JPH0318674Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a structure for preventing modification of the maximum speed control system of a vehicle equipped with a supercharged engine in which a supercharger such as a turbocharger supercharging blower is placed upstream of a two-barrel type carburetor. .

The maximum speed of cars equipped with a supercharged engine is greatly increased by the action of the supercharger, but on the other hand, considering Japan's traffic conditions and driver safety, achieving extremely high speeds is not desirable. Therefore, a maximum speed control system is incorporated into the engine so that the engine speed automatically decreases when the engine speed exceeds a predetermined high speed. For example, JP-A-54-
In what is published in Publication No. 35516, the action of the supercharging blower or exhaust turbo of the turbocharger is reduced when the vehicle speed exceeds a predetermined speed,
Maximum speed is limited.

The present invention relates to a maximum speed control system for a vehicle equipped with a supercharged engine that has a two-barrel type carburetor placed downstream of the supercharger. When the vehicle speed exceeds a predetermined speed, a diaphragm actuator is provided that opens the secondary throttle valve, and when the vehicle speed reaches a predetermined speed or higher, the actuator of the boost pressure This relates to a system equipped with a control valve that cuts off the introduction of

In the above system, a control valve connected to a speedometer etc. functions to cut off supercharging pressure from being introduced into the diaphragm actuator when the vehicle speed exceeds a predetermined speed, and the secondary throttle valve is kept open. The valve is switched to the closed state to reduce the amount of fuel supplied to the engine body, lowering the output, and restricting the vehicle speed from exceeding a predetermined speed.

Drivers who are dissatisfied with the fact that the maximum speed of a vehicle equipped with such a system is limited to a fixed speed may modify it and attempt to drive the vehicle at excessive speeds, ignoring traffic conditions.
The purpose of the present invention is to prevent such modifications and improve driver safety.

In order to achieve the above-mentioned object, the present invention provides a pressure introduction pipe having two protruding ring parts provided on the pressure introduction side of the actuator so as to connect the tip of the hose connecting the actuator and the control valve to the pressure introduction pipe. The actuator has a circumferential portion that can be contracted in diameter, and further has a circumferential portion that can be contracted in diameter from an intermediate position between the two protruding ring portions to a side surface on the actuator side of the protruding ring portion on the actuator side. The hose is held under pressure between the circumferential portion of the clip and the pressure introduction pipe portion by a clip whose side circumferential edge is bent radially inward and a protrusion is provided at the bent portion; The distal end portion of the hose is locked and fixed to the pressure introduction pipe portion by locking the protrusion to the actuator-side side surface of the protruding ring portion located on the actuator side. With this structure, the tip of the hose is elastically compressed, and its inner periphery is deformed and tightly attached to the pressure introduction pipe part under pressure, creating a step in the circumference of the hose in front and behind each of the two protruding ring parts. Furthermore, the protrusion of the bent part formed on the circumferential edge of the clip on the actuator side engages with the actuator-side side surface of the protruding ring part on the actuator side, so it is securely engaged and fixed to the pressure introducing part. . Furthermore, the radially inward bent portion provided on the actuator side circumferential edge of the clip can greatly increase the radial rigidity of the clip, so once the clip has been strongly tightened radially inward, it is possible to This makes it extremely difficult to remove the hose, and from this aspect as well, the hose can be securely locked and fixed. As a result, the hose cannot be easily removed from the actuator, a short circuit between the pressure outlet and the actuator is prevented, and the opening and closing movements of the secondary throttle valve are always under the control of the control valve. I can do it.

The present invention will be specifically described below based on embodiments shown in the drawings.

The intake system of the supercharged engine includes, from the upstream side to the downstream side, an air cleaner (not shown), a supercharging blower 2 of the turbocharger 1, a surge tank 3, a two-barrel type carburetor 4, an intake manifold 5, and an engine body 6. An intake port 7 is arranged. On the other hand, an exhaust port 8, an exhaust manifold 9, an exhaust turbine 10 of the turbocharger 1, and a muffler (not shown) are arranged in the exhaust system of the supercharged engine from the upstream side to the downstream side.

The primary passage 11 of the carburetor 4 is provided with a choke valve 12, a primary throttle valve 13, etc., while the secondary passage 14 is provided with a secondary throttle valve 15, etc. The primary throttle valve 13 always opens and closes in conjunction with an accelerator pedal (not shown), but the secondary throttle valve 15 opens and closes when the supercharging pressure from the supercharger 2 exceeds a predetermined pressure. Opening for the first time. By opening the secondary throttle valve 15, the amount of fuel sucked into the intake passage in the carburetor increases, improving the engine output and increasing the vehicle speed.

A pressure introduction port 16 is provided upstream of the primary throttle valve 13 in the primary side passage 11, and is connected to a diaphragm actuator 18 via a pressure introduction passage 17.

A control valve 19 consisting of an electromagnetic three-way switching valve is disposed in the middle of the pressure introduction passage 17. Further, a delay device 20 with a check valve is disposed between the control valve 19 and the pressure introduction port 16 to prevent the supercharging pressure introduced into the pressure introduction port 16 from suddenly acting on the actuator 18. are doing.

The actuator 18 is connected to the pressure introduction passage 1
When the pressure chamber 21 that communicates with
2, and at this time, the secondary throttle valve 1 is connected via an operating rod 23 connected to the diaphragm 22.
5 is configured to rotate in the valve opening direction. 24 is an atmospheric chamber, and 25 is a return spring.

