JP7198790B2 - Assembly housing - Google Patents

Description

The present invention provides a pipe that guides cooling water to other equipment, a water temperature sensor that detects the temperature of the cooling water, and a gas mixed in the cooling water, for the outflow port of the cooling water in the cylinder head of the internal combustion engine. It relates to a housing for assembling a valve for isolation from water.

Internal combustion engines in vehicles, especially four-wheeled vehicles, are generally water-cooled. High-temperature cooling water flowing out from the internal combustion engine is used as a heat source for heating an air conditioner that air-conditions the interior of the vehicle. That is, the cooling water that has passed through the cylinder block and cylinder head of the internal combustion engine is guided to a heater core, which is a heat exchanger, and heat is exchanged between the cooling water and the air supplied to the vehicle interior to heat the vehicle interior. .

Also, in recent years, hybrid vehicles equipped with two power sources, an internal combustion engine and an electric motor, are becoming widespread. A series-system hybrid vehicle generates power by driving a generator with an internal combustion engine, stores the generated power in a power storage device (battery and/or capacitor), and supplies the power to an electric motor. The electric motor rotates the axle of the vehicle and, in turn, the drive wheels, so that the vehicle travels (see, for example, the following patent documents).

JP 2019-131035 A

As schematically shown in FIG. 5, the outer surface 51 of the cylinder head 5 is provided with an outlet 52 for cooling water. , a pipe 0 leading to a radiator, which is a heat exchanger for air-cooling the cooling water, is connected. In addition, a water temperature sensor 3 for detecting the temperature of cooling water inside the cylinder head 5 is also attached. In the existing internal combustion engine 6, the pipe 2 extending from the cylinder head 5 to the heater core and the lead wire (or harness) 31 for transmitting the output signal of the water temperature sensor 3 are arranged in the same direction, more specifically, in the cylinder head. It extended in the direction in which the outer surface 51 of 5 faces, in other words, in the rearward direction of the internal combustion engine 6 .

On the other hand, as schematically shown in FIG. 6, in a hybrid vehicle, in addition to the internal combustion engine 6, it is necessary to accommodate an electric motor, a generator, a PCU (Power Control Unit) 7 responsible for electric power control, etc. in an engine room (engine compartment). occurs. As shown in the figure, in a mode in which the internal combustion engine 6, the PCU 7, the ECU (Electronic Control Unit) 8, the relay box 9, and the like are arranged along the left-right direction of the vehicle, the rear-side outer surface 51 of the cylinder head 5 of the internal combustion engine 6 Since the pipe 2 and the lead wire 31 protruding from the internal combustion engine 6 and the PCU 7 may interfere with each other, it is necessary to provide a clearance C having a certain width or more between the internal combustion engine 6 and the PCU 7 .

However, in a small vehicle, there is a limit to expanding the inner volume of the engine room along the left-right direction of the vehicle, and it is difficult to secure a sufficient clearance.

In addition, it is not easy to design and develop a new internal combustion engine and PCU specialized for a specific vehicle type, including economic rationality, and there is no choice but to divert the existing internal combustion engine and PCU. . That is, it is practically difficult to reduce the outer dimensions of the internal combustion engine or PCU.

SUMMARY OF THE INVENTION It is an object of the present invention to avoid the problem that piping and lead wires extending from a cylinder head of an internal combustion engine pressurize the internal volume of an engine room.

In order to solve the above-described problems, the present invention provides a pipe that guides cooling water to other equipment, a water temperature sensor that detects the temperature of the cooling water, and a water temperature sensor that detects the temperature of the cooling water. and for assembling a valve that separates the gas mixed in the cooling water from the cooling water, communicates with the outflow port of the cylinder head, and extends substantially parallel to the outer surface where the outflow port of the cylinder head is open. and a pipe mounting portion to which the pipe is mounted, which communicates with the outflow port of the cylinder head and extends in a direction different from the direction in which the pipe mounting portion extends, substantially parallel to the outer surface where the outflow port of the cylinder head opens. A sensor mounting portion to which a water temperature sensor is mounted is communicated with the outflow port of the cylinder head and is substantially parallel to the outer surface on which the outflow port of the cylinder head is open and in a direction different from the direction in which the pipe mounting portion and the sensor mounting portion extend. and a valve mounting portion extending outward to mount the valve , and the pipe mounting portion and the sensor mounting portion extend in substantially the same plane and in directions opposite to each other .

