JPS6134028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to temperature sensing valve systems, and more particularly to temperature sensing valve systems that open and close a plurality of fluid passage means in response to actuation of a single temperature sensing bimetallic means.

Conventionally, a temperature sensing valve device has already been proposed in which a single bimetal disk controls the opening and closing of a plurality of fluid passages, for example two fluid passages, in response to a sensitive temperature change. Now, in this type of conventional device, in order to effectively control the operation of the two valve means by the reversal operation of a single bimetal disk to obtain the desired valve function, the two valve means must be operated by the bimetal disk. Accurate adaptation of the working and reversing movement has become an important requirement. However, there is a problem in that the positions of the valve means corresponding to the reverse movement of the bimetal disk are slightly shifted due to manufacturing errors and the like, resulting in a decrease in the function of the valve means. Therefore, conventionally,
A screw type adjustment means has been proposed in which the position of one valve means is screwed into the other valve means to achieve a desired arrangement, but such adjustment requires sufficient accuracy for the desired setting. In addition, there were disadvantages such as the adjusted threaded portion loosening due to vibration during use, resulting in a decrease in valve function.

Therefore, the technical problem of the present invention is to automatically adjust the effective movement amount of the second valve means with respect to the effective movement amount of the first valve means.

The technical measures taken to solve the above technical problems include a bimetallic disk biased by a first spring, and a first valve portion that controls opening and closing of the first passage in response to the reversal operation of the bimetallic disk. a second spring that urges the first valve means in a direction opposite to the bias of the first spring; a second valve means that has a second valve portion that controls opening and closing of the second passage; a third spring that biases the means in a direction opposite to the bias of the first spring; the second valve means is disposed to be slidable in contact with the first valve means; a sliding portion movable relative to the second valve portion; and a fourth spring disposed between the sliding member and the second valve portion, the first, second, third, and fourth springs. When the biasing forces of are f ₁ , f ₂ , f ₃ , f ₄ respectively, f ₁ > f ₂ + f ₃
+f ₄ and f ₄ > f ₃ .

In this way, the second valve means having the second valve portion that controls opening and closing of the second passage is capable of contacting with the first valve means responsive to the reversal movement of the bimetal disk and movable relative to the second valve portion. Since the structure includes a sliding member, the relative movement of this sliding member automatically adjusts the effective movement amount of the second valve means with respect to the effective movement amount of the first valve means in response to the reversal movement of the bimetal disk. will have the following. Therefore,
Even if some error occurs in the arrangement of both valve means, especially the second valve means, the error is absorbed by the movement of the upper gas phase and effective valve function is achieved.

An embodiment of the apparatus of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 designates a temperature-sensing valve device according to the present invention.
It has a portion 13 and a fourth portion 14. 1st part 1
1 is an inlet 17 and a passage 18 connected to an intake manifold 15 of the engine via a passage 16;
The second part 12 has an outlet 20 which is connected to the retard side 19 of the servo means for controlling the ignition time, for example via an air cleaner 2 arranged upstream of the carburetor.
1. Inlet 23 that receives air introduction through passage 22
and an outlet 26 which connects via a passage 24 to, for example, an advance side 25 of said servo means. The fourth part has a member in which an inlet 29 is formed which is connected to the advance port via a passage 28 for receiving the negative pressure generated depending on the opening and closing state of the throttle valve 27 of the carburetor.

The fourth portion 14 is screwed onto the biased portion of the engine cooling water jacket via a screw provided on the outer periphery, and is made of a material with good thermal conductivity. The bimetallic disk 31, which is disposed within the fourth part and held by the first spring 30, is configured to be freely reversible in response to changes in engine temperature, and is thereby screwed into the third part. The operation of the rod 33 installed within the annular member 32 is controlled. The isolating member 34 is fixed to the lower end of the third portion 13 by thermal caulking or the like, and the annular member 34 is
It has a protrusion 35 arranged in a recess of the annular member 32, thereby making the annular member 3
It has the function of preventing rotation by loosening the threaded part 2.

