JP4089213B2 - Water-cooled oil cooler device for vehicle engine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water-cooled oil cooler device for a vehicle engine.
[0002]
[Prior art]
Conventionally, when the temperature of the engine lubricating oil rises excessively, it is not preferable in terms of engine reliability. Therefore, a water-cooled oil cooler that cools the lubricating oil with engine cooling water has been provided.
[0003]
For example, Japanese Utility Model Publication No. 63-20819 provides a heating cooling water passage for supplying cooling water discharged from the rear of the engine body to a heating heater, and a water-cooled oil cooler is provided in the middle of the heating cooling water passage. Disposition is disclosed.
[0004]
According to such a prior art, the cooling water passage for supplying the cooling water to the water-cooled oil cooler can be shared by the heating cooling water passage.
[0005]
By the way, when the cooling water passage for the water-cooled oil cooler shown in the prior art is applied to a horizontally placed engine, there are the following problems.
(1) The water-cooled oil cooler is normally attached integrally with the oil filter, and the oil filter is disposed on the front side of the vehicle for maintenance, and therefore has a cooling water passage for heating that extends to the rear side of the vehicle. Is located on the opposite side, and the piping becomes long, and there is a problem that it becomes difficult to use the cooling water passage for heating as in the prior art.
(2) In a horizontally mounted engine in which the exhaust system is arranged on the front side of the vehicle, the oil manifold (water-cooled oil cooler) attached to the cylinder block interferes with the exhaust manifold that hangs down from the cylinder head toward the cylinder block. There is a problem that the position of is limited.
(3) In a horizontally mounted engine in which the exhaust system is disposed on the front side of the vehicle, the cooling water supply pipe for supplying cooling water to the oil filter (water-cooled oil cooler) is close to the exhaust manifold. There is a problem with the heat resistance.
[0006]
By the way, in recent years, regulations on exhaust gas components discharged from engines have become more stringent due to environmental concerns.
[0007]
Therefore, as one of the measures for such regulation, an intake system is disposed on the front side of the vehicle and an exhaust system to which a catalyst is connected is disposed on the rear side of the vehicle.
[0008]
According to such an arrangement, since the cooling of the catalyst is suppressed, the catalyst can be quickly raised to an activation temperature at which the exhaust gas can be purified after starting, and the exhaust gas purification performance can be improved. .
[0009]
Further, since the oil filter (water-cooled oil cooler) and the exhaust manifold are arranged apart from each other, the above problems (2) and (3) can be solved.
[0010]
[Problems to be solved by the invention]
However, there is still a problem that the above problem (1) cannot be solved even with a horizontally mounted engine in which the exhaust system is arranged at the rear of the vehicle as described above.
[0011]
In addition, with respect to the above-mentioned problem (1), simply adding a cooling water passage dedicated to the water-cooled oil cooler has a problem that the cost increases and the passage piping becomes complicated.
[0012]
The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a water-cooled vehicle engine that can supply cooling water to a water-cooled oil cooler without increasing costs or complicating passage piping. The object is to provide an oil cooler device.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides the following solution as a solution. That is, in the first configuration of the present invention,
A water pump for supplying cooling water into the engine body is disposed on the front side of the engine body, the cooling water discharge of the cooling water supplied from the water pump is formed on the rear side of the engine body is discharged out of the engine body an outlet, the water-cooled oil cooler device for a vehicle engine equipped with a water-cooled oil cooler for performing heat exchange with the lubricating oil discharged cooling water and the engine from the cooling water outlet, the water cooling the oil cooler, the air intake system The engine is disposed on the intake side of the engine body where the components are disposed, and the engine is disposed horizontally in the engine room so that the front-rear direction thereof coincides with the vehicle width direction, and the engine is disposed on the vehicle front side. The exhaust system of the engine is arranged on the rear side of the vehicle, and the cooling water flows from the cooling water discharge port to the radiator and the thermostat in this order. A first cooling water passage that flows back to the suction side of the water pump, a second cooling water passage that flows the cooling water from the cooling water discharge port to the heater for heating and returns to the suction side of the water pump, and cooling water A third in parallel with the second cooling water passage that does not flow to the thermostat but always flows in the order of the throttle body as the intake system component from the cooling water discharge port and the water-cooled oil cooler and returns to the suction side of the water pump. A cooling water passage is further provided .
[0014]
Generally, cooling water is supplied to intake system components of an engine. For example, in the case of a throttle valve, cooling water is supplied to prevent freezing of the throttle valve. In the case of an electromagnetic control valve for adjusting the idle speed, the coil temperature of the control valve is kept constant. Cooling water is supplied to improve the adjustment accuracy of the air amount.
[0015]
According to the first configuration of the present invention, the water-cooled oil cooler is disposed on the intake side where the intake system parts to which the cooling water is supplied are disposed, and the cooling water passage for supplying the cooling water to the intake system parts is provided with the water-cooled oil cooler. Since the cooling water passage is provided so as to pass through the cooling water passage, the cooling water passage for the water cooling oil cooler can also be used as the cooling water passage for the intake system parts, so that the piping of the cooling water passage can be simplified.
