JPS58155260A - Electronic control type fuel control device for auto-bicycle - Google Patents

Abstract

PURPOSE:To perform an optimum control over a wide operating range by providing an actuator for controlling a feed fuel quantity in the fuel system of a variable venturi type carburetor and by controlling this actuator by a computer in accordance with the outputs of operating condition detectors. CONSTITUTION:The intake air from an air cleaner 1 is mixed with the fuel in a variable venturi type carburetor 2 and the mixed gas generated is fed to an engine 3. According to this constitution, an actuator 11 consisting of a proportional solenoid, etc. is driven for the low speed fuel system 14 of the carburetor 2. The actuator 11 is turned on or off by the output signal from a computer 10 so as to control the air quantity introduced into the low speed fuel system 14. The computer 10 is fed with output signals from an intake air temperature sensor 4, atmospheric pressure sensor 5, engine temperature sensor 6, intake pressure sensor 7, rotation detection sensor 8 and throttle valve aperture sensor 9 to control the operation of the actuator 11.

Description

[Detailed Description of the Invention] The present invention relates to a fuel system for a motorcycle using a venturi venturi fuel pump, which saves fuel consumption while maintaining the drivability and output characteristics of a motorcycle as before. An electronically controlled fuel control device with good starting durability, low buffiness, and good exhaust scum characteristics.

Conventional electronically controlled fuel control systems are beginning to become known for general four-wheel passenger cars, but there are no known examples using an 0T variable ventilate type carburetor.

Most carburetors for motorcycles, including the Amar type, use a variable venturi type carburetor. this is,
Due to the special electric power required for motorcycles, they are required to have high output and good lifting speed, and for this reason, the bore diameter is generally increased and the venturi diameter is also larger than that for general four-wheeled vehicles. . Based on this percentage, the fuel consumption was high and the exhaust gas performance was also poor. -Noj1en! #+ Injection type electronically controlled fuel control devices have been considered and put into practice, but motorcycle manufacturers say they have little future potential because the cost of the fuel #+ device is high compared to the cost of the entire motorcycle. Eventually, demands began to be placed on fuel efficiency measures and internal exhaust gas for the conventional variable venturi cedar carburetor, and there was a limit to improving the accuracy of component dimensions, so the company decided to develop a system that combined with sub-control for motorcycles. Demand is increasing for m-use as well, and we are only beginning to look at fuel systems for motorcycles.

The purpose of the present invention is to improve the output power and I)
*Note: While maintaining relatively low cost, the disadvantages of high fuel consumption and variable waste removal characteristics have been revised.

The characteristics of conventional motorcycles using variable venturi type air ratios are the large diameter bore of the carburetor and the maximum venturi surface collapse obtained by the variable venturi. However, due to recent exhaust gas regulations and the depletion of energy keys such as "Kalin", the development of engines with an emphasis on energy conservation has been discouraged, and motorcycle manufacturers are also working hard to find a solution. ing. In light of these points, we have developed an electronically controlled feedback system using the 02 sensor and computerized carburetor, which has the most proven track record as an exhaust gas countermeasure, from among conventional technologies. We believe that the fuel control system according to the present invention is suitable in view of its countermeasures and improved startability.

Traditionally, fuel systems for heavy motorcycles have mostly been based on carburetors, with the exception of electronic fuel injection, which has begun to be used in some areas in recent years. It is widely used, and this ijJ variable venturi type air paper container has a manually operated Amar type variable venturi type air f id,
There is a variable venturi type carburetor manufactured by Chokusugi Oide that uses the venturi negative pressure generated by ventilation of a part of the venturi to control the venturi. -The manual type Amar type 1 machine of the 11th person does not have a valve type valve, but consists of a manually controlled venturi and a needle that is directly connected to the venturi to control fuel GTM. The needle controls all the fuel that is supplied to the engine over the entire operating range from idle to the adult output range. Father, since the venturi is mechanically opened and closed by the + force in this air pump, the ratio of suction A to fuel Ut is not constant, and as a result, the air-fuel ratio fluctuates greatly, making it increasingly difficult to operate. In the United States, it has become difficult to meet exhaust gas regulations. - In the back neck negative pressure operated type variable venturi type carburetor, a throttle valve is installed downstream of the venturi, and this is manually opened and closed to constantly maintain the LT force on the intake passage between the venturi and the throttle valve. It is designed to maintain a constant air-fuel ratio, and the fuel that matches the intake needle is ejected from the needle, resulting in a relatively constant air-fuel ratio. Similarly, the carburetor used for motorcycles includes a fixed Bear 5-Yuri type carburetor for general four-wheeled vehicles.
The minimum throttle area of the -6 variable venturi part of the fuel system is smaller than that of the former Amar type carburetor, which is used as a very small area to regulate the idle air interval. The minimum drawing surface structure of the field piece is a fixed venturi that does not change in the running range up to medium speeds, and when the suction device is increased from higher running speeds, the so-called venturi area is expanded. This is a variable venturi type machine called the semi-SU type. This type of carburetor differs from the Amar type carburetor in that it has a low-speed fuel system, so it has relatively better controllability with variations in idle characteristics and off-idle, and for this reason, the exhaust gas It is applied to motorcycles, which are subject to regulations.However, in order to comply with the exhaust gas regulations that will become stricter in the future and energy conservation, etc., these carburetors are considered to be indispensable. There is a need for detailed control of the air-fuel ratio that is suitable for all operating conditions.For example, changes in the air-fuel ratio due to changes in the intake air density due to changes in the intake air temperature, etc.
My colleague told me that the environment at the time of starting, such as changes in the air-fuel ratio due to changes in intake air density due to changes in atmospheric pressure, poor exhaust gas and fuel consumption needles, and other factors such as starting and warm-up characteristics at low temperatures. It has become necessary to enable suitable starting performance depending on the conditions, and to significantly improve starting performance, fuel efficiency during startup warm-up, driving performance immediately after startup, exhaust gas performance, etc.

