JPS59155544A - Apparatus for operating throttle valve used for controlling quantity of intake air of engine - Google Patents

Abstract

PURPOSE:To improve the performance of an engine, by employing such an arrangement that secondary throttle valves opened simultaneously when the opening of a primary throttle is small are disabled to open at the time of fast-idling operation in operating the throttle valves provided in each of a plurality of intake passages mechanically in two stages. CONSTITUTION:Valve shafts 6, 7 for a primary throttle valve 4 and secondary throttle valves 5 disposed respectively in on primary intake passage 2 and two secondary intake passages 3 are extended in parallel to each other. Two arms 8, 9 and a fast-idle lever 10 are fixed to the valve shaft 6 with proper intervals from each other, and a hot-starting level 13, an auto-cruise lever 14, a link lever 15 and a throttle valve 16 are carried on the valve shaft 6 in a freely rotatable manner. The levers 13, 14, 16 are energized to the starting position respectively by coil springs 17, 18, 19. On the other hand, a secondary arm 25 is fixed to the valve shaft 7 for the secondary throttle valves 5 and connected to the link lever 15 via a link 26. The link lever 15 is turned when the primary throttle valve 5 is opened to a prescribed angle and the auto-cruise lever 14 is turned.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly used to control the amount of intake air in an engine by mechanically operating a throttle valve provided in each of a plurality of intake passages in two stages to control the amount of intake air sent to an automobile engine. This invention relates to a throttle valve actuating device.

A venturi is installed upstream of the throttle valve in the intake passage to generate negative pressure according to the amount of intake air, and a supercharger is installed at the inlet of the carburetor that sucks out fuel, mixes it with the intake air, and sends it to the engine.
Or, for those that inject pressurized P into the intake passage and mix it with the intake air before sending it to the engine, the primary throttle valve opening is small due to the large amount of intake air compared to a normal intake type carburetor. Sometimes the secondary throttle valve must be opened.

In addition, during warm-up operation (fast idle state) following a cold start or warm start (during hot start assist), only the secondary throttle valve must be open and the secondary throttle valve must be closed.

Conventionally, devices that mechanically operate throttle valves provided in each of a plurality of intake passages in two stages operate the secondary intake passage when the primary throttle valve, which opens and closes the secondary intake passage, opens approximately 45° to 55°. The structure is such that the high-speed performance of the automobile is satisfied only when the secondary throttle valve that opens and closes begins to open. On the other hand, in the above-mentioned case where there is a requirement to open the secondary throttle valve quickly when the car starts traveling, the secondary throttle valve is opened when the -second throttle valve opens approximately 5Q to 25 degrees. There is a need. Therefore, if the conventional mechanical two-stage actuator is used as is, it is impossible to open the secondary throttle valve early, but if the configuration is designed to allow the early opening of the 9-inch secondary throttle valve, it will cause a fast idle. This may cause an inconvenience in that the secondary throttle valve opens in the primary throttle valve opening range during a warm start.

Early opening of the secondary throttle valve when the vehicle is running is not limited to cases where the driver manually operates the throttle valve by pressing the accelerator pedal, but also applies to vehicles equipped with automatic driving systems.
This is also necessary when automatically driving at a specified constant speed (auto cruising).

As mentioned above, the present invention aims to provide an operating device for a throttle valve for engine intake valve control that can accurately perform different opening operations of a secondary throttle valve, which was previously considered impossible. It is what was done.

Namely, in order to achieve the above object, the operating device according to the present invention includes a warm start lever, an auto-cruise lever, and an interlocking lever on the throttle valve shaft.

The throttle valve lever is supported to rotate freely, and the fast idle lever and two arms are fixed.The warm start lever pushes the first arm and rotates the primary throttle valve in the opening direction, and the auto cruise lever When one of the arms is pressed, the throttle valve lever pushes the second arm to rotate each primary throttle valve in the opening direction, and when the opening is small, the interlocking lever is pressed to rotate the secondary throttle valve in the opening direction. It is characterized by being configured as follows.