The control valve 19 is normally connected to the pressure introduction passage 17.
The solenoid 2 is kept open, but
6 is excited, it switches so that the atmosphere opening passage 27 and the pressure chamber 21 of the actuator 18 are communicated with each other. The solenoid 26 is electrically connected to a speedometer 28 of the automobile, and the solenoid 26 is energized when the speedometer 28 indicates a predetermined speed or higher. Thus, when the vehicle speed reaches the predetermined speed or higher, the pressure chamber 21 becomes atmospheric pressure, the diaphragm 22 is returned to its original position by the action of the return spring 25, and the secondary throttle valve 15 is closed. Return to position. Therefore, as described above, the output of the engine is suppressed and the vehicle speed is also limited to below the predetermined speed.

In the present invention, the tip 3 of the hose 29 connecting the actuator 18 and the control valve 19 is
0 is attached to the actuator 18 using a clip 32.

The clip 32 shown in FIGS. 2 to 4 is made by punching a metal plate into the shape shown in FIG.
It is formed by bending along the dotted chain line as shown in FIG. A radially inward bent portion 31 provided on the actuator side circumferential edge of the circumferential portion 34 of this clip 32 includes a serrated protrusion (protrusion) 33,
33... has been established. Tip 3 of the hose 29
0 has two protruding ring parts 36, 3 as shown in FIG.
7, and the ear portions 35, 35 of the clip 32 are brought close to each other as shown by the arrows in FIG.
The circumferential portion 34 is attached to the pressure introduction pipe portion 38 by reducing its diameter. At this time, the serrated protrusions 33, 33, .
As a result, the hose tip 30 is elastically compressed, and its inner periphery deforms and comes into close contact with the pressure introducing pipe portion 38 under pressure, creating a step on the inner periphery of the hose in front and behind the two protruding ring portions 36 and 37, respectively. , the hose 29 is reliably engaged and fixed to the pressure introduction pipe section 38. Furthermore, the bent portion 31 can greatly increase the rigidity of the clip 32 in the radial direction, so that once the clip 32 is strongly tightened radially inward, it becomes very difficult to remove the clip 32. Also from this point of view, the hose 29 can be securely locked and fixed. As a result, the hose 29 cannot be easily removed from the actuator 18.

The main body 29a of the hose 29 is made of an easily cutable material such as rubber, while the main body 29a is equipped with a metal mesh 39 such as a stainless steel mesh.
It is cloaked. This prevents the hose 29 from being cut and prevents the actuator 18 and the pressure introduction port 16 from being short-circuited without going through the control valve 19.

The clip 32 shown in FIGS. 5 to 7 is made by punching a metal plate into the shape shown in FIG.
It is formed by bending along the dotted line as shown in FIG. This clip 32 has a bent portion 31 with serrated protrusions 33, 33, . . . similar to those shown in FIG. Sashiko 41, 41...
... is provided to form the biting part 40. Using this clip 32, the tip 30 of the hose 29 is connected to the pressure introduction pipe portion 3 of the actuator 18.
8, as shown in FIG. 5, the biting part 40 bites into the hose 29 between the two protruding ring parts 36, 37, and the bent part 31 and the serrated protrusions 33, 33... Coupled with the locking and fixing action of..., it is possible to reliably prevent the hose 29 from being removed from the actuator 18. Although the hose 29 shown in FIG. 5 is not covered with the metal mesh 39, the same hose as shown in FIG. 2 may be used.

According to the present invention, the tip of the hose connecting the actuator and the control valve is firmly attached to the pressure introduction pipe portion of the actuator having two protruding ring portions by the clip having the bent portion and the protrusion. Once the clip is tightened, it is very difficult to remove the clip due to its large radial rigidity. This prevents the pressure outlet from being easily removed from the actuator, prevents a short circuit between the pressure outlet and the actuator, and ensures that the opening and closing movements of the secondary throttle valve are always under the control of the control valve, thereby achieving maximum speed. Modification of the control system can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a portion of its main parts, Fig. 3 is a developed view of the clip, Fig. 4 is a perspective view of the clip, and Fig. 5. 6 is a partially longitudinal sectional view of a main part of another embodiment of the present invention, FIG. 6 is a developed view of the clip, and FIG. 7 is a perspective view of the clip. 2...Supercharger, 15...Secondary throttle valve, 17...Pressure introduction passage, 18...Diaphragm actuator, 19...Control valve, 29...
... Hose, 30 ... Tip of hose, 31 ... Bend part, 32 ... Clip, 33 ... Protrusion, 36,
37...Protruding ring part.

Claims (1)

[Scope of utility model registration request] The vehicle has a diaphragm actuator that opens a secondary throttle valve when the supercharging pressure from the supercharger exceeds a predetermined pressure, and a pressure introduction passage that guides the supercharging pressure to the actuator allows the vehicle speed to exceed a predetermined speed. In a vehicle equipped with a supercharged engine, which is equipped with a control valve that cuts off the introduction of the supercharging pressure to the actuator, the tip of a hose that connects the actuator and the control valve is provided on the pressure introduction side of the actuator. The diameter can be reduced by fittingly connecting to the pressure introducing pipe portion having two protruding ring parts, and further surrounding the range from the intermediate position of the two protruding ring parts to the side surface of the actuator side protruding ring part on the actuator side. A clip having a circumferential portion, a circumferential edge of the actuator side of the circumferential portion bent inward in the radial direction, and a protrusion provided on the bent portion allows the hose to be connected to the circumferential portion of the clip and under pressure. While holding the pressure between the introduction pipe and the
A vehicle equipped with a supercharged engine, characterized in that the tip of the hose is locked and fixed to the pressure introduction pipe by locking the protrusion to a side surface on the actuator side of a protrusion located on the actuator side. A structure to prevent modification of the maximum speed control system.