At the upper end of the aforementioned rod 33, a first means 37 is arranged which is biased towards the rod 33 by a second spring 36. The first valve means 37 includes a valve portion 3 which abuts a seat 38 provided in the second portion 12 to isolate the inlet 23 from the outlet 26 as shown.
9 and a valve portion 41 which abuts a seat 40 provided on the annular member 32 to isolate the inlet 29 from the outlet 26 .

The member 42 screwed into the first part 11 is prevented from rotating by loosening of the threaded part by a protrusion 44 of a cover 43 fixed to the first part 11 by heat caulking or the like. A second valve means 45 is disposed between the member 42 and the first valve means 37, and a third spring 5 opposing the biasing force of the first spring 30
4, the valve means 37 is biased toward the first valve means 37. The second valve means 45, as particularly apparent in FIG.
A sliding member 48 that is slidable within the main body 46 and has a tip 47 that can come into contact with the first valve means 37; and a fourth spring 49 that biases the sliding member 48 toward the first valve means 37. has. The second valve means 45 is
Further, a sheet 50 (first sheet) provided on the member 42
a valve portion 51 which is provided on the second portion 12 and which abuts against a seat 52 (FIG. 1) to shut off the inlet 17 from the outlet 20; have In addition, the valve part 53
may have the same configuration and shape as the portion 51.

In the above, the biasing forces of the first, second, third, and fourth springs 30, 36, 54, and 49 are respectively f ₁ ,
When f ₂ , f ₃ , f ₄ , f ₁ > f ₂ + f ₃ + f ₄ and f ₄ vs f ₃
It is set so that

When the bimetal disk 31 is reversed into a downward convex shape, the second spring 36 moves the first valve means 37 downward, the valve part 39 is separated from the seat 38, and the valve part 41 comes into contact with the seat 40. At this time, in the second valve means 45, the sliding member 48 is similarly moved downward within the main body 46 by the fourth spring 49. When the sliding member 48 moves a predetermined amount, the right end of the sliding member 48 contacts the stopper portion 46a of the main body 46 in FIG.
6 is prevented from moving downward. Therefore, the second valve means 45 is controlled by the third spring 54.
moves downward in FIG.
0, the valve portion 53 comes into contact with the seat 52. In this state, the tip 47 of the sliding member 48 is spaced apart from the first valve means 37.

Next, when the bimetal disk 31 is reversed to the state shown in FIG. 1, the rod 33 and the first valve means 37 are moved upward by the first spring 31 and held in the position shown. During the upward movement of the first valve means 37, the first valve means 37 first contacts the tip 47 of the sliding member 48, and after this contact, the main body 46 of the second valve means 45 is moved by the first spring 30. The valve portion 53 is then moved to the position shown in the first drawing, and the valve portion 53 is separated from the seat 52 and the valve portion 51 is brought into contact with the seat 50. In other words, the sliding portion 48 moves upward integrally with the main body 46 without moving within the main body 46.

After the main body 46 of the second valve means 45 moves to the first illustrated position until the first means 37 moves to the illustrated position, that is, during the movement until the first valve part 39 comes into contact with the seat 38. , the sliding member 48 moves relatively upward in the figure within the main body 46 so that the fourth spring 49 is deflected by the first spring 30;
At the end of the movement, the valve portion 39 comes into contact with the seat 38. This relative movement constitutes the function of adjusting the effective amount of movement of the second valve means 45 relative to the amount of effective movement of the first valve means 37 in response to the reverse movement of the bimetallic disk 31, and thus both valve means, especially the second Valve means 4
Even if there is some error in the arrangement of valve 5, the error is absorbed by the above relative movement and an effective valve function can be achieved.

The operation of the apparatus of the present invention configured as described above will be explained below.

FIG. 1 shows a state in which the engine temperature is above a predetermined value. In this state, the bimetal 31 is in an upwardly curved shape as shown in the figure.
Thus, the valve portion 39 of the first valve means 37 is seated on the seat 38 via the rod 33, and the valve portion 41 is spaced apart from the seat 40. Further, the first valve means 37 biased by the first spring 30 is activated by the second valve means 37.
It is in contact with the tip of the sliding member 48 of the valve means 45, and the main body 46 of the second valve means 45 is maintained in the illustrated position against the third spring 54. The valve part 51 is thus seated on the seat 50 and the valve part 5
3 is spaced apart from the seat 52.