One way to deal with this is to use a carburetor (fuel injection devices that are not for furnace use have been widely used (fuel injection devices that are not used for furnaces have been developed and announced for motorcycles, but the variation in characteristics is the same as that of carburetors). However, it is considered unsuitable for motorcycles because the cost of the system is much higher than that of a system using a carburetor.For this reason, the intake air It is a secret product that can be obtained at a relatively low cost and the automatic control of increase and decrease of fuel 1, which has been well thought out by Tetsu, is 4t.
tljff-I'm not only a 61-year-old who's not only good at improving, but I'm also a self-centered person who's difficult to control.
By using an electronic control circuit capable of providing detailed control at a low cost, which has been recently developed, it is possible to significantly improve the drawbacks of the conventional operation control using only a carburetor.

FIG. 1 shows, in a block diagram, a system of a control type fuel control device d for a motorcycle according to the present invention.

The intake air passes through the air cleaner 1 and the Roe modified venturi paper 1 ar 2, and at this time, it mixes with fuel in the carburetor and is sucked into the engine 3. On the other hand, the sensor 4 detects the intake air blackness in order to determine the operating conditions suitable for the JII environment condition, in which the open side 1 cannot be achieved with the carburetor alone, that is, the air-fuel ratio.
, an engine temperature sensor 6 that detects the status of the atmospheric pressure sensor 5 and the engine 3, for example, whether the cylinders of the engine 3 are warmed;
Signals from sensors in each building, such as the intake pressure sensor 7, the rotation detection sensor 8 of the engine 3, and the throttle valve opening sensor 9 of the Hikan 2, are human-powered, and all i! ! ! An output signal suitable for the operating conditions is provided to the computer (9) 10 purchased in the control circuit, the low-speed fuel system or the high-speed fuel system of the variable bet/tury type carburetor 2, the starter device, etc. air or 1
M, an electronically controlled fuel system for motorcycles consisting of an actuator 11 with one or more ports for controlling the fuel flow supplied to the engine 3 through 11 points of contact with the fuel flow, etc.
1 device, the city of Patent 6 Blue Request Range Paragraph 1 (with reference drawings).

Next, FIG. 2 is a sectional view showing an embodiment of a variable venturi type carburetor that uses the system shown in FIG.
In the low speed fuel system 14 composed of the slo jet 12 and the slow air bleed 13, an output signal from the computer IO is sent to the actuator 11 to control the air 1 introduced into the low speed fuel system 14. The operating time ratio of the opening/closing valve time due to the 0N-OF'F operation of 11, that is, the duty ratio control or the actuator 1
1, the γ air 1 is controlled using a proportional solenoid, etc., and the control T41 of the discharge speed combustion 1 is turned on.
An example of a ciJ modified venturi type air form which is adapted to supply 14 liters of air-fuel mixture (10) to the engine 3 is shown.

FIG. 3 is an embodiment according to claim 3, in which the low-speed fuel line passing through the slow jet 12 section of the low-speed fuel passage 14 of FIG. 2 is controlled by the actuator 11 as in FIG. 2.

FIG. 4 shows an iiJ modified venturi air-form paper container 2 showing an embodiment of claim 4, in which an actuator 11 is provided in the main air bleed 16 that introduces air into the high-speed fuel system 15, and the computer 10 outputs 1
Implementation ff1J in which the actuator 110 is operated by No. M to control the amount of fuel jetted from the main nozzle 17 of the high-speed fuel system.

FIG. 5 shows the main intake vent w518 of the variable venturi carburetor 2 and the low-speed fuel passage thread 1 in an embodiment according to claim 5.
4. A starting fuel system 19 is shown, which is configured for the purpose of heating fuel and air independently of the high-speed fuel system 15 and using it once at the start of the engine 3 and during warm-up operation. An actuator 11 (11) is disposed in a part of the yarn path 19, and the actuator 11 is actuated by the output signal from the core computer 10 to control the air-fuel mixture during startup and warm-up operation. A cross-sectional view of an example is shown.

