JPS6010904Y2 - Engine room ventilation system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engine room ventilation system that exhausts hot air from the engine room of an automobile to the outside.

Generally, the temperature of the engine room in a car, where the engine is housed, rises due to the hot air emitted by the engine.When the car is running, wind flows into the engine room, and the engine room is ventilated and the hot air is removed. By exhausting the air to the outside, the temperature inside the engine compartment does not rise significantly, but when the car is running at low speed or stopped, there is not enough airflow to ventilate the engine compartment, and the engine compartment cannot be ventilated using only the cooling fan. If only the hot air is ventilated to the outside, the temperature of various devices installed in the engine room may rise, causing various heat damage and causing malfunction.

In particular, immediately after the engine stops operating, the cooling fan also stops, so there is almost no ventilation in the engine room, and the temperature in the engine room increases significantly, making the above heat damage such as difficulty in restarting the engine more noticeable. be.

In addition, as a countermeasure against engine noise, if the engine room is sealed to shield noise propagated from the engine room to the outside, the above heat damage is even more likely to occur.
The impact will also be serious.

To prevent the heat damage mentioned above, it is sufficient to ventilate the engine room by connecting the engine room to the atmosphere and discharging hot air to the outside.In particular, if the upper part of the engine room is opened to the atmosphere, Although ventilation can be performed efficiently, if the upper part of the engine room is opened to the atmosphere, measures must be taken to prevent rainwater from entering, which may complicate the structure.

In view of this, the present invention is designed to efficiently ventilate the engine compartment by communicating the upper part of the engine compartment with the atmosphere. A device that introduces fresh air into the passenger compartment (for example, Utility Model No. 49-96619)
This is an engine room ventilation system that focuses on the point in issue (No. 1), utilizes the slits in the cowl panel, provides ventilation holes in the cowl panel that open into the engine room, and exhausts hot air from the engine room through the slits. It provides:

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an engine room formed at the front of an automobile. An engine 2 is housed in the engine room 1, and the upper surface is closed by a bonnet 3 so as to be openable and closable.

In the engine 2, 2a is a cooling fan, 2b is a radiator, and 4 is a front wheel.

Further, 5 is a cowl panel arranged at the rear of the upper part of the engine room 1, and 6 is a dash panel upper, which is formed by joining the cowl panel 5 forming the upper surface and the front surface with the dash panel upper 6 forming the lower surface and the rear surface. A space 8 is formed between the two, which extends in the width direction of the vehicle and is partitioned from the engine room 1 and the passenger compartment 7.

In addition, 9 is a dash panel lower that partitions the engine compartment 1 and the vehicle compartment 7 below the dash panel upper 6;
10 is a windshield.

As shown in FIG. 2, the cowl panel 5 has a slit 11 opening to the atmosphere on the top surface and a ventilation hole 12 opening to the upper rear of the engine compartment 1 on the front surface. is the above cowl panel 5
It is provided so as to communicate with the atmosphere through a space 8 formed by the dash panel upper 6 and the dash panel upper 6.

Further, the dash panel upper 6 is provided with a communication hole (not shown) that opens into the vehicle interior 7, and is provided so that the running wind from the slit 11 flows into the vehicle interior 7.

The ventilation hole 12 of the cowl panel 5 is provided with an opening/closing lid 13 for opening/closing the ventilation hole 12, and the opening/closing lid 13 has an operating mechanism that operates to open/close the opening/closing i13 in conjunction with the stoppage of the engine 2. 14 are linked.

In FIG. 2, the opening/closing lid 13 has a pivot 15 at the lower edge.
The operating mechanism 14 is connected to a link 16, one end of which is fixed to the pivot 15 of the opening/closing lid 13, and the other end of the link 16 through a long hole 16a. It is composed of a bell crank 17 and a solenoid 18 linked to the other end of the bell crank 17 to open and close the opening/closing lid 13.
The opening/closing lid 13 is closed when a is extended (de-energized), and when it is shortened (
The opening/closing lid 13 is configured to open when the magnet is excited.

The solenoid 18 is connected to an electric circuit as shown in FIG.
It operates to open the door.

That is, a transistor 20 having a switching function is connected in series to a circuit connecting the solenoid 18 and a power source 19, and the base of this transistor 20 is connected to the non-power side of an ignition switch 22 via a timer 21. The timer 21 is activated when the ignition switch 22 is opened from the closed state, and turns on the transistor 20 for a predetermined period of time to excite the solenoid 18.

Therefore, according to this embodiment, when the engine 2 is in operation, the solenoid 18 is de-energized and the lid 13 is opened and closed.
When the engine compartment 1 is closed and the engine 2 is stopped, the lever maid 18 is excited to open the opening/closing lid 13, and the hot air in the engine room 1, which has risen in temperature after the engine stops, is discharged to the atmosphere through the vent 12, the space 8, and the slit 11. Then, the engine room 1 is ventilated, and the opening/closing lid 13 is closed after a certain period of time has elapsed.

