JPH07332178A - Intake temperature adjusting deice of slide valve type - Google Patents

Abstract

PURPOSE:To reduce noise generation from a suction temp. adjusting device which is installed at the suction port of an air cleaner and has inlet for a cool air and warm air. CONSTITUTION:The temp. in a passage within a suction temp. adjusting device is sensed by the temp. sensitive part of a temp. sensitive actuating device, and the rates of flow of a cool air and warm air are regulated through the actuator of the temp. sensitive actuating device which is actuated by the temp. sensitive part, wherein at the two inlets 3, 4 of this arrangement, a slide plate 13 is installed which is put in slide contact in such a way as going across the openings and is allowed to slide so that one of the inlets is left open and the other is opened to a certain minor extent, and the actuator 10 of the temp. sensitive actuating device 6 is connected with the slide plate 13. Because the slide plate moving direction is perpendicular to the air flowing direction, fluttering can be prevented to lead to suppression of noise generation. Also because no change is generated in the opening sections of the inlets 3, 4 due to deflection of the slide plate 13, the accuracy in the engine control can be heightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide valve type intake air temperature adjusting device installed at an intake port of an air cleaner of an engine mounted on an automobile.

[0002]

2. Description of the Related Art In recent years, with the development of automatic control of engines mounted on automobiles, in addition to carburetor engines, fuel injection engines have been manufactured, and peripheral parts therefor have been variously modified. Even in the intake system of the conventional carburetor type engine, there are some intake passages formed so as to use warm air heated by heat during engine operation or to use blow-by gas.

An automatic intake air temperature controller (ATC) 1 shown in FIG. 3 is provided in the intake passage connected to the intake port of the air cleaner. The automatic intake air temperature adjusting device 1 has a supply port 2 connected to an air cleaner, an inlet 3 for cool air (outside air), and an inlet 4 for warm air (air warmed by the engine), and an inlet 4 for warm air and an inlet for the air cleaner. The passage 5 is connected to the supply port 2 in substantially the same direction, and a cool air inlet 3 is formed in the middle of the passage 5.

A body portion 7 of the temperature-sensitive operating device 6 is fixed inside the passage 5, and a temperature-sensitive portion 8 of the temperature-sensitive operating device 6 is positioned near the supply port 2. In addition, cool air inlet 3
A butterfly valve 9 is provided in the actuator, and an actuator 10 of the temperature-sensitive operating device 6 that is operated by the temperature-sensing unit 8 is connected to the butterfly valve 9. In this mechanism, wax is housed in the temperature sensing unit 8, the actuator 10 expands and contracts due to the volume change of the wax depending on the temperature, the valve body of the butterfly valve 9 is moved in an arc shape, and the intake air temperature detected by the temperature sensing unit 13 is detected. Is adjusted to stop at the position where the temperature reaches the set temperature. As another mechanism, there is a mechanism in which a coil-shaped bimetal is used in the temperature sensing section to adjust the angle of opening (see Japanese Utility Model Publication No. 57-78754, Japanese Utility Model Publication No. 56-145651, etc.).

[0005]

However, when the temperature of the cool air is close to the intake air temperature setting temperature (when the engine output is high), the automatic intake air temperature adjusting device 1 has a butterfly valve 9 as shown in FIG. The valve body is slightly opened, and the valve element resonates due to the pulsation of intake air, and the flapping phenomenon easily occurs. If the flapping phenomenon occurs, the intake air temperature fluctuates, which causes fluctuations in the output and exhaust gas.
Further, the valve element vibrates and frequently strikes the inner surface of the passage, which causes noise.

It is an object of the present invention to provide a slide valve type intake air temperature adjusting device in which the operation of the cool air and warm air distribution mechanism is ensured.

[0007]

In order to achieve the above object, the present invention provides a two-branch passage for taking in cool air and warm air by merging them into the intake port of an air cleaner, and temperature-sensing the temperature inside the passage. In an intake air temperature adjusting device for an engine, which is configured to adjust the flow rates of cool air and warm air through an actuator of the temperature sensitive device that is detected by the temperature sensitive part of the device and operates by the temperature sensitive part, cool air and warm air A slide plate that slides in such a way that it crosses the opening so that one of the entrances is wide and the other is small is installed at the entrance of the The actuator of the actuator is connected.

