JPS62267571A - Auxiliary fuel feeder - Google Patents

Abstract

PURPOSE:To ensure the traveling of a vehicle by providing an auxiliary fuel sucker and a device for forcibly closing a choke valve thereby exhibiting the function sufficiently even upon malfunction of an electronical control circuit. CONSTITUTION:A main fuel injection valve 11 to be functioned by an output from an electronic control circuit 10 and a carburetor 12 for supplying auxiliary fuel are fixed at the upstream position of a throttle valve 3 of an intake tube 2 for feeding a mixture gas to an engine 1 and the down stream position of a choke valve 5. Upon malfunction of the electronic control circuit 10, a manual operation lever 24 of a device 21 for forcibly closing the choke valve is pulled. Consequently, the fuel 14 fed through a fuel gate valve 20 interlocked with the manual operation lever 24 into a float chamber 13 of the carburetor 12 for feeding the auxiliary fuel is sucked by the differential pressure between the atmospheric pressure at the upstream position of the closed choke valve 5 and the negative pressure of the intake tube. Consequently, the safety of vehicle and the emergency countermeasure can be achieved by it's own ability through the operation employing only the auxiliary fuel.

Description

Detailed Description of the Invention (Field of Industrial Application) The water valve 11fl is an auxiliary fuel supply device that supplies fuel to the engine by controlling the thunderbolt. It is related to.

(Prior Art) Conventionally, electronically controlled fuel injection systems may not perform normal control due to a failure in the control circuit or mechanical failure, including a hit in the valve part, in which case the engine If the fuel supply to the engine is not properly adjusted according to the opening of the throat valve, the car may become unable to run, and the fuel efficiency may worsen. There was a drawback.

As a countermeasure for this problem, for example, as seen in Japanese Patent Application Laid-open No. 187533/1982, when an electronically controlled fuel injection system malfunctions, the main fuel injection valve (b) is installed separately, other than when starting the engine, to inject the starting fuel. ) 1 valve is operating, but in this case (also in this case), the starting fuel injection valve itself is an electronically controlled fuel injection device, so depending on the fault with the electronic control circuit, it may become inoperable and cause an abnormality. Not only is it ineffective as a countermeasure against fuel leakage, but it also has the disadvantage of running against the cost reduction of automobiles because the 2iI shield is quite expensive and does not control the fuel injection valve used during starting.

(Problems to be Solved by the Invention) Invention 1: Provides an auxiliary fuel supply device that is low in production cost and that can ensure the running of the vehicle without fully functioning even if the electronic control circuit breaks down. It is about providing.

<Means for Solving the Problems> The present invention provides a main fuel injection device that supplies main fuel to the engine in accordance with the opening degree of a throttle valve, and a suspension of air taken into the engine through an intake pipe. and an auxiliary fuel suction device that supplies auxiliary fuel to the engine in a state where the fuel in the auxiliary fuel chamber is sucked out into the intake pipe by the intake pipe negative pressure when the intake pipe becomes negative pressure. a fuel pump that supplies fuel to the auxiliary fuel chamber of the auxiliary fuel sucker and the main fuel injection device; and a choke valve that forcibly closes the choke valve at one time to supply auxiliary fuel to the engine. This is an auxiliary fuel supply device equipped with a strong locking device.

(Function) Under normal engine operating conditions, if the electronic control circuit fails and fuel is no longer injected from the main fuel injection valve J valve, for example, by pulling the operating lever of the choke valve forced closing device, auxiliary fuel is sucked into the engine. By supplying auxiliary fuel through a device and driving the vehicle using only auxiliary fuel, it becomes possible to carry out automatic measures for safety and emergency measures during automatic operation.

(Embodiment) Next, the configuration of an embodiment of the present invention will be described with reference to FIG.