By opening the opening/closing lid 13, the temperature increase in the engine room 1 is suppressed and the occurrence of heat damage is prevented, and by closing the opening/closing lid 13 during engine operation, hot air and noise in the engine compartment 1 are reduced. It does not flow into the passenger compartment 7 through the ventilation hole 12 and the space 8.

In addition, when it rains, rainwater flows through the slit 11 into the space 8.
However, rainwater in this space 8 flows laterally along the dash panel upper 6 and is discharged from the opening/closing lid 13.
There is almost no rain or ice entering the engine room 1 even when the engine room 1 is open.

In particular, if you want to prevent rainwater from entering the engine compartment 1 through the ventilation holes 12 when using the opening/closing lid 13, as in the modification shown in FIG. It is pivoted to rotate around a pivot 23 at the upper edge, and an operating mechanism 24 consisting of a link 16, a bell crank 17, and a solenoid 18 similar to those described above is linked to this pivot 23, and immediately after the engine 2 is stopped, The opening/closing lid 13 is rotated so that the lower part thereof is opened to exhaust hot air from the engine room 1. Structures that are the same as those in FIG. ing.

In addition, when considering the flow of hot air when the opening/closing lid 13 is opened, a type that opens wide at the top as shown in Figure 2 is preferable to a type that opens at the bottom as shown in Figure 4 above. The ventilation efficiency of engine room 1 is good.

Next, FIG. 5 shows an example of an operating mechanism 25 that is operated by negative pressure in the intake pipe of the engine 2. One end of the link 16 is fixed to the pivot 15 at the lower end of the opening/closing lid 13, and the other end of the link 16 is provided with an elongated hole 16a.
One end of the bell crank 17 is connected to the other end of the bell crank 17 via the rod 2 of the diaphragm device 26.
6a are linked, and this diaphragm device 2
When the intake pipe negative pressure is acting on the negative pressure connection port 26b of No. 6, that is, when the engine 2 is running, the rod 26a moves back and closes the opening/closing lid 13. When the intake pipe negative pressure is not acting, that is, when the engine 2 is running, the rod 26a When stopped, the rod 26a moves forward to open the opening/closing lid 13, and the same structures as those in FIG. 2 are given the same reference numerals and explanations are omitted.

In the case of this example, the opening/closing lid 13 is in an open state while the engine 2 is stopped, and compared to the above embodiment, the opening/closing lid 13 is in an open state.
The structure is simplified by eliminating the need for an electric circuit as shown in the figure.

Therefore, according to the present invention as described above, by communicating the engine compartment with the atmosphere through the space formed by the cowl panel and the upper dash panel, there is no wind when the vehicle is stopped, and Even when the engine is stopped and there is no cooling air from the cooling fan,
By communicating the upper part of the engine room with the atmosphere, hot air in the engine room can be discharged to the outside, suppressing temperature rise, and preventing heat damage.

In addition, by providing an opening/closing cover for the ventilation hole, it is possible to prevent hot air from inside the engine room from flowing into the passenger compartment.
It has considerable practical advantages, such as a structure that can easily prevent the intrusion of rainwater, etc., and excellent ventilation efficiency because the upper part of the engine room communicates with the atmosphere.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a longitudinal side view showing a schematic structure of the front part of an automobile, FIG. 2 is a cross-sectional side view showing an example of the ventilation system of the present invention, and FIG. 3 is an operating mechanism. FIG. 4 is a cross-sectional side view showing a modified example, and FIG. 5 is a cross-sectional side view showing another modified example. 1... Engine room, 2... Engine, 3... Bonnet, 5... Cowl panel, 6... Upper dash panel, 7・・・
...Car interior, 8...Space, 11...
Slit, 12...Vent hole, 13...
Opening/closing lid, 14.24.25...Operating mechanism, 15
, 23...Axis, 16...Link, 1
7...bell crank, 18... solenoid, 19... electric current 20-... transistor, 21... timer, 22... ...Ignition switch, 26...Diaphragm device.

Claims (1)

[Scope of utility model registration request] The space separated from the engine room and the passenger compartment is formed by an upper dash panel and a cowl panel, and the cowl panel has a slit opening to the atmosphere on its top surface and a ventilation hole opening to the engine room on its front surface. ,
An opening/closing lid that opens and closes the ventilation hole is attached to the front of the cowl panel, and this opening/closing lid is opened by an operating mechanism that operates in conjunction with stopping the engine.When the engine is stopped, the engine room is exposed to the atmosphere through the above space. An engine room ventilation system characterized by a continuous flow.