JP3807532B2 - Engine cooling piping structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine cooling piping structure, and more particularly to an engine cooling piping structure provided with a cooling water pipe member provided between an engine and a radiator.
[0002]
[Prior art]
In a vehicle engine, a cooling device including a radiator is provided in order to cool the heated cooling water. And between the engine and the radiator, as the cooling water pipe member, the inlet pipe member for guiding the heated cooling water from the cylinder head of the engine to the radiator and the cooling water cooled by the radiator are supplied to the cylinder block of the engine. An outlet pipe member is provided.
[0003]
Such cooling devices are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 9-1000071, No. 7-52330, and No. 8-48159. Japanese Patent Application Laid-Open No. 9-100718 discloses a horizontal engine in which an additional fan is disposed on the engine side where a compressor and an alternator of an air conditioner are disposed, thereby suppressing the influence of heat dissipation. In Japanese Utility Model Publication No. 7-52330, a cooling water pipe member on the lower side of the engine is formed in a part of the timing belt cover, and the inner space of the timing belt cover is cooled. JP-A-8-48159 discloses a protector for a cooling water pipe member by providing a protector between the cooling water pipe member and a fan belt.
[0004]
[Problems to be solved by the invention]
By the way, when a transmission and a radiator are arranged on one side of an engine and an outlet pipe member as a cooling water pipe member is laid out from the transmission-side radiator, transmission is performed manually or automatically. Since the shapes of these are different from each other, it is necessary to prepare a plurality of outlet pipe members in accordance with the shapes of these various transmissions, which is complicated and expensive.
[0005]
In order to solve this problem, it is conceivable to extend the outlet pipe member connected to the radiator from the vicinity of the lower drive shaft to the upper side of the engine. However, the outlet pipe member interferes with the drive shaft, and the outlet pipe member As a result, the outlet pipe member is laid out in the vicinity of the drive shaft, and therefore, the radiator and the engine cannot be integrated into the vehicle.
[0006]
[Means for Solving the Problems]
Therefore, in order to eliminate the above-mentioned inconveniences, the present invention provides a transmission on one side of the engine and a timing chain cover on the other side of the engine. The timing chain cover is coaxial with the crankshaft. A crank pulley is disposed, a water pump pulley and an oil tanner pulley driven by a belt wound around the crank pulley are disposed, and a radiator for cooling the engine coolant is disposed in front of the engine. Attach one end of the intake manifold to the cylinder head, extend the intake manifold upward, and place the other end of the intake manifold at the height of the upper part of the engine. The drive shaft is arranged at the height of the part to be attached to the cooling water cooled by the radiator In the engine cooling piping structure guided to the cylinder block through an outlet pipe member, the outlet pipe member is a portion where the oil pan is attached to the cylinder block on a hose member connected to the radiator on the other side of the engine Are connected to each other at the height of the crank pulley and extend from the lower side of the crank pulley to the rear side of the crank pulley, and then upward from the rear side of the crank pulley along the rear end of the timing chain cover outside the belt. Extending between the alternator pulley and the water pump pulley, extending above the alternator pulley and the water pump pulley, and then disposed between the intake manifold and the rear surface of the engine. Bent down below the throttle body, the water pon It characterized in that at substantially the same height as the pulley is connected to the inlet cap provided in the cylinder block of the rear side of the engine.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, since the cooling water pipe member is extended upward along the engine so as to surround the engine accessory from below, it is not necessary to provide the cooling water pipe member on the transmission side. Multiple cooling water pipe members are not required for the transmission, the number of cooling water pipe members is reduced by making the cooling water pipe members common, and the cooling water pipe members are damaged. In addition, the engine and the radiator can be integrally mounted on the vehicle, reducing the number of assembling steps, reducing the work time, and the radiator. This is possible regardless of the installation position, and the degree of freedom of the radiator mounting position can be increased.