In the intake pipe 2 that supplies the air-fuel mixture to the engine 1, at a position upstream of the suit 1 fer valve 3 and downstream of the choke valve 5, there are an intake pressure sensor 6, an intake air temperature sensor 7, a water temperature sensor 8, and a thrower 1. The main fuel injection valve 11 and the auxiliary fuel suction device 1 are operated by the output from the electronic control circuit 10 to which the output signal from the fuel position sensor 9 is input.
2. In this case, when the carburetor 12, that is, the intake pipe 2 becomes negative pressure, the flow 1 of the auxiliary fuel chamber to the fuel 14 in the chamber 13
An auxiliary fuel supply carburetor 12 is installed to suck out the main fuel into the intake pipe 2 using the internal pressure of the float chamber 13, in this case, the atmospheric pressure upstream of the choke valve 5 IN and the differential pressure between the intake pipe negative pressure. The fuel 14 in the fuel tank 15 is placed in the injection valve 11 at a high pressure step by step using an in-tank bomb 16 and a mechanical fuel pump 17, and is set in advance using a pressure regulator 18 and a return vibrator 1. It is then supplied to the auxiliary fuel supply carburetor 12 (3L fuel 14 in the fuel tank 15 is also connected to the in-tank feed pump 16 and back) to the choke valve forced closing device N21. The combustion valve 20 is operated by the output signal S from the switch that moves with υJ.
Also, the choke valve 5 is forcibly closed when the choke valve 5 is turned on, so that the engine 1
The choke valve 1 [opening device 21 is removed] to supply auxiliary fuel to the engine.

Next, the operation of this embodiment will be explained.

In the electronically controlled fuel injection head equipped with the auxiliary fuel supply device 25 configured as described above, if the electronic control circuit 10 fails and fuel is no longer injected from the main fuel injection valve 11, for example, the injection valve is forced to close. The carburetor 1 is connected to the engine 1 by pulling the manual operating lever 24 of the device, for example.
By supplying auxiliary fuel through the 2nd line and operating the Shirahobedun using only auxiliary fuel, it is possible to improve vehicle safety and emergency measures.
It is possible to take appropriate measures with your own knife.

Next, FIG. 2 shows another embodiment of the present invention, in which the lever 200, which rotates coaxially with the choke valve 5 by pulling the manual operation lever 24, is moved to the bimetallic lever 200.
Lever 20 fixed to choke valve 5 via 01
2 to close the choke valve 5 to a predetermined angle, and at the same time, the manual operating lever 24 lifts the diaphragm 104 upward via the link 203.20/I and unlocks the lcl tip 205. In addition, when the auxiliary fuel suction device 81 is connected to the diaphragm valve device 101, that is, when the intake pipe 2 is not under negative pressure, the diaphragm 104 is urged upward by the balance between the springs 102 and 103 and the fuel pressure, and the valve 105 is closed. In this state, fuel 14 is not supplied into the first pressure drop 106 of the auxiliary combustion chamber partitioned by the diaphragm 104, but when the intake pipe 2 becomes negative pressure, the diaphragm 104 is lowered and the valve 104 is closed. First pressure chamber 1
The diaphragm valve device 101 is configured such that the fuel 14 is sent into the first pressure chamber 106 at a pressure higher than atmospheric pressure, and the fuel 14 in the first pressure chamber 106 is sucked out into the intake pipe 2.

The bimetal 201 is designed to sense the temperature of the engine coolant, and when the temperature is -1 minute lower, the choke valve 5 closes to the 5' position, and this increases the negative pressure in the intake pipe 2, causing the auxiliary Increases the flow of combustion from the fuel chamber, making engine operation smoother. The other configurations, functions, and effects T are the same as in the example shown in FIG.

Next, FIG. 3 shows another embodiment of the present invention, in which the choke valve 5 is fully opened by pulling the manual operation lever 24, and at the same time, the rod 205 of the auxiliary fuel suction device is locked as in FIG. (not shown). In addition, the passage 300 and the bimetal chamber 301 bypass the choke valve 5.
, a passage 302 is formed, and the passage 300 is connected to a valve 304 that opens due to the deflection of a bimetal 306 heated by engine cooling water 303.
Area is regulated. The area is set so that the fuel supplied from the auxiliary fuel suction device and the appropriate air-fuel ratio will be achieved when the engine is sufficiently warmed up. In addition, when starting the engine at extremely low temperatures, the passage 300 is fully opened, and the air-fuel ratio is determined by the passage 3305. The frontage area greatly dilutes the air-fuel ratio, and the degree of dilution is determined by the spring characteristics of the bimetal 306.Other configurations, functions, and effects are the same as in FIG. 2.