Next, a specific example of the present invention will be explained based on the drawings.
A primary throttle valve 4 and a secondary throttle valve 5.5 are provided with one primary intake passage 2 and two secondary intake passages 3.3 to control the area of each passage, and the primary throttle valve shaft 6 is parallel to each other. and the secondary throttle valve shaft 7, respectively.

- At one end of the throttle valve shaft 6 protruding from the main body 1 is a first arm 8. A second arm 9° fast idle lever 10 is fixedly supported at intervals, and a metal lla,
11b, 11c, and sleeves 12a, 12b, 12c, and 12 that are rotatably fitted to the primary throttle valve shaft 6 while sandwiching the lid.
d, warm start lever 13, auto cruise lever 14.
An interlocking lever 15° and a throttle valve lever 16 are fixed respectively, and a warm start lever 13. The auto cruise lever 14 and the throttle valve lever 16 are actuated by coiled springs 17, 18 and 19 which act to return them to the starting position.

The warm start lever 13 is connected to the prime mover by a freely rotatable auxiliary lever 20 provided at its tip and a wire (not shown), and the prime mover is operated only when the engine temperature is above a certain level and the engine is started, and the wire is pulled and the wire is pulled. It is rotated clockwise. First claw 8a of first arm 8
9. is in contact engagement with this warm start lever 13. When the warm start lever 13 rotates, it pushes the pawl 8a and rotates the first arm 8 and the primary throttle valve @6 together, and the -second throttle valve 4 is rotated.
is opened to a range of 15° to 2o0.

The fast idle lever 10 has a roller 21 at the tip,
It is in contact with the stepless cam ridge 23 of the cam 22. Cam 22
rotates following an operating rod 24 that reciprocates in a straight line depending on the temperature of the engine or its surroundings; when the temperature is low, the operating rod 24 moves downward in FIG. 7 and rotates the cam 22 counterclockwise in the figure. and fast idle lever 1.
0 and the primary relief valve shaft 6 are rotated together clockwise to widen the opening degree of the primary throttle 9 valve 4. As the temperature rises, the operating rod 24 moves upward to reduce the opening degree of the primary throttle valve 4.

It has a fully automatic choke function that automatically reduces the opening of the throttle valve even if it is left to warm up.

The operating rod 24 is driven by, for example, a reversible thermal expansion material that expands greatly as the temperature rises.

The auto cruise lever 14 is connected to the prime mover by a wire (not shown), and when the driver specifies a certain speed for automatic driving, the prime mover pulls the wire in accordance with the specified speed, so that the auto cruise lever 1 is activated.
4) Rotate clockwise by an angle corresponding to the specified speed as shown in Figure 4.1. Push the second claw 8b of the first arm 8 that is in contact with the first claw 14a to rotate the first arm 8 and the primary throttle valve shaft 4 together to open the primary throttle valve 51ft. let - When the auto cruise lever 14 further rotates after the throttle valve 5 has been opened by approximately 5° to 25°, its second pawl 14b is interlocked and comes into contact engagement with the first pawl 15a of the Z-15. Then, the interlocking lever 15 is rotated clockwise in FIGS. 4 and 5.

The interlocking lever 15 is connected by a link 26 to a secondary arm 25 fixed to the shaft end of the secondary throttle valve shaft 7, and begins to open the secondary throttle valve 5 when it starts rotating as described above.

Therefore, the secondary throttle valve 5 is opened early during automatic driving.

The throttle valve lever 16 is connected to the accelerator pedal by a wire (not shown), and when the driver depresses the accelerator pedal, the throttle valve lever 16 rotates clockwise in FIG. 5.6 and comes into contact with its first pawl 16a. The engaged claw 9a of the second arm 9 is pushed to rotate the second arm 9 and the primary throttle valve shaft 6 clockwise together to open the primary throttle valve 4. −
Next, when the throttle valve 4 opens in the range of about 5° to 25°, the second pawl 16b of the throttle valve lever 16 comes into contact with the second pawl 15b of the interlocking lever 15 to move the interlocking lever 15 to the fifth position. Rotate the figure clockwise.