[0016]
Here, as a request before the warm-up of the engine is completed, there is a request that the intake system component (throttle valve) be warmed as much as possible in order to prevent freezing. In addition, there is a demand for lubricating oil to be heated as much as possible in order to reduce viscosity and reduce engine resistance.
[0017]
Further, as a request after completion of warm-up, there is a request that the lubricating oil should be sufficiently cooled in a water-cooled oil cooler.
[0018]
By the way, regarding the relationship between the cooling water temperature and the lubricating oil temperature, the cooling water temperature is generally higher than the lubricating oil temperature before the engine warm-up is completed, and the lubricating oil temperature becomes higher when the warm-up is completed. (For example, refer to Japanese Utility Model Publication No. 63-20819)
According to the first configuration, since the cooling water is first supplied to the intake system components before the warm-up is completed, the intake system components are supplied with relatively high temperature cooling water. As the cooling water temperature is higher than the lubricating oil, the temperature of the lubricating oil can be increased by heat exchange in the water-cooled oil cooler, the viscosity of the lubricating oil can be reduced, and the engine resistance can be reduced. .
[0019]
In addition, after the warm-up is completed, the cooling water is dissipated in the intake system parts, so that cooling water having a relatively low temperature is supplied to the water-cooled oil cooler, so that the cooling performance of the lubricating oil in the water-cooled oil cooler can be improved. .
[0020]
Further, in the second configuration of the present invention, the upper Symbol cooled oil cooler is integrated with the oil filter are configured to be disposed on the front side of the vehicle.
[0021]
According to the second configuration of the present invention, since the water-cooled oil cooler is integrated with the oil filter and disposed on the intake side in front of the vehicle, the cooling water passage for the water-cooled oil cooler is used as the cooling water passage for the intake system components. Therefore, the piping for the cooling water passage can be simplified.
[0022]
Further, since the water-cooled oil cooler and the oil filter are arranged on the intake side, it is possible to prevent interference with the exhaust pipe and to secure the heat resistance of the cooling water passage.
[0023]
Further, since the water-cooled oil cooler and the oil filter are arranged on the front side of the vehicle, the maintainability can be improved.
[0024]
In the third configuration of the present invention, the throttle body, it is then so that configuration is disposed in the vicinity of the cooling water discharge port at the rear side of the engine body.
[0025]
【The invention's effect】
According to the present invention, it is possible to supply cooling water to a water-cooled oil cooler without increasing costs or complicating passage piping.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0027]
As shown in a front view 1 showing the engine viewed from the front side of the vehicle and a side view 2 showing the engine viewed from the side of the vehicle, the engine 1 has an intake system 2 disposed on the front side of the vehicle, The exhaust system 3 is mounted horizontally in the engine room 4 of the vehicle so that the exhaust system 3 is arranged on the vehicle rear side.
[0028]
The intake system 2 includes an air cleaner 5, an intake duct 6, a throttle body 7 (not shown) provided with a throttle valve, a surge tank 8, and an intake branch pipe 9 connected to each cylinder. Connected sequentially.
[0029]
The exhaust system 3 includes an exhaust manifold 11 having one end connected to the cylinder head 10 and a catalyst 12 connected to the other end of the exhaust manifold 11, which are arranged on the lower side of the dash panel 13. .
[0030]
A cylinder block 14 is disposed below the cylinder head 10, and an oil pan 15 is disposed below the cylinder block 14.
[0031]
The engine main body described in the claims is the cylinder head 10 and the cylinder block 14.
[0032]
A water-cooled oil cooler 16 and an oil filter 17 are integrally attached to the cylinder block 14.
[0033]
The water-cooled oil cooler 16 is provided with a cooling water passage 18 for supplying engine cooling water, as shown in an enlarged view of FIG.
[0034]
In FIG. 3, the oil filter 17 is changed from a normal cartridge type to an eco filter (a filter that can replace only the filter) as compared to FIGS.
[0035]
The cooling water passage 18 connects a cooling water discharge port 10 a formed in the cylinder head 10 on the rear side of the engine 1 and the throttle body 7, and a first passage 18 a connecting the throttle body 7 and the water cooling oil cooler 16. 2 passage 18b, and water cooling oil cooler 16 and 3rd passage 18c which connects the suction side of the water pump (illustration omitted) arranged near thermostat 19 ahead of engine 1 are constituted.
[0036]
In addition, 20 is an alternator, 21 is an air compressor, and 22 is a starter.
[0037]
Next, the flow of the cooling water will be described based on the schematic diagram 4 schematically showing the flow of the cooling water.
[0038]
There are three flows of cooling water, which will be described in order below.
[0039]
First, the first path is a cooling water path for cooling the engine body, and the cooling water pumped from the water pump 23 is supplied to the cylinder block 14 and the cylinder head 10, and then the rear of the cylinder head 10. This is a path that is returned from the cooling water discharge port 10 a to the suction side of the water pump 23 via the radiator 24 and the thermostat 19.
