-side cooling water passage.

The case-side cooling water passage 24 is for flowing the engine cooling water from the engine-side cooling water passage of the cylinder head 4. The engine cooling water flowing in the case-side cooling water passage 24 causes the engine cooling water to flow from the cylinder head 4 side. This structure cools the distributor case 8 that is going to be heated to a high temperature by the engine heat, thereby preventing the distributor 6 and the fuel pump 18 from becoming hot, and maintaining the functions of the distributor 6 and the fuel pump 18 well.

 Next, the operation of this embodiment will be described.

During operation of the internal combustion engine 2, a camshaft installed on the cylinder head 4 rotates, and the distributor 6 and the fuel pump 18 operate with the rotation of the camshaft.

Further, the engine cooling water in the internal combustion engine 2 flows from the engine-side cooling water passage of the cylinder head 4 into the case-side cooling water passage 24 of the external distributor case 8, and positively acts on the thermo-case 16 of the cooling system. Fluid.

At this time, the distributor case 8 attached to the cylinder head 4 tends to become hot due to the engine heat from the cylinder head 4.
The engine cooling water in the case-side cooling water passage 24 cools the distributor case 8, thereby preventing the temperature of the distributor case 8 from rising. Thus, it is possible to prevent the distributor 6 and the fuel pump 18 from becoming high temperature, maintain the functions of the distributor 6 and the fuel pump 18 satisfactorily, and improve the durability.

In addition, since the distributor case 8 is provided with the thermo case 16 and the pump case 20 integrally, the number of parts is reduced, the assembling efficiency is improved, the cost is reduced, and the parts management is simplified. As a result, the degree of freedom of the layout of the internal combustion engine 2 is increased, and an efficient layout design of the internal combustion engine 2 can be achieved even in a vehicle having a narrow engine room.

〔The invention's effect〕

As apparent from the detailed description above, according to the present invention, an accessory mounting case for mounting accessory components is provided on the side surface of the engine body, and the thermostat portion from which the thermostat is obtained is integrated with the accessory mounting case. And a case-side cooling water passage that allows the engine cooling water to flow through the thermo case by opening to the mounting surface on the engine body side so that it can communicate with the engine-side cooling water passage. Cooled by the engine cooling water flowing in the case-side cooling water passage formed in the machine mounting case, it prevents the temperature rise of accessory parts due to engine heat, thereby preventing the function of the accessory parts from deteriorating, Durability can be improved. In addition, a thermo-case part of the cooling system is integrally provided in the accessory mounting case and a case-side cooling passage is formed, so that the number of parts is reduced, the efficiency of assembly is improved, and the cost is reduced.
It is possible to simplify the parts management, increase the degree of freedom of the layout of the internal combustion engine, and design an efficient layout of the internal combustion engine even in a vehicle with a narrow engine room.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a perspective view from one side of each accessory component attached to an internal combustion engine, FIG. 2 is a perspective view of a distributor case attached to the internal combustion engine, FIG. FIG. 3 is a sectional view of the distributor case. FIGS. 4 and 5 are perspective views showing a state in which auxiliary parts of an internal combustion engine are conventionally attached. In the figure, 2 is an internal combustion engine, 4 is a cylinder head, 6 is a distributor, 8 is a distributor case,
14 is a thermo cap, 18 is a fuel pump, 24 is a case side cooling water passage, and 26 is an engine oil passage.

Claims (1)

(57) [Claims] An internal combustion engine having auxiliary parts provided in an engine body having an engine-side cooling water passage through which engine cooling water flows,
An accessory mounting case for mounting the accessory component is provided on a side surface of the engine body, and the accessory mounting case is integrally provided with a thermo case portion provided with a thermostat and communicates with the engine-side cooling water passage. An internal combustion engine, wherein a case-side cooling water passage is formed in the thermo-case portion, the case-side cooling water passage being opened to a mounting surface on the engine body side.