JPH04123338U - Idle speed controller for starting, warming up, and idle up - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a multifunctional idle speed controller by combining the starting mixture opening/closing in the carburetor, the float chamber ventilation switching, and the warm-up correction device with the idle speed controller. [Configuration] Valve (20) that opens and closes the starting mixture passage
, a valve (70) that switches between an outer air vent and an inner air vent, and a valve (5) that performs fuel correction during exploration are engaged with the idle speed controller rod (2) of the diaphragm actuator, and each valve is connected to the engine. This is linked to the displacement of the idle speed control rod as the engine operates. [Effect] Multifunctional idle speed control,
It is possible to reduce the number of parts, reduce costs, and downsize the unit.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a carburetor idle speed controller.

0002

[Conventional technology]

When the engine is not yet warm enough, it will run faster than normal idling. If the engine is not operated at high rotational speed, the engine will stall. For this reason, first-eyed A device that adjusts idling during warm-up to the appropriate engine rotation speed to match the warm-up state. I'll keep it high.

0003 i.e. carburetor throttle to prevent stalling while engine is cold Increase the valve opening to a level greater than normal idling and allow the engine to warm up. gradually reduce the throttle valve opening, and when the engine returns to normal operation, Automatically lowers the throttle valve opening to maintain normal idling speed. It is.

0004 Fast idle determines the warm-up time of the engine, and the faster it is turned, the warmer it is. It doesn't take much time, but if you go too fast you may damage the engine. The choke valve is used for starting and warming up in cold weather, but if you forget to return it, it can damage the exhaust system. This may cause the temperature to rise or the engine speed to rise too high. For this reason, an electromagnet can be used to When the choke valve is opened and the electromagnet is de-energized due to water temperature detection, the return spring A wax actuator that automatically returns to the original position or a wax actuator that detects the cooling water temperature. to change the throttle valve opening in conjunction with the opening and closing of the choke valve. A lot of things are used.

[0005]

[Problem that the idea aims to solve]

In the case of automatic return devices using electromagnets and return springs, choke valves are used. Since the throttle valve is only linked to the opening and closing of the throttle valve, the Idle speed cannot be directly controlled. Also wax actuator If the type choke valve and throttle valve are linked together, wax deterioration may cause Changes in fast idle opening and devices that engage the wax actuator This causes deterioration of the choke valve.

[0006] On the other hand, the diaphragm actuator is activated by controlling the stroke of the leak lever. actuate the required air amount or required throttle valve opening. It is known to install an idle speed controller like this, but This type of controller is based on engine water temperature sensing, so it is It had nothing to do with controlling when the dollar was up, and had only a limited function. Also However, in order to make this multi-functional, the number of parts increases, leading to high costs. It was.

[0007] This invention features opening and closing of the starting air-fuel mixture in the carburetor, switching of float chamber ventilation, and warm-up. Idle speed control by combining a correction device with an idle speed controller The aim is to make the controller multi-functional.

[0008]

[Means to solve the problem]

In order to achieve the above object, the present invention includes a valve that opens and closes a starting mixture passage; Valve that switches between outer air vent and inner air vent, and fuel correction during warm-up The idle speed control of the valve and the diaphragm actuator The idle speed controller engages the rod and controls each valve as the engine operates. It is characterized by being linked to the displacement of the troller rod.

[0009]

[Effect]

The cut valve and ball vent valve in the starting passage operate at the same time as the engine fully explodes. The state changes from ON to OFF in conjunction with the idle speed controller rod. It operates. Even at full throttle and low speed, the idle speed controller rod The start cut valve and The ball vent valve and ball vent valve do not return, and both valves are ON only when the engine is OFF. Return to state. The warm-up compensation valve is an idle speed controller that changes depending on the temperature. Directly moves with the troller rod to control fuel. In addition, the rod stroke control device , when the atmosphere is introduced into the upper chamber of the diaphragm by turning on the solenoid, the leak valve Move the free lever that holds down the idle speed until the specified throttle opening is reached. The controller rod is activated.

0010

【Example】

Figure 1 is a cross-sectional view of the fast idle controller of the present invention, and the carburetor body is Illustration is omitted.

