JP3353113B2 - Arrangement structure of intake port of vehicle engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for arranging an intake port of a vehicle engine.

[0002]

2. Description of the Related Art Conventionally, an intake port of an engine arranged in an engine room of a vehicle is arranged in an engine room.
A radiator with a fan is arranged at the front end of the engine room.

[0003]

Conventionally, high-temperature air from a radiator sometimes flows into an intake port of an engine, and it is desired to prevent this. # It is an object of the present invention to provide an arrangement structure of an intake port of a vehicle engine that meets such a demand.

[0004]

Means for Solving the Problems In order to solve the above problems,
First aspect of the present invention, the intake port of the engine to place the engine compartment of the vehicle, the deflection direction of the air by the fan of the radiator to be placed in front of d Njinrumu disposed on the side opposite the direction of the engine room, Arrange the inlet
Vented to the side of the engine room opposite to the side
Consists of a ventilation control section with a mouth and a diaphragm section
While placing the diaphragm actuator,
Cooling water reserve tank in front of the flam actuator
Has been arranged . The invention according to claim 2 is a vehicle
Adjust the intake port of the engine located in the engine room
Empty by the radiator fan located at the front end of the room
On the side of the engine compartment in the direction opposite to the air deflection direction.
And the engine valve on the side opposite to the side where the intake port is located.
A ventilation control unit with an air opening and a diamond on the side of the
Diaphragm actuator composed of a diaphragm
Place and vent the diaphragm actuator
A predetermined volume space is secured between the control unit and the ventilation control unit.
A cover is provided to cover the
The outlet is open.

[0005] Air from the radiator is deflected in the direction of rotation of the fan. And in the present invention, the air generated by the fan
The high temperature air from the radiator is prevented from flowing into the intake port because the intake port of the engine is disposed on the side opposite to the deflection direction of the engine.

Here, when a diaphragm actuator composed of a ventilation control section having an atmosphere opening port and a diaphragm section is provided in an engine room, the diaphragm actuator is disposed on a side opposite to an intake port of the engine on a layout. I have to help. As a result, air containing water droplets easily flows to the arrangement portion of the diaphragm actuator. According to the first aspect of the present invention, since the cooling water reserve tank is disposed in front of the diaphragm actuator, it is advantageous that water is less likely to be applied to the diaphragm actuator. The invention according to claim 2
In, since the diaphragm actuator, and a cover for covering the vent control unit to ensure a predetermined volume space provided is opened to atmospheric opening of the vent control unit within the cover between the ventilation control section, the air Advantageously, water can be prevented from entering through the opening.

[0007]

FIG. 1 shows an engine room of a vehicle. A radiator R is disposed at a front end of the engine room. The fan RF of the radiator R rotates leftward when viewed from the front of the vehicle, and air from the radiator R flows in the rotation direction of the fan RF as indicated by the arrow in FIG. Deflect. Therefore,
High temperature air from the radiator R is supplied to the intake port Ea of the engine E.
To prevent the air from flowing into the intake port Ea,
It is arranged on the side of the engine room in the direction opposite to the rotation direction of the fan RF, that is, on the right side.

In the engine room, a diaphragm actuator 1 as an actuator for a constant speed traveling device is provided. This diaphragm actuator 1
As shown in FIG. 2, the ventilation control unit 2 and the diaphragm unit 3
It is composed of The diaphragm portion 3 includes a pressure chamber 3b defined by the diaphragm 3a, and houses a spring 3c for urging the diaphragm 3a in the pressure chamber 3b, and passes through the atmospheric pressure chamber on the opposite side of the pressure chamber 3b. A rod 3d connected to the diaphragm 3a and protruding outside the casing of the diaphragm portion 3 is provided, and a wire 3e connected to the accelerator pedal is locked to the rod 3d.

