JP2002326520A - Engine room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a warming up operation time by speeding up temperature increase of an engine in the warming up operation by restricting a suction amount of the outside air from an intake port opening to an engine room during low temperature. SOLUTION: In the engine room 9 for storing the engine 10 of a hydraulic shovel 1, an openable/closable shutter is disposed in the intake port 15 of air for combusting fuels of or cooling the engine, the shutter defines a louver 19 that adjusts air and can turn each plate 10, and an actuator operates the shutter in the closing direction of it when temperatures detected by outside air sensors 25 and 29 are lower than predetermined temperatures.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic shovel engine room.

[0002]

2. Description of the Related Art A conventional intake port of this type is opened at an appropriate position on a wall plate constituting an engine room. The conventional intake port is provided with a net or by using a louver. Although it prevents foreign substances from entering from here, the opening area thereof is constant and cannot be adjusted.

[0003]

SUMMARY OF THE INVENTION In the case of a hydraulic excavator,
Work is performed in all environments from high to low temperatures. In a low temperature environment, the engine is warmed up when the engine is started. However, since the opening area of the intake port provided in the conventional engine room is constant, the intake amount of the outside air during the warm-up operation is constant irrespective of the outside air temperature, that is, the same as when the temperature is high. For this reason, during this warm-up operation, a large amount of low-temperature outside air is drawn into the engine room as in the normal operation, and it takes a long time for the engine temperature to rise, and it takes a long time for the warm-up operation. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and limits the amount of outside air to be taken in from an intake port opened to an engine room at a low temperature to speed up an engine temperature rise during a warm-up operation. It is an object of the present invention to provide an engine room capable of shortening a warm-up operation time.

[0005]

In order to achieve the above object, a first aspect of the present invention is to provide an air inlet for fuel combustion and cooling air for an engine of an excavator in an engine room accommodating the engine. And a shutter that can be opened and closed.

According to the first aspect of the present invention, the amount of intake air from the intake port can be adjusted by opening and closing the shutter. Therefore, by closing the shutter during the warm-up operation when the outside air temperature is low, the intake amount of the low-temperature intake air can be reduced, and the engine temperature rises in a short time, and the warm-up time can be shortened.

According to a second aspect of the present invention, the shutter according to the first aspect of the present invention is configured such that each plate is a louver capable of rotating each plate, which also functions as a wind adjuster. Further, a third aspect of the present invention relates to the first and second aspects of the present invention. When the temperature detected by the outside air temperature sensor is equal to or lower than a predetermined temperature, the actuator operates in the closing direction of the shutter.

According to the second and third aspects of the invention, the operation and effect of the above-described first aspect of the invention can be favorably exhibited.

According to a fourth aspect, in the third aspect, each plate of the louver constituting the shutter is connected by a link and connected to an actuator via a push-pull link. According to the invention,
By operating the actuator, each plate of the louver constituting the shutter can be opened and closed smoothly and reliably.

[0010]

Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a hydraulic shovel for implementing the present invention, 2 denotes a crawler-type traveling device thereof, and 3 denotes a swivel mounted on the crawler-type traveling device 2. The swivel 3 is provided with an operator cab 4 and a hydraulic excavator 8 including a boom 5, an arm 6, a bucket 7, and the like. Further, an engine room 9 is provided behind the operator cab 4. A counterweight 3a is provided around the rear side of the engine room 9.

As shown in FIG. 2, an engine 10 has an engine 10 in a state in which its crankshaft is directed laterally, a radiator 11, a fan 12 and an intake cleaner 13 to the left, and a muffler 14 as shown in FIG. Is located on the right side.

On the upper surface of the engine room 9, the engine 1
The intake port 15 is provided at a position facing the radiator 11 and the intake cleaner 13 of zero, and the exhaust port 16 is provided at a position facing the muffler 14. The intake port 15 and the exhaust port 16 are provided at symmetric positions with respect to the center of the swivel 3. Further, an auxiliary intake port 17 and an auxiliary exhaust port 18 are provided on the center side of the swivel 3 of the intake port 15 and the exhaust port 16, respectively. The auxiliary suction / exhaust ports 17 and 18 are closed by a breathable dustproof body such as a net.

The intake port 15 and the exhaust port 16 are provided with louvers 19 and 20 for air conditioning. And especially the inlet 15
The louver 19 provided on the side is openable and closable, and has a shutter function.

The louver 19 of the intake port 15 is as shown in FIGS.
Is rotatable, the tip of each plate 19a is connected by a link 21, and one plate is connected to a rod 23a of a solenoid valve 23 via a push-pull link (or push-pull wire) 22. The louver 19 is opened and closed via the push-pull link 22 by the operation of the solenoid valve 23.

As shown in FIG. 7, the solenoid valve 23 has a solenoid 23b connected to an outside air temperature sensor 25 and a power supply 26 via a relay 24. ON the outside air temperature sensor 25 is low set temperature t ₁ below, for example, be 5 ° C. or less
When the outside air temperature sensor 25 is turned on, the relay 24 is turned on, and the solenoid 23b is energized. This causes the solenoid 23b to operate and the rod 2 of the solenoid valve 23 to operate.
3a is moved in a shortened manner against the spring 23c to close the louver 19 via the push-pull link 22.