According to the present invention, it is possible to avoid the problem that piping and lead wires extending from the cylinder head of an internal combustion engine pressurize the internal volume of the engine room of the vehicle.

1 is a side view of an assembly housing according to one embodiment of the present invention; FIG. The rear view which looked at the housing for assembly|attachment of the same embodiment from the direction of a pipe attachment part. FIG. 2 is a cross-sectional view taken along line AA of the assembly housing of the same embodiment; FIG. 4 is a plan view schematically showing the arrangement of the internal combustion engine and the PCU in the engine room of the hybrid vehicle when the assembly bracket of the embodiment is employed; FIG. 2 is a perspective view schematically showing the arrangement of a cooling water outlet and a water temperature sensor in a cylinder head of a conventional internal combustion engine; FIG. 2 is a plan view schematically showing the arrangement of a conventional internal combustion engine and a PCU in an engine room of a hybrid vehicle;

One embodiment of the present invention will be described with reference to the drawings. 1 to 3 show the structure of the assembly housing 1 of this embodiment. The assembly housing 1 includes a cooling water outlet 52 opened in the cylinder head 5 of the internal combustion engine 6, a pipe 2 for guiding the cooling water to other equipment such as a heater core, and a water temperature sensor for detecting the temperature of the cooling water. 3, and is used to assemble the air vent valve 4 that separates the gas entrained in the cooling water from the cooling water.

The assembly housing 1 includes a connecting portion 11 connected to an outlet 52 of the cylinder head 5 of the internal combustion engine 6, a pipe mounting portion 12 for mounting the pipe 2, a sensor mounting portion 13 for mounting the water temperature sensor 33, and an air vent valve. 4 and a valve mounting portion 14 for mounting 4. The connection portion 11, the pipe attachment portion 12, the sensor attachment portion 13, and the valve attachment portion 14 are tubular bodies whose interiors communicate with each other. As shown in FIG. 3 , the connecting portion 11 is joined to the rear-side outer surface 51 of the cylinder head 5 of the internal combustion engine 6 where the outflow port 52 is open.

The pipe attachment portion 12 extends substantially parallel to the rear-side outer surface 51 of the cylinder head 5 of the internal combustion engine 6 . As shown in FIG. 4, when the internal combustion engine 6 is placed horizontally in the engine room of a vehicle, the outer surface 51 on the rear side of the cylinder head 5 faces the lateral direction of the vehicle. The pipe attachment portion 12 protrudes along the longitudinal direction of the vehicle, toward the rear of the vehicle in the illustrated example.

The end of the pipe 2 is fitted onto the pipe attachment portion 12 . That is, the pipe attachment portion 12 is fitted into the end portion of the pipe 2 . The pipe 2 extends rearward of the vehicle in the illustrated example along the longitudinal direction of the vehicle. The cooling water flowing out from the outlet 52 of the cylinder head 5 flows into the assembly housing 1 through the connecting portion 11, flows from the assembly housing 1 into the pipe 2 through the pipe fitting portion 12, and flows into the pipe 2. It flows through the pipe 2 and reaches the heater core.

The sensor mounting portion 13 extends substantially parallel to the rear-side outer surface 51 of the cylinder head 5 of the internal combustion engine 6 and in a direction opposite to the extending direction of the pipe mounting portion 12 . When the internal combustion engine 6 is arranged in the engine room of the vehicle as shown in FIG. 4, the sensor mounting portion 13 protrudes forward of the vehicle in the longitudinal direction of the vehicle.

The water temperature sensor 3 is fitted inside the sensor mounting portion 13 . The water temperature sensor 3 is electrically connected to the ECU 8 via lead wires 31 . The lead wire 31 extends rearward of the vehicle in the illustrated example along the longitudinal direction of the vehicle. The cooling water that has flowed into the assembly housing 1 from the connecting portion 11 contacts the water temperature sensor 3 inside the sensor mounting portion 13 . The water temperature sensor 3 outputs a signal corresponding to the temperature of the cooling water and transmits it to the ECU 8 through the lead wire 31 .