The ventilation control unit 2 includes a vent valve 2c and a safety valve 2d that connect the pressure chamber 3b to the atmosphere opening port 2a in a casing having an atmosphere opening port 2a and a negative pressure introduction port 2b. The chamber 3b is connected to the negative pressure inlet 2b.
Are provided with three solenoid valves including a vacuum valve 2e communicating with the solenoid valve. The negative pressure introduction port 2b is connected to the intake passage of the engine through a pipe 4 having a check valve 4a interposed therebetween. When the vacuum valve 2e is opened, the intake negative pressure is introduced into the pressure chamber 3b, and the diaphragm 3a is pulled. The accelerator pedal is driven in a direction to increase the throttle opening by the movement in the direction. When the vent valve 2c is opened, the pressure chamber 3
Atmosphere is introduced into b, the negative pressure in the pressure chamber 3b decreases, and the accelerator pedal is driven in a direction to decrease the throttle opening by the movement of the diaphragm 3a in the pushing direction. The safety valve 2d opens when the operation of the constant-speed traveling device is released or when an abnormality occurs. These valves 2c, 2d, and 2e are controlled by an electronic control circuit so that an appropriate vehicle speed is obtained. A filter 2f is mounted on each of the vent valve 2c and the safety valve 2d on the side of the air opening 2a, and an accumulator 4b for storing a negative pressure is connected to the negative pressure introducing line 4.

[0010] Such a diaphragm actuator 1
In this case, if water enters through the air opening 2a, the ventilation control unit 2 is adversely affected. In particular, the intake port Ea of the engine E
Is arranged as described above, air containing water droplets easily flows to the arrangement portion (the left side of the engine room when viewed from the front) of the diaphragm actuator 1 which must be arranged on the opposite side to the intake port Ea on the layout. Therefore, waterproof measures for the diaphragm actuator 1 are required. For this reason, in the present embodiment, the reserve tank T for cooling water is arranged in front of the diaphragm actuator 1 so that water is hardly applied to the diaphragm actuator 1.

Also, the diaphragm actuator 1
As shown in FIGS. 3 to 5, a predetermined volume space is secured between the ventilation control unit 2 and a cover 5 that covers the ventilation control unit 2 is attached, and an air opening 2 a is opened in the space inside the cover 5. Let me. Therefore, the atmosphere opening port 2a into the ventilation control unit 2
When the air is sucked from the air, the air including the water droplets from outside the cover 5 does not pass through the inside of the cover 5 and is sucked into the air opening port 2a as it is, so that the intrusion of water from the air opening port 2a is prevented.

Further, a mounting stay 6 is fixed to the outer surface of the casing of the diaphragm portion 3, and one end 6a and the other end 6b of the stay 6 are, as shown in FIG. The diaphragm actuator 1 is mounted on one side of the engine room with the ventilation control unit 2 covered with the cover 5 facing outward, with the front wheel house WH and the damper housing DH bolted.

When the diaphragm actuator 1 is mounted as described above, the projecting surfaces of the air opening 2a and the negative pressure inlet 2b of the ventilation control unit 2 are directed substantially forward, and the air opening a is connected to the negative pressure inlet 2b. It is located above. The stay 6 includes a check valve 4a in the middle of the pipe 4 connected to the negative pressure inlet 2b, and a harness 7 for the valves 2a, 2b, 2c drawn out from the vicinity of the negative pressure inlet 2b. The connector 7a at the end is held. 3f in the figure is
A bracket 4c, which is attached to the outer surface of the casing of the diaphragm 3 together with the stay 6 and locks the outer tube of the wire 3e, is a connection port for an accumulator 4b protruding from the outer surface of the check valve 4a.

In this embodiment, the rear half 5a of the outer end face of the cover 5 is used to prevent interference with the vehicle body and to secure a space for inserting a tool when bolting one end 6a of the stay 6 to the tool. Cannot bulge outward much, so that the front half part 5b of the outer end face is largely bulged outward to increase the volume of the space in the cover 5.