[0040]
Next, the second path is a cooling water path to the heater for heating, and the cooling water pumped from the water pump 23 is supplied to the cylinder block 14 and the cylinder head 10 and then heated from the rear of the cylinder head 10. This path is supplied to the heater 25 and then returned to the suction side of the water pump 23.
[0041]
The third path is a cooling water path related to the present invention. The cooling water pumped from the water pump 23 is supplied to the cylinder block 14 and the cylinder head 10 and then the cooling water discharge port behind the cylinder head 10. 10a is supplied to the throttle body 7 through the first passage 18a, then supplied to the water-cooled oil cooler 16 through the second passage 18b, and returned to the suction side of the water pump 23 through the third passage 18c. Is done.
[0042]
As described above, according to the embodiment of the present invention, the water cooling oil cooler 16 is disposed on the intake side, and the cooling water passage 18 supplied to the throttle body 7 is provided so as to also pass through the water cooling oil cooler 16. The cooling water passage 18 for the water cooling oil cooler 16 can also be used as the cooling water passage 18 for the throttle body, and the piping of the cooling water passage can be simplified.
[0043]
Further, since the water-cooled oil cooler 16 is disposed on the intake side, it is possible to prevent interference with the exhaust system 3 and to secure the heat resistance of the cooling water passage 18.
[0044]
Moreover, since the oil filter 17 integrated with the water-cooled oil cooler 16 is disposed on the vehicle front side, its maintainability can be improved.
[0045]
The cooling water passage 18 is configured to be supplied to the water-cooled oil cooler 16 after the cooling water is supplied to the throttle body 7.
[0046]
Therefore, before the warm-up is completed, the cooling water having a relatively high temperature is supplied to the throttle body 7, so that the freezing of the throttle valve disposed in the throttle body 7 can be prevented and the cooling water in the water-cooled oil cooler 16 can be prevented. By exchanging heat with the lubricating oil, the lubricating oil temperature can be raised, the viscosity of the lubricating oil can be lowered, and the engine resistance can be reduced.
[0047]
In addition, after the warm-up is completed, the cooling water is radiated in the throttle body 7 and then supplied to the water-cooled oil cooler 16, so that the cooling performance of the lubricating oil in the water-cooled oil cooler 16 can be improved.
[0048]
In the present embodiment, an example is shown in which the throttle body 7 is applied as an intake system component. However, the intake system component is disposed in a bypass passage that bypasses the throttle valve, and is adjusted by adjusting the amount of intake air that passes through the bypass passage. You may make it apply to the temperature control valve etc. which are arrange | positioned in the said bypass passage similarly to the electromagnetic control valve for adjusting rotation speed, and adjust the amount of intake air which passes a bypass passage by thermowax.
[Brief description of the drawings]
FIG. 1 is a front view of an engine as viewed from the front of a vehicle.
FIG. 2 is a side view of the engine as viewed from the side.
FIG. 3 is an enlarged view in which a main part of FIG. 1 is enlarged.
FIG. 4 is a schematic diagram schematically showing the flow of cooling water.
[Explanation of symbols]
1: Engine 2: Intake system 3: Exhaust system 7: Throttle body (intake system parts)
10: Cylinder head 11: Exhaust manifold 14: Cylinder block 16: Water cooling oil cooler 17: Oil filter 18: Cooling water passage

Claims (3)

A water pump for supplying cooling water into the engine body is disposed on the front side of the engine body, the cooling water discharge of the cooling water supplied from the water pump is formed on the rear side of the engine body is discharged out of the engine body In a water-cooled oil cooler device for a vehicle engine comprising an outlet and a water-cooled oil cooler that performs heat exchange between the cooling water discharged from the cooling water discharge port and the lubricating oil of the engine ,
The water-cooled oil cooler is arranged on the intake side of the engine body where the intake system parts are arranged ,
The engine is horizontally placed in the engine room so that the front-rear direction thereof coincides with the vehicle width direction, the engine intake system on the vehicle front side, and the engine exhaust system on the vehicle rear side. Has been placed,
A first cooling water passage for flowing cooling water from the cooling water discharge port in the order of a radiator and a thermostat and returning the cooling water to the suction side of the water pump;
A second cooling water passage for flowing cooling water from the cooling water discharge port to the heater for heating and returning it to the suction side of the water pump;
Parallel to the second cooling water passage, which does not flow cooling water through the thermostat, but always flows in the order of the throttle body as the intake system component from the cooling water discharge port and the water cooling oil cooler and returns to the suction side of the water pump. A water- cooled oil cooler device for a vehicle engine, further comprising a third cooling water passage . Upper Symbol cooled oil cooler is water-cooled oil cooler device for a vehicular engine according to claim 1, wherein the integrated with oil filter arranged on the front side of the vehicle. The water-cooled oil cooler device for a vehicle engine according to claim 1, wherein the throttle body is disposed in the vicinity of the cooling water discharge port on the rear side of the engine body .

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