[0008]

Since the present invention is configured as described above, the flow rate of cool air and warm air can be balanced by moving the slide plate, and the actuator expands or contracts depending on the temperature detected by the temperature sensing part, and slides. The plate can be slid along the inlets of cool air and warm air, and the air entering the air cleaner can be adjusted to the intake air set temperature.

Further, since the moving direction of the slide plate is orthogonal to the air flow direction, the size of the opening does not change even if the slide plate moves due to the pressure of the sucked air. Further, the slide plate is extended in the direction of the passage to prevent contact with the inner surface of the passage due to flapping.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The automatic intake air temperature adjusting device 1 according to the present invention is attached to an intake port of an air cleaner. As shown in FIG. 1, the automatic intake air temperature adjusting device 1 has an air cleaner supply port 2 and a warm air inlet port 4 through a passage 5. The cool air inlet 3 is formed in the middle of the passage 5 in the same direction. The warm air inlet 4 is a pipe that projects into and out of the passage.
11, the cool air inlet 3 is also formed of a pipe 12 protruding into and out of the passage, and accommodates a slide plate 13 in sliding contact with the openings of both inlets 3 and 4.

As shown in FIG. 2, the slide plate 13 has holes corresponding to the cool air inlet 3 and the warm air inlet 4.
14 and 15 are cool air inlet 3 and warm air inlet 4
It is formed at a position smaller than the interval between the and, and is connected to the actuator 10 of the temperature sensitive operating device 6. The body portion 7 of the temperature-sensitive operating device 6 is fixed, and the temperature-sensitive portion 8 is set at a position close to the supply port 2.

With the above construction, the actuator 10 expands and contracts due to the temperature change of the intake air, and the slide plate 13 moves linearly to cross the openings of the cool air inlet 3 and the warm air inlet 4. To slide.
As a result, the flow rate of cool air and the flow rate of warm air can be adjusted, and the intake pressure acts perpendicularly to the movable direction of the slide plate 13, so that the fluttering of the slide plate 13 is eliminated.

Therefore, the noise from the automatic intake air temperature adjusting device 1 is almost eliminated, and the flow velocity is stable.
The accuracy of output and exhaust gas control can be improved.

Even if the cool air inlet 3 and the warm air inlet 4 are reversed, the same is true. Even if both the inlets are brought close to each other and the holes 14 and 15 formed in the slide plate 13 are used in common. Alternatively, the cool air inlet 3 and the warm air inlet 4 may be provided in parallel with each other in the sliding direction of the slide plate 13.

[0015]

Since the present invention is the slide valve type intake air temperature adjusting device constructed as described above, the slide plate does not resonate, and the openings of the cool air inlet and the warm air inlet due to the deviation of the slide plate are formed. Since the change of the cross section does not occur, the generation of noise can be suppressed, the quietness can be improved, and the function of the engine can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an automatic intake air temperature adjusting device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the automatic intake air temperature adjusting device shown in FIG. 1 with a slide plate as a front surface.

FIG. 3 is a sectional view of a conventional automatic intake air temperature adjusting device.

FIG. 4 is a cross-sectional view of a main part of the automatic intake air temperature adjusting device shown in FIG.

[Explanation of symbols]

 1 Intake air temperature adjusting device 3 Cool air inlet 4 Warm air inlet 5 Passage 6 Temperature sensing device 8 Temperature sensing unit 10 Actuator 13 Slide plate

Claims (1)

[Claims] 1. A two-branch passage is provided at an intake port of an air cleaner to merge and take in cool air and warm air, and the temperature inside the passage is detected by a temperature-sensing portion of a temperature-sensing device and is operated by the temperature-sensing portion. In an intake air temperature adjusting device for an engine, which adjusts the flow rates of cool air and warm air through an actuator of the temperature-sensitive operating device, the cool air and warm air inlets are slidably contacted across the opening. And a slide plate that slides so that one of the inlets is opened to a large extent and the other is opened to a small extent, and the actuator of the temperature-sensitive operating device is connected to the slide plate. Intake air temperature adjustment device.