4 to 6 also show other embodiments of the present invention), the lever 401 fixed to the thrower 1 to the valve 3 is connected to the link 4.
It is connected to a lever 403 which rotates coaxially with the choke valve 5 via a lever 403. The choke valve 5 is the lever 40
3, a spring 404, and a lever 405, and a lever 408 with a claw 407 is fixed to the other end of the choke valve foot 106. If the electromagnetic valve 409 is not energized in this state, the rod 410 is pushed out by the spring and caught on the pawl 407, keeping the choke valve 5 fully open, but the lever 403 can rotate freely. In addition, when the electronic control circuit is operating normally (the solenoid valve 409 is energized, but the battery voltage drops at extremely low temperatures), or when the electronic control circuit malfunctions, the electronic control The circuit cuts off the electrical pulse signal to the upper fuel injection valve 1 and the energization to the electromagnetic valve 409.Other than that, the configuration, operation, and effect are the same as in the example shown in FIG.

Next, FIG. 7 shows another embodiment of the present invention, in which the choke valve 5 can be operated by an actuator 22 in addition to a manual operation lever 24. This is equivalent to each example.

<-= Oh, auxiliary fuel (main fuel injection device and auxiliary fuel suction depending on whether the suction black is used only when the electronic control circuit fails, or is used during cold star 1 during normal operation or when accelerating). An electromagnetic on/off valve for fuel on/off for the fuel tank can be provided as appropriate.

(Effects of the invention!!) The present invention provides a main fuel injection system that supplies top fuel to the engine in accordance with the opening degree of the throttle valve, and a main fuel injection system that supplies top fuel to the engine in accordance with the opening degree of the throttle valve. a choke valve that limits ω of the intake pipe; and an auxiliary device for supplying auxiliary fuel to the engine in a state where the fuel in the auxiliary fuel chamber is sucked out into the intake pipe by the intake pipe negative pressure when the intake pipe becomes negative pressure. a fuel pump that supplies fuel r1 to a fuel suction device, an auxiliary fuel chamber of the auxiliary fuel suction device, and the upper fuel injection device;
The choke valve is forcibly closed at one time.
C. An auxiliary fuel supply device that supplies auxiliary fuel to the engine.

As a result, the present invention has the following advantages: low production costs, and 2) even if the electronic control circuit fails, it is possible to fully utilize its functions and ensure the running of the automobile.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of one embodiment of the present invention, FIGS. 2, 3, and 4 are explanatory diagrams of other embodiments, FIG. 5 is a plan view of FIG. 4, and FIG. The figure is a detailed view of the main part of FIG. 4, and FIG. 7 is an explanatory diagram of another embodiment of the present invention. 1...Engine 2...Intake pipe 3...
Throttle valve 4... Bimetal 5... Choke valve 10... Electronic control circuit 11... Main fuel injection valve 12... Carburetor 13... Float chamber
14...Fuel 15...Fuel tank 16.
17... Pump 18... Pressure regulator 19... Return vibe 20... Fuel on/off valve 21
...Choke valve forced closing device 101...Diaphragm valve device 102.103...Spring '104...Diaphragm 105...Valve 1
06...First pressure chamber #≠#

Claims (1)

[Claims] a main fuel injection device that supplies main fuel to the engine in accordance with the opening degree of the throttle valve; a choke valve that limits the amount of air taken into the engine through the intake pipe;
an auxiliary fuel suction device that supplies auxiliary fuel to the engine in a state where the fuel in the auxiliary fuel chamber is sucked out to the intake pipe by the intake pipe negative pressure when the intake pipe becomes negative pressure;
a fuel pump that supplies fuel to the auxiliary fuel chamber of the auxiliary fuel sucker and the main fuel injection device; and a choke valve that forcibly closes the choke valve when it is opened to supply auxiliary fuel to the engine. An auxiliary fuel supply device comprising: a closed device;