[0011] Insert the idle speed controller rod 2 into the housing 1 and Install the leak valve 4 of the idle up device 3 at the tip and the warm-up correction valve 5 at the rear end. Let's go. The rod 2 is engaged with the unloader 6 of the carburetor near the leak valve 4. An engaging piece 7 is provided, and a long groove 8 is provided near the engaging piece 7, into which a fixing pin 9 is inserted. Also, Howe Insert the outer/inner air vent switching button across the insertion hole 10 formed in the ring 1. It is also possible to arrange the valve vent valve 70 and the start cut valve 20 on the rod 2. The first and second arms 11 and 12 are attached to the middle of the valves 70 and 20. The valve shafts 21 and 22 are brought into contact with the arms 11 and 12, respectively. In the diagram, 25 is warm The needle valve of the machine correction valve 5, 26 is a lever attached to the rear end of rod 2, and 27 is An adjustment screw provided at the tip of the lever 26 to make it contact the top of the needle valve 5 28 is a warm-up correction fuel passage, 29 is a starting mixture passage, 30, 31, 32 are the airphone, float chamber and canster ports of the ball vent valve 70, 34 is a lever that connects the throttle shaft 14 and the unloader 6.

0012 Furthermore, a rod stroke control device 3 is formed at the tip of the housing 1. Ru. A diaphragm 35 is provided inside the housing 1 in this part to connect the atmospheric chamber 36 and the negative It is divided into pressure chambers 37. A storage chamber 38 is provided inside the large diameter portion 2a of the rod 2, and a storage chamber 38 is provided inside the large diameter portion 2a. - Retract the leak valve 4 and use the spring 39 to always force the leak valve 4 to move to the right. Give. The chamber 38 has a small hole 40 that communicates with the atmospheric chamber 36, and the chamber 38 has a small hole 41 that communicates with the atmospheric chamber 36. and 42 form a communication section between the atmospheric chamber 36 and the negative pressure chamber 37. rod large The leak valve tip 4a protrudes from the small hole 42 on the end face of the diameter portion 2a and enters the negative pressure chamber 37. The free lever 45 supported on the shaft 43 is brought into contact with the free lever 45. At the bottom corner of housing 1 A hot water passage 46 is provided to fill the engine cooling water, and a bypass pipe is installed near the hot water passage 46. Install metal 47. The cam 49 is fixed to the bimetal shaft 48 and the free lever 4 5 in contact with the follower section 50 of No. 5. In addition, 51 in the figure is a diaphragm spring, 52 is an intake pipe or negative pressure inlet, 53 is a bimetallic pressure regulating spring, and 54 is a large It is an air vent hole.

[0013] In the above device, when negative pressure is introduced into the negative pressure chamber 37, the diaphragm 35 operates. In order to move rod 2 to the right by the movement, the slot attached to the throttle shaft is Rotate the torque valve clockwise to open it. Temperature control of the valve opening Bimetal 47, cam 49, free lever 45, negative pressure chamber 37 and atmospheric chamber This is done using the leak valve 4 provided in the communication section 36. Bimetallic depending on water temperature changes 47 is displaced. In other words, when the engine is cold, the bimetal 47 and the free lever 45 is in the solid line state in Figure 1, so rod 2 is moved to the right several times by introducing negative pressure. Open the throttle valve repeatedly. Bimetal 47 contracts as water temperature rises. , by slightly tilting the free lever 45 counterclockwise via the cam 49, When the leak valve 4 is pressed, the atmospheric chamber 3 passes through the small hole 40, the storage chamber 38, and the small hole 42. 6 and the negative pressure chamber 37 communicate with each other, and the diaphragm 35 descends (moves to the left). Also, the temperature is low When the bimetal 47 returns to its original shape and touches the tip of the leak valve, the die will close. Afram 35 rises (to the right). Due to this balance, the position of bimetal 47 The diaphragm 35 is displaced accordingly, and the throttle valve lever engages with the rod 2. operates to determine the opening degree of the slot valve.

