JPS6140928Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a throttle valve control device when a vehicle turns.

In a conventional carbureted vehicle, when the vehicle turns, the fuel in the float chamber tilts, and depending on the direction of the turn, the fuel may flow out through the fuel passage from the nozzle into the intake passage. If the fuel flows into the intake passage in this manner, the fuel mixture may become too rich due to the fuel flowing out while the vehicle is turning, which may cause the engine to stall. For this reason, conventional measures have been taken such as raising the fuel nozzle, devising the shape of the float to prevent fuel from flowing out, or cutting off the fuel when turning, but all of these measures require complicated mechanisms. Therefore, it is not practical.

The present invention was developed in view of the above circumstances, and aims to propose a throttle valve control device that uses a simple mechanism to prevent engine stalling even if fuel flows out from the nozzle into the intake passage when the vehicle turns. The purpose is The present invention includes a throttle valve drive unit that controls the opening and closing of the throttle valve, a turning sensor that detects the turning state of the vehicle, and a speed sensor that detects that the vehicle is at a certain speed or higher.
Even if fuel leaks from the nozzle when the vehicle turns at a certain speed or higher, the opening of the throttle valve is increased to prevent the engine from stalling.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the throttle valve control device for vehicle turning according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the principle of a throttle valve control device when a vehicle turns according to the present invention. In FIG. 1, a turning sensor 10 is connected to a drive signal generation circuit 12 to send a signal when turning, and a speed sensor 14 is also connected to the drive signal generation circuit 12 and sends a signal when the speed exceeds a certain level. I'm starting to send it. The drive signal generation circuit 12 is connected to send a drive signal to the throttle valve drive section 16, and the throttle valve 18 is controlled to open and close by the drive section 16 based on this signal.

In the present invention configured as described above, when the vehicle turns at a speed higher than a certain speed, the turning sensor 1
0 and the speed sensor 14 are sent to the drive signal generation circuit 12, and then when the signals are sent from both sensors 10 and 14 to the drive signal generation circuit 12, a control signal for the throttle valve is sent to the drive unit 16. send. When a control signal is sent to the drive unit 16, the throttle valve 18 is slightly opened during turning at a certain speed or higher, so that even if fuel flows out from the nozzle, the mixture will not become rich and the engine will continue to run. There is no chance of engine stalling.

FIG. 2 shows a specific structure of an embodiment of the present invention. In Figure 2, air cleaner 2
0 is communicated with an end of an intake passage 22, and the intake passage 22 is further provided with a carburetor 24. The float chamber 26 of the carburetor 24 is
It is located on the right side of the intake passage 22 in the figure, and the fuel in this float chamber 26 flows out into the intake passage 22 through a nozzle 28 . Since the float chamber 26 is located on the right side of the intake passage 22, when the vehicle turns to the right, the liquid level in the float chamber 26 tilts as shown by the liquid level L in FIG. It comes to flow out from the nozzle 28 when turning. Furthermore, a throttle valve 30 is provided in the intake passage 22.
The throttle valve 30 is provided with a connecting rod 32. The intake passage 22 communicates with the combustion chamber of the engine 34, so that air-fuel mixture is supplied to the engine combustion chamber.

A diaphragm device 36 is provided adjacent the rod 32 of the throttle valve 30. The operating rod 38 of the diaphragm device 36 is in a position where it can come into contact with the rod 32, and a spring 42 is disposed within the diaphragm chamber 40 to urge the rod 38 fixed to the diaphragm 39 upward. There is. Therefore, when no negative pressure is applied within the diaphragm chamber 40, the urging force of the spring 42 pushes the rod 38 upwardly into contact with the rod 32, thereby increasing the opening degree of the throttle valve 30. On the other hand, when negative pressure acts within the diaphragm chamber 40,
The rod 38 is attracted downward against the biasing force of the spring 42, thus breaking contact with the rod 32, and the throttle valve 30 maintains its normal opening. The diaphragm chamber 40 is connected to a three-way solenoid valve 46 via a pipe 44, and the diaphragm chamber 40 communicates with the downstream side of the intake passage 22 via a pipe 48 via the three-way solenoid valve 46. Therefore, when the pipe 44 and the pipe 48 communicate with each other by the three-way solenoid valve, the negative pressure within the intake passage 22 acts within the diaphragm chamber 40 . 3
The directional solenoid valve 46 allows the diaphragm chamber 40 to communicate with the intake passage 22 and also with the atmosphere. The three-way solenoid valve 46 includes an ignition switch 52 connected in series with a vehicle battery 50;
Its operation is controlled by a swing switch 54, a speed switch 56, and a clutch switch 58.

The operation of the embodiment of the throttle valve control device according to the present invention constructed as described above during vehicle turning is as follows. First, ignition switch 52,
If any of the swing switch 54, speed switch 56, and clutch switch 58 is open,
The three-way solenoid valve 46 communicates the pipe 44 and the pipe 48,
Communication with the atmosphere side is cut off, and as a result, negative pressure acts within the diaphragm chamber 40, and the rod 38 moves downward against the biasing force of the spring 42, and the contact between the rods 32 and 38 is cut off. Throttle valve 30
maintains normal opening. Next, when the vehicle is turning at a certain speed or higher and the clutch is disengaged, each of the ignition switch 52, swing switch 54, speed switch 56, and clutch switch 58 closes, and the three-way solenoid valve 46 closes. Communication between the pipe 44 and the pipe 48 is cut off, and the pipe 44 comes to communicate with the atmosphere. As a result, since the inside of the diaphragm chamber 40 is maintained at atmospheric pressure, the rod 38 of the diaphragm 36 is moved upward by the urging force of the spring 42 without applying negative pressure, and the rod 32 of the throttle valve 30 is raised to open the throttle. The valve 30 is maintained at an opening slightly larger than the normal idle opening. As a result, while the vehicle is turning, the float chamber 2
6 flows out from the nozzle 28, but the opening of the throttle valve 30 is maintained slightly larger than the idling opening, which prevents the mixture from becoming too rich and eliminates the risk of the engine stalling. .