[0008]
【Example】
Embodiments of the present invention will be described in detail and specifically with reference to the drawings. 1 to 3 show a first embodiment of the present invention. 1 and 2, 2 is an engine mounted on a vehicle (not shown), 4 is a cylinder block, 6 is a cylinder head, 8 is an air cleaner, 10 is an oil pan, and 12 is a drive shaft.
[0009]
A transmission 14 is connected to the engine 2 on one side.
[0010]
The drive shaft 12 is disposed at a height of a portion where the oil pan 10 is attached to the cylinder block 4.
[0011]
The engine 2 is provided with a water pump 16 and an alternator 18 on the other side opposite to the transmission 4. The water pump 16 and the alternator 18 are driven by a belt 28 wound around a crank pulley 22, a water pump pulley 24 and an alternator pulley 26 of the crankshaft 20.
[0012]
One end side of an intake manifold 30 extending upward is attached to the cylinder head 6. The other end of the intake manifold 30 is disposed at the height of the upper part of the engine 2. A throttle body 32 is attached to the other end side of the intake manifold 30.
[0013]
In addition, a radiator 4 of a cooling device is provided on the other side of the engine 2.
[0014]
The radiator 34 is connected to an outlet pipe member 36 which is one of cooling water pipe members.
[0015]
One end side of the outlet pipe member 36 is connected to the radiator 34 and extends along the other side of the cylinder block 4 of the engine 2 so as to surround the engine accessory such as the alternator 18 from the lower side of the timing chain cover 48 that covers the timing chain and the like. The other end is bent and connected to the cylinder block 4 via the inlet cap 38.
[0016]
In addition, a throttle water hose 40 as a connecting pipe member continuous in the throttle body 32 is connected to the outlet pipe member 36 so as to be directed upward at a bent uppermost portion 36a on the other end side.
[0017]
As shown in FIG. 3, the outlet pipe member 36 is connected to the radiator 34 via a flexible hose 34 a and extends to the height of the alternator 18. The outlet pipe member 36 is connected to the outlet pipe 42. And an outlet hose 44 connected to the inlet cap 38. Further, the outlet hose 44 is divided into first and second hose materials 44-1 and 44-2 as a divided pipe material at a portion to which the throttle water hose 40 is connected.
[0018]
The first and second hose materials 44-1 and 44-2 and the throttle water hose 40 are connected by a three-way connecting pipe member 46. The three-way connecting pipe member 46 connects the throttle water hose 40 to the first connecting portion 46a that connects the first hose material 44-1, the second connecting portion 46b that connects the second hose material 44-2. And a third connecting portion 40c.
[0019]
Next, the operation of the first embodiment will be described.
[0020]
Cooled cooling water (shown by arrows in FIGS. 1 and 2) from the radiator 34 is guided from the inlet cap 38 to the cylinder block 4 through the outlet pipe 42 and the outlet hose 44.
[0021]
By the way, in the first embodiment, the outlet pipe member 36 connected to the radiator 34 is disposed upward along the other side of the engine 2 so as to surround the alternator 18 which is an engine accessory from below. Since there is no need to provide the outlet pipe member 36 on the transmission 14 side, a plurality of pipe members are not required for transmissions of different shapes, the outlet pipe members 36 are made common, and the number of outlet pipe members 36 is reduced. Can be cheaper.
[0022]
Further, since the outlet pipe member 36 does not extend from the vicinity of the drive shaft 12, the outlet pipe member 36 does not interfere with the drive shaft 12, and the possibility that the outlet pipe member 36 is damaged can be avoided. .
[0023]
Furthermore, since the outlet pipe member 36 is not provided in the vicinity of the drive shaft 12 in this manner, the engine 2 and the radiator 34 can be mounted on the vehicle as one body, reducing the number of assembly steps, The work time can be shortened.
[0024]
In addition, air stays in the bent uppermost portion 36a of the outlet pipe member 36, and an air lock is caused in this portion, so that it is difficult to supply cooling water to the cylinder block 4 side. Since the directional throttle water hose 40 is connected, the air can be released to the throttle body 32 side, air lock is prevented from being generated in the outlet pipe member 36, and the cooling water is smoothly supplied to the cylinder block 4. Can be supplied.