The valve mounting portion 14 also extends substantially parallel to the rear-side outer surface 51 of the cylinder head 5 of the internal combustion engine 6 and in a direction different from the direction in which the pipe mounting portion 12 and the sensor mounting portion 13 extend. When the internal combustion engine 6 is arranged in the engine room of the vehicle as shown in FIG. 4, the sensor mounting portion 13 protrudes above the vehicle in the illustrated example along the vertical direction of the vehicle.

The air bleeding valve 4 is fitted inside the valve mounting portion 14 . The gas mixed in the cooling water that has flowed into the assembly housing 1 from the connecting portion 11 accumulates in the internal space of the air vent valve 4 via the valve mounting portion 14 . The gas separated from the cooling water is discharged outside the mounting housing 1 through the air vent valve 4 .

By adopting the assembly housing 1 of the present embodiment, it is possible to effectively avoid the problem that the piping 2 and the lead wires 31 extending from the cylinder head 5 of the internal combustion engine 6 pressurize the internal volume of the engine room of the vehicle. For example, in a small hybrid vehicle, as shown in FIG. 4, it is possible to further narrow the clearance C to be secured between the internal combustion engine 6 and the PCU 7, so that they can be properly accommodated within the limited engine room. can be accommodated. Therefore, it is possible to use the design of the existing internal combustion engine 6 and PCU 7 without newly designing and developing a small internal combustion engine 6 or PCU 7 dedicated to small vehicles.

Also, in the process of assembling the internal combustion engine 6, the piping 2, the water temperature sensor 3, and the air bleeding valve 4 are attached to the assembly housing 1 in advance, and then the ASSY including them is attached to the cylinder head 5 of the internal combustion engine 6. It is also possible to take a procedure of concatenation. By doing so, it is possible to reduce the number of man-hours in the main line for assembling the entire internal combustion engine 6 and to further improve workability.

Incidentally, in the present embodiment shown in FIG. 4, the outflow port of the cooling water from the cylinder head 5 toward the radiator is open to the side surface of the cylinder head, the outer surface facing forward of the vehicle, and the cooling water flowing out from the outflow port to the radiator extends in front of the vehicle.

The present invention is not limited to the embodiments detailed above. For example, the pipe 2 attached to the pipe mounting portion 12 of the assembly housing 1 of the above embodiment leads the cooling water to the heater core. It is also possible to take a mode of attachment. In other words, the target device into which the cooling water flows through the piping is not limited to the heater core.

In addition, the specific configuration of each part can be modified in various ways without departing from the gist of the present invention.

REFERENCE SIGNS LIST 1 assembly housing 12 pipe mounting portion 13 sensor mounting portion 14 valve mounting portion 2 pipe 3 water temperature sensor 4 valve 5 cylinder head 51 outer surface 52 outflow port 6 internal combustion engine

Claims (1)

Piping that leads cooling water to other equipment, a water temperature sensor that detects the temperature of the cooling water, and separation of gas mixed in the cooling water from the cooling water outlet in the cylinder head of the internal combustion engine. for assembling a valve that allows
a pipe mounting portion communicating with the outflow port of the cylinder head and extending substantially parallel to the outer surface of the cylinder head on which the outflow port is open to which the pipe is mounted;
a sensor mounting portion communicating with the outflow port of the cylinder head and extending in a direction different from the direction in which the piping mounting portion extends and being substantially parallel to the outer surface of the cylinder head on which the outflow port is open;
A valve that communicates with an outflow port of a cylinder head and that is mounted so as to extend substantially parallel to an outer surface of the cylinder head on which the outflow port is open and in a direction different from the direction in which the pipe mounting portion and the sensor mounting portion extend. a mounting portion;
An assembly housing in which the pipe attachment portion and the sensor attachment portion extend in substantially the same plane and in directions opposite to each other .

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