In the above embodiment, a manual transmission vehicle has been described, but the throttle valve control device during turning according to the present invention can also be applied to an automatic vehicle using a torque converter. That is, a manual transmission vehicle uses a clutch switch 58, but an automatic transmission vehicle requires a timer switch in place of the clutch switch 58.

Next, FIG. 3 shows the structure of the swivel switch. That is, a part of the steering rod 60 is shown in FIG. 3, and the steering rod 60 is supported by an outer case 62 via a bearing (not shown). Further, the outer case 62 is fixed to the vehicle body side by a stay 66 via an elastic member 64. A switch 68 is attached to the stay 66,
Furthermore, a lever 70 is provided in the large diameter portion 63 of the outer case 62 in close proximity to the switch 68. When the steering shaft (not shown) is rotated clockwise during a turn and the steering rod 60 is moved to the right, the outer case 6 supporting the steering rod 60 via the bearing
2 moves in the direction shown by arrow A in FIG. 3 under the reaction force from the vehicle tires, and as a result, the lever 70 comes into contact with the switch 68, and the switch is closed. If this switch 68 is used as a turning switch, it is possible to detect when the vehicle is turning.

4 and 5, the structure of another embodiment of the swivel switch is shown. That is, the fourth
As the schematic structure is shown in the figure, one end 76 of a right-handed coil spring 74 is fixed to a spring holder 72 that rotates integrally with the steering shaft (not shown). The other end 78 of the coil spring 74 is connected to a switch section to be described later. That is, the other end 78 is fixed to an armature 80 constituting the switch portion, and the armature 80 is movable around a fulcrum 84 of the switch body 82. armature 80
A contact 86 is provided on the switch body 82, and a contact 88 corresponding to this contact 86 is also provided on the switch body 82. When the vehicle is now turned to the right, the spring holder 72 rotates clockwise in FIG. 4 together with the steering shaft, and the clockwise rotation of the coil spring 74 causes the armature 8
0 moves and contacts the contact point 88. This allows the turning state of the vehicle to be detected. Note that when the vehicle is rotated to the left, the spring holder 72 rotates counterclockwise together with the steering shaft, so the coil spring 74 rotates to the left. In this case, the armature moves away from the contact point 88, and the There is no possibility that the contact point 88 will touch.

As explained above, according to the throttle valve control device for when a vehicle is turning according to the present invention, a turning sensor that detects when the vehicle is turning and a speed sensor that detects that the vehicle is running at a certain speed or higher are used. The opening of the throttle valve is increased when the vehicle is turning at a certain speed or higher.
Even if fuel flows out from the nozzle while the vehicle is turning, the air-fuel mixture will not become too rich, and as a result, the engine will not stall.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the principle of a throttle valve control device for vehicle turning according to the present invention, FIG. 2 is an explanatory diagram showing the structure of an embodiment according to the present invention, and FIG.
The figure is a front view showing the structure of a swivel switch used in an embodiment of the present invention, FIGS. 4 and 5 are drawings showing other structures of the swivel switch, and FIG. 4 is a front view showing the schematic structure thereof. , FIG. 5 is an enlarged sectional view of the switch section. DESCRIPTION OF SYMBOLS 10... Rotation sensor, 12... Drive signal generation circuit, 14... Speed sensor, 16... Throttle valve drive part, 18... Throttle valve.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A drive unit that controls opening and closing of the throttle valve, a turning sensor that detects the turning state of the vehicle and sends a control signal to the drive unit, and a drive unit that detects that the vehicle speed is above a certain speed. a speed sensor that sends a control signal to the throttle valve drive section, and when the vehicle turns at a constant speed or higher based on the control signals from the turning sensor and the speed sensor, the throttle valve drive section controls the throttle valve drive section. A throttle valve control device when a vehicle turns, which is characterized by increasing the opening degree. (2) A clutch sensor is installed that detects when the clutch is disengaged and sends a throttle valve control signal to the drive unit.If the clutch is disengaged when the vehicle is turning at a certain speed or higher, the throttle valve drive unit A throttle valve control device when a vehicle turns as claimed in claim 1, characterized in that the opening degree is increased. (3) A neutral sensor is provided that detects that the shift lever is in the neutral position and sends a control signal to the throttle valve drive unit, and based on the signal from the neutral sensor, the shift lever is in the neutral position when the vehicle is turning at a certain speed or higher. 2. The throttle valve control device for when a vehicle turns as claimed in claim 1, wherein the throttle valve driving section increases the opening degree of the throttle valve when the throttle valve is in the position. (4) It has a torque converter as a transmission and a timer section, and after the throttle valve opens when the vehicle turns at a certain speed or higher, the drive section of the throttle valve temporarily opens the throttle based on the signal from the timer section. A throttle valve control device when a vehicle turns as set forth in claim 1, characterized in that the valve is returned to its original opening degree.