[0025]
Furthermore, not only the installation position of the conventional radiator but also the case where the radiator 34 is installed in another position can be dealt with, and the degree of freedom of the mounting position of the radiator 34 can be increased.
[0026]
FIG. 4 shows a second embodiment of the present invention.
[0027]
This second embodiment is characterized by the following points (SG1). In other words, in the three-way connecting tube member 102, the first connecting portion 102a and the second connecting portion 102b are formed in a mountain shape at an angle α, and the upper portions of the first and second connecting portions 102a and 102b are formed. Is formed with a bulging portion 106 so as to form an air space 104 above, and the bulging portion 106 is provided with a third connection portion 102c.
[0028]
According to the configuration of the second embodiment, the air in the outlet pipe member 36 is positively guided to the uppermost air space 104, and the air in the air space 104 is easily discharged to the throttle body 32 side. Therefore, the occurrence of air lock can be effectively prevented.
[0029]
【The invention's effect】
As is clear from the above detailed description, according to the present invention, the cooling water pipe member is connected to the radiator at one end and is disposed upward along the other side of the engine so as to surround the engine accessory from below. by the end side bent Ru is connected to the cylinder block of the engine, different since the cooling water pipe member in the form need not be provided on the transmission side, and unnecessary a plurality of cooling water pipe member for transmission, cooling It is possible to reduce the number of cooling water pipe members by reducing the number of cooling water pipe members and to avoid the risk of damage to the cooling water pipe member. Furthermore, the engine and the radiator are integrated. It can be mounted on a vehicle, reducing the assembly man-hours, shortening the work time, and increasing the freedom of placing the radiator. Get.
[Brief description of the drawings]
FIG. 1 is a front view of an engine.
FIG. 2 is a side view of the engine of FIG.
FIG. 3 is a configuration diagram of an outlet pipe member.
FIG. 4 is a three-way connecting pipe member in a second embodiment.
[Explanation of symbols]
2 Engine 4 Cylinder block 18 Alternator 32 Throttle body 36 Outlet pipe member 40 Throttle water pipe 46 Three-way connecting pipe member

Claims (3)

A transmission is arranged on one side of the engine , a timing chain cover is provided on the other side of the engine, a crank pulley is arranged coaxially with the crankshaft on the timing chain cover, and is wound around the crank pulley. A water pump pulley driven by a belt and an oil tanner pulley are arranged, a radiator for cooling the cooling water of the engine is arranged in front of the engine, and one end side of an intake manifold is attached to the cylinder head. The intake manifold is extended upward, the other end of the intake manifold is disposed at the height of the upper part of the engine, and the drive shaft is disposed at the height of the part where the oil pan is attached to the cylinder block. Cooling water cooled by the radiator is guided to the cylinder block through an outlet pipe member. In the engine cooling piping structure, the outlet pipe member is connected to a hose member connected to the radiator on the other side of the engine at a height of a portion where the oil pan is attached to the cylinder block, and After extending from the lower side of the pulley to the rear side of the crank pulley, and extending upward from the rear side of the crank pulley along the rear end of the timing chain cover outside the belt, the alternator pulley and the water After passing between the pump pulley and extending above the alternator pulley and the water pump pulley, it is bent downward below the throttle body disposed between the intake manifold and the rear surface of the engine. And the rear side of the engine at the same height as the water pump pulley. Cooling pipe structure for an engine, characterized in that connected to the inlet cap provided in da block. 2. The outlet pipe member is bent downward at the highest position of the outlet pipe member, and a connecting pipe member communicating with the inside of the throttle body is connected to the highest portion of the outlet pipe member. The engine cooling piping structure described in 1. The outlet tube member, cooling piping structure for an engine according to claim 1, characterized in that it is extending up and down in the longitudinal direction between the timing chain cover and the intake manifold.

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