Further, the upper half 5c of the front side wall of the cover 5 facing the protruding surface of the air release port 2a and the negative pressure introduction port 2b of the ventilation control section 2 is swelled forward to release the air therein. Mouth 2
a, and an air opening 2 is provided on the inner surface of the upper half 5c.
A rib 5d forming a maze-shaped flow path leading to a is provided so as to prevent water from entering the atmosphere opening port 2a more effectively.

Here, the space inside the cover 5 is of course provided at the same height as the diaphragm actuator 1 so that it is difficult to be covered with water.
A gap is secured over substantially the entire circumference between the open end of the diaphragm actuator 1 and the diaphragm actuator 1 so that even if the lower portion of the cover 5 is wet, the space in the cover 5 is increased through the upper gap of the cover 5. It is opened to the atmosphere, and the toughness against water is further improved.

As shown in FIGS. 5 and 6, the cover 5 is screwed to the end face of the diaphragm 3 on the side of the ventilation control section 2 at a pair of upper and lower bosses 5e, 5e projecting from the rear side wall. Since the upper half 5c of the front side wall of the cover 5 bulges forward as described above, a boss for screwing cannot be formed here, and the lower half of the front side wall is shown in FIG. As described above, since the negative pressure introduction port 2b and the harness 7 are formed in a cutout shape that is exposed to the outside, a boss portion for screwing cannot be formed here. Therefore, in this state, the cover 5 is supported at the rear side in a cantilever manner, and the vibration is easily generated. Therefore, in the present embodiment, as shown in FIGS.
The claw piece 5f is integrally formed on the lower half of the front side wall, and the claw piece 5f is engaged with the protruding edge 2g of the outer edge of the ventilation control section 2, so that the cover 5
Vibration can be prevented.

In this embodiment, as shown in FIGS. 4 and 5, a drain hole 5g is formed in the lower surface of the cover 5 so that even if water enters the cover 5, the drain hole 5g is formed through the drain hole 5g. Water can be discharged out of the cover 5, and the stay 6 faces the drain hole 5g. Water staying from below is blocked by the stay 6, and water is drained into the drain hole 5g. Can be prevented from entering. In addition, a waterproof wall 5h is provided vertically below the drainage hole 5g on the lower surface of the cover 5 so that water splashing from the front can be prevented from entering the drainage hole 5g.

[0019]

As is apparent from the above description, according to the present invention, high-temperature air from the radiator can be prevented from flowing into the intake port of the engine.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an engine room showing an example of the present invention.

FIG. 2 is a schematic cross-sectional view of a diaphragm actuator arranged in an engine room.

FIG. 3 is a plan view of a diaphragm actuator with a cover attached.

FIG. 4 is a side view seen from the direction of arrow IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

6 is a side view as viewed from the direction of arrow VI in FIG. 5;

FIG. 7 is an enlarged sectional view taken along the line VII-VII of FIG. 4;

[Explanation of symbols]

E engine Ea intake port R radiator RF fan T reserve tank for cooling water 1 diaphragm actuator

Claims (2)

(57) [Claims] 1. A intake port of the engine to place the engine compartment of the vehicle, it is arranged on the side of the opposite direction of the engine room to the deflection direction of the air by the fan of the radiator to be placed in front of d Njinrumu, the inlet A diaphragm actuator composed of a ventilation control unit having an air release port and a diaphragm unit is arranged on the side of the engine room opposite to the side where the unit is arranged, and a reserve tank for cooling water is provided in front of the diaphragm actuator. arrangement of the inlet of the vehicle dual engine you wherein placing. 2. An engine disposed in an engine room of a vehicle.
Radiator that places the intake port of the engine at the front end of the engine compartment
In the direction opposite to the direction of air deflection by the
It was located on the side of Jinrumu, on the side opposite the engine room and side to place the air inlet, with disposing the diaphragm actuator composed of a ventilation controller and the diaphragm portion having air opening The diaphragm actuator is provided with a cover for securing a predetermined volume space between the diaphragm control unit and the ventilation control unit, and an air opening of the ventilation control unit is opened in the cover.
Arrangement of the inlet of that car dual engine.