Link 26. The secondary throttle valve 5 begins to open via the secondary arm 25.

In other words, the secondary throttle valve 5 is opened early even when the vehicle is operated manually.

- The first arm 8, which is fixed to the throttle valve shaft 6, is connected to the warm start lever 13. The second arm 9 is pushed by the auto cruise lever 14 and rotated, and the second arm 9 is pushed by the throttle valve lever 16 and rotated.

Advantageously, since the interlocking lever 15 is rotated by being pushed by the auto cruise lever 14° and the throttle valve L/cover 6, there is no problem of interfering with each other when the above-mentioned operations are performed.

Of course, the auto cruise lever 14 may also be rotated by pushing the second arm 9.

be. In addition, the fast idle lever 10 is not directly fixed to the primary throttle valve shaft, but is connected to the first operating rod 24 and the cam 22.
It may be fixed to the primary throttle valve shaft 6 via a mounting position adjustment mechanism so that fine adjustment can be made depending on the positional relationship with the primary throttle valve shaft 6.

As described above, according to the present invention, a fast idle lever and two arms are fixed to the throttle valve shaft, and the fast idle lever provides the necessary brake force during fast idle.
This device provides a predetermined primary throttle valve opening degree and pushes the first arm by a warm start lever freely supported for two rotations to give a predetermined primary throttle valve opening degree necessary for a warm start,
At this time, the second arm rotates away from the contact engagement position with the throttle valve lever, interlock lever, and auto cruise lever, so the secondary throttle valve does not open and the engine is connected only to the secondary intake path. It sends air. In addition, the auto cruise lever is used to press either arm, and the throttle valve lever is used to press the second arm to open the primary throttle valve, and the upper arm to press the interlocking arm to open the secondary throttle valve. A large amount of air can be supplied to the engine by setting the valve opening timing arbitrarily, and at this time, the arm rotates away from the contact engagement position with the warm start lever, and the fast idle lever comes into contact engagement with them. This allows the valve opening operation to be performed without any hindrance.

That is, according to the present invention, when mechanically operating the throttle valves provided in each of the plurality of intake passages in two stages, the opening of the primary throttle valve can be controlled both when operated manually and when running automatically. The secondary throttle valve starts opening when the engine temperature is low, but it is possible to selectively open only the primary throttle valve during fast idle and JP warm start.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a specific example of the present invention, and FIG. 2 is a vertical view of the primary throttle valve shaft portion! 1 side view, Figure 3 is an enlarged view of Figure 1 seen from the left, Figure 4. Figures 5 and 6 1. FIG. 7 is the A-A line in FIG. 1. It is an enlarged sectional view taken along B-Blfil, C-C line, and D-D line. 2...-Primary intake passage, 3...Secondary 1st slope airway, 4...-Secondary throttle valve, 5...Secondary throttle valve, 6... ...-Secondary throttle valve shaft, 7...Secondary throttle valve shaft, 8...First arm, 9...
Second arm, 10...Fast idle lever, 13...Warm start lever, 14...-
... Auto cruise lever, 15 ... Interlocking lever, 16 ... Throttle valve lever. Agent Mutsuaki Nozawa Figure 1, Figure 6

Claims (1)

[Claims] The warm start lever, auto cruise lever, interlocking lever, and throttle valve lever are rotatably supported on the primary throttle valve shaft, and the Fanuto idler lever and two arms are fixed, and the warm start lever supports the first arm. Press to rotate the primary throttle valve in the opening direction, press either arm of the auto cruise lever, and press the second arm of the throttle valve lever to rotate each primary throttle valve individually in the opening direction, and the opening degree is small. 1. An operating device for a throttle valve for engine intake air amount control, characterized in that the secondary throttle valve is rotated in the opening direction by pressing an interlocking lever.