Therefore, in the illustrated state, the air inlet 23 is connected to the outlet 20, and air is transmitted to the retard side 19 of the servo means for controlling the ignition time. On the other hand, the inlet 29 is connected to the outlet 26, and the advance side 25 of the servo means for the ignition timing control device is in a state where it can receive negative pressure generated at the advance port depending on the opening degree of the throttle valve 27. Therefore, for example, when the vehicle is operating at a medium load and the throttle valve 27 is located above the advance port by a predetermined amount, negative pressure is transmitted to the advance side 25 of the servo means, and as is well known, the ignition timing control device is controlled in the advance angle direction.

When the engine temperature falls below a predetermined value, the bimetal 31 is reversed from the illustrated state to a downwardly curved position, and the valve portion 51 of the second valve means 45 is moved toward the seat 5.
0, the valve portion 53 is seated on the seat 52,
The valve portion 39 of the first valve means is separated from the seat 38 and the valve portion 41 is seated on the seat 40. Then exit 26
is blocked from the inlet 29 and communicates with the inlet 23 to introduce air into the advance side 25 of the servo means. On the other hand, the outlet 20 is cut off from the inlet 23 and communicates with the inlet 17 leading to the intake manifold 15, so that the retard side 19 of the servo means is connected to the negative pressure of the intake manifold in response to the vehicle operating condition, and the ignition timing is set higher than usual. This increases the temperature of the exhaust gas and accelerates the temperature rise time in the thermal reactor.

As described in detail above, in the temperature sensing valve device according to the present invention, the first valve means and the second valve means that operate in response to the reversal operation of the bimetal disk are constructed separately, and one (the second valve means) is configured separately. 2) Since the valve means is provided with a sliding member that can operate relative to the valve portion,
The reversal action of the bimetal has the effect that all valve parts can reliably perform their valve functions.

In other words, even if there is some deviation in the placement position of each valve part corresponding to the amount of reverse movement of the bimetal due to manufacturing or assembly errors, the error will be automatically absorbed by the above-mentioned relative movement. This has the practical effect of providing the desired sealing function and sealing effect.

Incidentally, since the annular member 32 and the member 42 on which the seats 40 and 50 are respectively provided are screwed and fixed to the body, the fixed sheets 38 and 5 are screwed together and fixed to the body.
2 can be adjusted in advance, and since these members 32, 42 are prevented from rotating by the protrusions 35, 44, the adjusted position can be maintained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a temperature sensing valve device showing one embodiment of the present invention and a schematic system diagram of its application, and FIG. 2 is a partially enlarged view of the temperature sensing valve device of FIG. 1. 10... Temperature sensing valve device, 11, 12, 13,
14...Body, 30...First subring, 31
... Bimetal, 33... Rod, 36... 2nd
Spring, 37...first valve means, 38, 40,
50, 52... Sheet, 39, 1, 51, 53...
...Valve portion, 45...Second valve means, 48...Sliding member, 49...Fourth spring, 54...Third spring.

Claims (1)

[Claims] 1 a body having a first passage and a second passage; a bimetal disk that is reversely displaced in response to a sensitive temperature change and biased by a first spring;
a second spring that biases a first valve means having a first valve portion that controls opening and closing of the first passage in a direction opposite to the biasing force of the first spring in response to a reversal operation of the bimetal disk; a second valve means having a second valve portion that controls opening and closing of the two passages;
a third spring that biases the second valve means in a direction opposite to the biasing force of the first spring;
The second valve means includes a sliding member disposed to be slidably in contact with the first valve means and movable relative to the second valve portion, and a sliding member disposed between the sliding member and the second valve portion. If the biasing forces of the first, second, third, and fourth springs are respectively f ₁ , f ₂ , f ₃ , and f ₄ , then f ₁ >f ₂ +f ₃ + f ₄ and a temperature sensing valve device set so that f ₄ > f ₃ .