FIG. 6 shows an embodiment according to claim 6, in which a signal from a throttle valve opening sensor 9 that detects the opening degree of the throttle valve 20 of the variable venturi carburetor 2 during deceleration and an intake of the engine during deceleration are shown. The computer 1 receives a signal from the sensor 7 that detects negative pressure.
A negative pressure passage 22 is provided in the float chamber 21 of the carburetor 2 in which the output signal from 0 is applied to the intake pipe negative pressure downstream of the throttle valve 20 of the air pump 2. The information is transmitted to the installed actuator 11 to reduce the pressure inside the foot 21 during deceleration, so that fuel injection from the low-speed fuel system and the stationary speed fuel system is stopped or reduced to a minimum. Give an example.

FIG. 7 shows an embodiment according to claim 7, in which a passage 23 for introducing atmospheric air is provided in the negative pressure ll1ll chamber of the diaphragm chamber of the variable venturi carburetor 2, and an actuator 11 is disposed in the middle of this passage 23. An example will be shown in which the venturi 24 is operated to change the venturi area (12) and control the air-fuel mixture.

According to the magneto-controlled fuel control device for motorcycles of the present invention, the carburetor is able to adapt to all environmental conditions without impairing the gear force characteristics and acceleration characteristics of conventional carburetors. At the same time, it is possible to perform suitable operation that cannot be controlled by bamboo, and at the same time
There is a young fruit that can be constructed at a lower cost than a fuel injection type fuel control side 1 device that does not use a blower.

[Brief explanation of the drawing]

FIG. 1 shows a block diagram illustrating the system of the present invention. FIGS. 2 to 7 each show a cross-sectional view of an iJ modified venturi type carburetor showing an embodiment of the present invention. 1...Air cleaner, 2...Machihen venturi set carburetor, 3...engine, 4...intake temperature sensor, 5...
・・Atmospheric pressure sensor, 6・・Engine performance detection sensor,
7... Intake pressure sensor, 8... Engine rotation detection sensor, 9... Throttle valve opening detection sensor for air blower, 10.
... Computer, 11 ... Actuator used in each embodiment of the present invention (13) Yueta, 12 ... Slow jet, 13 ... Slow air bleed, 14 ... Low speed fuel system line, 15・・・
・High-speed fuel system path, 16...Main air bleed, 1
7... Main nozzle, 18... Main intake passage, 19...
... Starting fuel system line, 20... Throttle valve, 21... Float chamber, 22... Negative pressure passage, 23... Atmosphere introduction passage, 24... Venturi that changes town, 25...・Diaphragm chamber negative pressure (14) 1st place 4th place 3rd country 4th place 0th place 7 Figure 10

Claims (1)

[Claims] 1. A control circuit using a plurality of detectors that detect conditions related to the driving performance of a motorcycle engine and a computer that inputs and calculates detection signals from the plurality of detectors. For motorcycles, one or more actuators that are activated by the output signal of this control circuit are installed in the fuel system of a variable venturi type engine to control the fuel supply to the engine. Electronically controlled fuel control device. 26. In the scope of claim 1 above, the actuator is operated to increase or decrease the empty supply needle to the low speed fuel system of the variable venturi carburetor according to a computer signal to connect the low speed fuel line to the engine/engine. An electronically controlled fuel control device for a motorcycle comprising a variable venturi type carburetor configured to control the fuel supply needle. 3. In the scope of claim 1g4 above, an actuator and a variable venturi type carburetor are provided. A motorcycle configured with an aJ modified venturi type carburetor that controls the fuel supply from the low-speed fuel system to the engine by increasing or decreasing the fuel supply needle to the low-speed fuel system based on computer signals. 4. In the scope of claim 1 above, the actuator increases or decreases the amount of air supplied to the high-speed fuel system of the variable venturi carburetor according to a computer signal, thereby increasing or decreasing the supply of air from the high-speed fuel system to the engine. An electronically controlled fuel control device for a motorcycle comprising an l1lIT variable ventilator type carburetor that controls the fuel supply needle.5. The engine is placed in a starting device consisting of a fuel passage and an air passage that are set separately from the low-speed fuel line and surface-speed fuel line of the carburetor, and the engine is warmed up at the time of starting and after starting by number 1d from the computer. The fuel f' supplied to
An electronically controlled fuel control device for a motorcycle which controls a fuel feed needle. 6. +4fJ qIn the scope of claim 1, the actuator is connected to the float plan of the variable venturi shape device and the intake passage downstream of the throttle valve.
, the air intake and
0T that allows H negative pressure to be guided to the float.
) & electronically controlled fuel control device for motorcycles, which is made of Venturi-shaped paper RB device. 7. In the scope of claim 1 above, the actuator is disposed on a path such that atmospheric air is supplied to a negative pressure chamber of a diaphragm chamber of a variable venturi type device, and the inside of the negative pressure chamber is controlled by the computer's number 1. The Seiko i! for motorcycles consists of a 4T modified ventilate type carburetor that releases pressure and controls the flow of fuel from the high-speed fuel system to the engine. l
] #1 type fuel control device.