In the above configuration, at the start of the engine 10, the solenoid valve 23 is turned ON, the louver 19 of the inlet 15 is closed when the outside air temperature at this time is lower than the set temperature t ₁ of the outside air temperature sensor 25 .

Therefore, at this time, the intake air into the engine room 9 is sucked only through the auxiliary intake port 17 and the engine 10
Start and warm-up operation are performed in a state where the amount of intake air from the outside of the engine room 9 where the temperature is low is limited, and the engine 10 warms while sucking more air at a temperature higher than the outside air temperature inside the engine room 9. Machine.

As a result, the engine 10 can be easily started even at a low temperature, and the warm-up operation can be performed in a short time.

[0019] In the above structure, when the outside air temperature is lower than the set temperature t ₁ is operated the solenoid valve 23 via a relay 24 detects this constantly at the outside air temperature sensor 25,
Even when the warm-up operation is completed and the normal operation is started, the intake port 15 is kept in the closed state, and the necessary intake amount is set to the auxiliary intake port 1.
7, the relay 24 may be turned off manually or automatically at the end of the warm-up operation.
May be opened regardless of the outside temperature.

In the above embodiment, the solenoid valve 23 is
An example using an N, OFF type is shown in FIG.
As shown in FIG. 7, a proportional solenoid valve 27 is used, and its solenoid is connected to an outside air temperature sensor 29 and a power supply 30 via a calculation unit 28, and the proportional solenoid valve 27 is operated in proportion to the temperature detected by the outside air temperature sensor 29. In this way, the opening of the louver of the intake port 15 may be changed steplessly in accordance with the outside air temperature.

[0021] so that the outside air temperature as the opening ratio α of the louver 22 at this time is shown in curve a of Figure 9 is gradually increased with increasing temperature from the set temperature t ₁ required warm-up temperature.

[0022] At this time, for example if there is no auxiliary air inlet 17, since it is not good to completely close the louvers 19 of the suction port 15, as shown by curve b, the set temperature t ₁ allowed to maintain a predetermined aperture ratio alpha ₁ also when. If there is no auxiliary intake port 17, as indicated by the curve b in FIG. 9, be allowed to maintain a predetermined aperture ratio alpha ₁ in the closed state, the engine intake amount for sucking the air cleaner 13 If the amount of air is insufficient, another intake port is provided in the engine room 9 for taking in the air for the intake of the engine.

[Brief description of the drawings]

FIG. 1 is a side view showing a hydraulic excavator to which the present invention is applied.

FIG. 2 is a plan view showing a main part of an engine room to which the present invention is applied.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view showing a main part of the present invention.

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

FIG. 6 is an operation explanatory view in a BB section of FIG. 4;

FIG. 7 is an electric circuit diagram of the louver opening / closing means.

FIG. 8 is another electric circuit diagram of the louver opening / closing means.

FIG. 9 is a diagram showing the relationship between the outside air temperature and the louver opening / closing rate.

[Explanation of symbols]

1 ... hydraulic excavator, 2 ... crawler type traveling device, 3 ... turn table,
3a: counter weight, 4: driver's cab, 5: boom, 6
... arm, 7 ... bucket, 8 ... digging rig, 9 ... engine room, 10 ... engine, 11 ... radiator, 12 ... fan, 13 ... intake cleaner, 14 ... muffler, 15 ... intake port, 16 ... exhaust port, 17 ... Auxiliary intake port, 18 Auxiliary exhaust port, 19, 20 Louver, 19a Plate, 21 Link, 22 Push-pull link, 23 Solenoid valve, 23
a ... rod, 23b ... solenoid, 23c ... spring, 24
... Relay, 25, 29 ... Outside air temperature sensor, 26,30 ... Power supply, 27 ... Proportional solenoid valve, 28 ... Calculation unit.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F01P 7/12 F01P 7/12 C 11/10 11/10 K (72) Inventor Maki Naruse Komatsu, Ishikawa Satsuzumachi 23 Inside Komatsu Seisakusho Awazu Plant (72) Inventor Fujimura Takamura 3-1-1 Ueno, Hirakata-shi, Osaka Prefecture Komatsu Seisakusho Osaka Plant F-term (reference) 3D003 AA07 AA08 BB14 CA03 DA02 3D038 AA04 AA06 AB09 AC10 AC11 AC17 BA04 BA05 BA12 BA13

Claims (4)

[Claims] An engine (10) in an engine room (9) accommodating an engine (10) of a hydraulic shovel.
An engine room, characterized in that an openable / closable shutter is provided at an intake port (15) for air for fuel combustion and cooling. 2. The engine room according to claim 1, wherein the shutter is a louver (19) that also serves as a wind adjuster, and each plate (10a) is rotatable. 3. The engine compartment according to claim 1, wherein the actuator operates in the closing direction of the shutter when the temperature detected by the outside air temperature sensor (25, 29) is equal to or lower than a predetermined temperature. . 4. A louver (19) constituting a shutter, wherein each plate (10a) is connected by a link (21) and connected to an actuator via a push-pull link (22). The described engine room.