[0014] In the apparatus of FIG. 1, a cut valve 20 and a ball vent valve 70 in the starting passage is connected to idle speed controller rod 2, which operates at the same time as the engine completes. It operates from the ON state to the OFF state. Idle even at full throttle and low speed The speed controller rod 2 is maintained above the idle position by the unloader 6. The starting cut valve 20 and ball vent valve 70 cannot be returned. Both valves return to the ON state only when the engine is turned off. The warm-up correction valve 5 , fuel control works in conjunction with an idle speed controller rod that moves according to temperature. I will do the same. In addition, the rod stroke control device 3 allows atmospheric air to be introduced into the upper chamber of the diaphragm. When the leak valve is turned on, move the free lever that holds the leak valve and open the throttle to the specified level. The idle speed controller rod operates until the

[0015] To summarize the above movements, when the engine is stopped, the rod 2 is moved to the left end (OF F), the ball vent valve 70 is connected to the float chamber canster port, and the ball vent valve 70 is located at The dynamic cut valve 20 is in the ON state. When the engine is running, the position of rod 2 is The valve 70 is determined by the bimetal (idle ID opening degree or more), and the valve 70 is connected to the float chamber. -The air horn port is in communication and the starting cut valve 20 is in the OFF state.

[0016] FIG. 2 shows another embodiment of the invention. In the case of Figure 2, the idle speed control The arms 11 and 12 are integrally formed above and below the center of the rod 2 of the controller, and the first arm Connect the tip of the valve 11 to the valve shaft 21 of the outer/inner air vent switching valve 70 and the starting While making contact with the valve shaft 22 of the cut valve 20, the tip of the second arm 11 is placed on the lever. -15 in contact with one end. The other end of the lever 15 is connected to a cover attached to the throttle shaft 14. 16. Adjustment screw 17 near the base of second arm 12 is provided, and the tip of the screw 17 is connected to the opening of the throttle valve. facing the upper end of the card 6.

[0017] Also, the temperature at one end of rod 2 of the idle speed controller (the left end in Figure 2) The machine correction valve 5 has the same configuration as in FIG. 1, but the rod stroke control device 3 at the other end does not use a diaphragm in the leak valve location and uses a negative instead of a wound bimetal. A pressure operated valve is used. That is, as shown on the right side of FIG. A communication hole 56 is made in the wall between the atmospheric chamber 36 and the negative pressure chamber 37 inside the is opened and closed by a free lever 55 provided on the negative pressure chamber 37 side. There is no free air inside the negative pressure chamber 37. A leaf spring 57 is provided that always biases the lever 55 in the hole closing direction. Negative pressure chamber 3 A negative pressure operating valve 58 is provided at the corner of the free lever 55, and its valve shaft 59 is abut against the rear end of the Negative pressure chamber 37 of the housing and right chamber of the negative pressure operated valve 58 60 is connected to the manifold negative pressure via throttles 61 and 62, and is also a negative pressure operated valve. The right chamber 60 of 58 communicates with the atmosphere via a solenoid 63. The device shown in FIG. 2 also performs the same function as that shown in FIG.

[0018] As mentioned above, the present invention includes a valve that opens and closes the starting mixture passage and an outer air vent. A valve that switches between air vent and inner air vent, and a valve that performs fuel correction during warm-up. engage the idle speed controller of the diaphragm actuator. and adjust each valve to the idle speed controller rod as the engine operates. Since it is linked to displacement, the idle speed controller can be multi-functional. be able to. In addition, regardless of its multi-function, we also offer idle speed controller units. It is possible to realize miniaturization, reduce the number of parts, and reduce costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the idle speed controller of the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment of the present invention.

[Explanation of symbols]

1 housing 2 rods 3 Rod stroke control device 4 Leak valve 5 Warm-up compensation valve 6 Unloader 7 Engagement piece 8 long groove 9 pin 10 Insertion hole 11 First arm 12 Second arm 14 Throttle axis 15 Lever 16 cam 17 Adjustment screw 20 Start cut valve 26 Lever 27 Adjustment screw 28 Warm-up compensation fuel passage 29 Starting mixture passage 34 Lever 35 diaphragm 36 Atmospheric chamber 37 Negative pressure chamber 45 Free lever 46 Hot water passage 47 roll bimetal 48 Bimetal shaft 49 cam 50 Follower part 55 Lever 56 holes 57 Leaf spring 58 Negative pressure operated valve 59 Valve stem 60 Right ventricle 61 Aperture 62 Aperture 63 Solenoid 70 Ball vent valve

Claims (1)

[Scope of utility model registration request] [Claim 1] A valve (2) that opens and closes the starting mixture passage.
0), a valve (70) that switches between an outer air vent and an inner air vent, and a valve (5) that performs fuel correction during warm-up are engaged with the idle speed controller rod (2) of the diaphragm actuator to control each valve. An idle speed controller for starting, warming up, and idling up, characterized in that this is linked to the displacement of an idle speed control rod as the engine is operated.