JPS6172838A - Fuel supply device of gasoline engine - Google Patents

Abstract

PURPOSE:To relax a shock when a speed change is operated, by providing a flow control device in the upstream or the downstream of a throttle valve interlocking to an accelerator pedal and electronically controlling said device in accordance with the running condition of a vehicle. CONSTITUTION:When a device is practically applied for the fuel supply device, providing a throttle valve 2 interlocking to an accelerator pedal while a Venturi part 12 and a choke valve 13 in the upstream side of said throttle valve 2 in an intake pipe 1, a flow control valve A is provided in the downstream side of the throttle valve 2. This flow control valve A is constituted by a valve unit 3, spring 4 acting on a bar 6, integrally formed with a rotary shaft 5 of the valve unit 3, and urging the valve unit 3 in its opening direction and an actuator 8 urging the valve unit 3 in its closing direction against the spring 4. And the actuator 8, when a change operation sensor detects speed change operation by an automatic speed changer, is operated through an electronic control circuit, in this way a speed change shock, when a speed change is operated, is prevented by closing the valve unit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application 1] The present invention relates to a fuel supply system incorporating a shift shock mitigation mechanism for a Ganlin engine attached with a fully automatic or semi-automatic transmission.

[Prior Art] When changing gears in a car equipped with a fully automatic or semi-automatic transmission, a shift shock occurs due to a discrepancy between the input shaft rotation speed and the output shaft rotation speed of the transmission, causing discomfort to the occupants. In order to avoid this problem, several countermeasures have been devised in the past. For example, when changing gears, the interlocking relationship between the accelerator pedal and the throttle valve is cut off, and the driver's A method has been devised to obtain a throttle opening that does not cause shift shock by using a stepping motor instead of pedal force, but in the unlikely event that this throttle control device malfunctions, there is no way to prevent shift shock. There was a risk that the throttle valve would not be able to be controlled and the engine would operate against the driver's will. In addition, a link mechanism that is linked to the movement of the accelerator pedal is attached, and when changing gears, a somewhat differential relationship is created between the degree of depression of the accelerator pedal and the degree of throttle opening, resulting in a modest engine rotation compared to the degree of depression of the pedal. A method to obtain this was also considered, but the attached mechanism had a complicated structure.

[Problem to be Solved by the Invention 1] As pointed out in the section of the prior art, the present invention significantly reduces the shock during gear shifting operations that tends to occur in automobiles equipped with conventional fully automatic or semi-automatic transmissions. It is an object of the present invention to provide a fuel supply system for a gasoline engine incorporating a simple auxiliary mechanism that can be operated reliably and reliably, and which can reduce the amount of stress.

[Means for Solving the Problems] Fig. 1 is a perspective view showing the components of the fuel supply system for a gasoline engine according to the present invention and their combinations, showing the vicinity of the throttle valve of the intake pipe of the gasoline engine with the upper half of the pipe cut away; This will be explained with reference to FIG. 1 as a side view and FIG. 2 as a side sectional view. 1 is an intake pipe of the engine, 2 is a throttle valve provided inside the intake pipe, and the downstream side of the throttle valve is shown in this figure. Flow control valve A is located at some distance on the right side.
will be established. As expected, the control well A is equipped with an attached means for keeping this valve open at all times. It is attached to bar 6. 7
is a locking member for setting the valve body to the open position. Further, an actuator 8 is assembled to the flow rate control valve as a reverse biasing means for closing the valve against the valve opening force of the valve spring 4. 9 is connected to a second bar 10 which is directly connected to the rotating shaft 5 of the valve body 3 during its operation. When the gear shift operation sensor of the automatic transmission, which is installed separately and is not shown in this figure, catches a gear shift operation signal, an operation command is issued to the actuator 8 via the attached electronic control circuit. It is configured.

[Operation] The operation of the fuel supply system for a gasoline engine according to the present invention will be explained below with reference to FIG. 1 briefly explained in the section of means. In this case, the throttle valve 2 opens and closes to an opening degree according to the amount of depression of the accelerator pedal, and stable running is performed at a desired vehicle speed. When a change occurs in the gear engagement of the transmission, such as by shifting down the gear shift lever when approaching a slope, then shifting up again when returning to a flat road, the amount of depression of the accelerator pedal is adjusted to appropriately follow the gear shift operation. Since it is difficult to intuitively control the speed change lever, there is a mismatch between the input shaft rotation speed and the output shaft rotation speed of the transmission, resulting in what is called a shift shock. At the same time as you operate the gear shift lever, the attached gear shift operation sensor detects the position movement of the gear shift lever, and this is input to the attached electronic control circuit, and the flow is sent to the flow control valve at a rotation degree corresponding to the preset shift lever movement state. An output signal is issued to the actuator 8 so that the valve closes. Therefore, for example, even if you shift down the gear lever of an automatic transmission, but unconsciously press the accelerator pedal in the opposite direction,
The flow rate control valve acts as a fool-safe mechanism, suppressing the airflow amount to a throttle state corresponding to or lower than a deceleration shift, thereby preventing the occurrence of the shift shock as described above.

[Effects of the Invention] The fuel supply device for a gasoline engine of the present invention having the above-mentioned configuration has the following effects.

B) As mentioned in the section on conventional technology, as a means of preventing gear shift shocks in gasoline engine vehicles equipped with fully automatic or semi-automatic transmissions, the conventional method of directly controlling the throttle valve using a stepping motor, etc. According to the device of the present invention, if the flow control valve actuating device malfunctions or malfunctions, the driver can operate the throttle valve using the accelerator pedal to control the running of the vehicle.

In the device of the present invention, the maximum outflow flowing through the intake pipe is determined by the throttle opening, so even if a device failure or malfunction occurs, the engine speed can be controlled according to the driver's will.

Furthermore, the structure is much simpler than the conventional shift shock prevention device, which has a complicated link mechanism attached to the accelerator pedal so that when shifting, the throttle opening is less than the amount corresponding to the degree of pedal depression. Since it is simple, it can be manufactured at low cost and reliable operation can be ensured.

[Embodiment] The embodiment shown in FIGS. 1 and 2 will be described in more detail with reference to FIG. 3, which is a perspective view of another embodiment of the flow control valve A. Throttle valve 2
A pliers 1 handle 12 and a choke valve 13 are provided on the upstream side, and an idle port 11 is provided on the downstream side. As mentioned above, the flow control valve A acts in the valve closing direction for a short period of time only during gear shifting, and has the function of suppressing the amount of airflow in the intake pipe, regardless of the opening/closing operation of the throttle valve 2. The operating mechanism can be configured in various ways using known techniques. In the examples shown in FIGS. 1 and 2, a fluid servo 8 that uses fluid pressure, such as air pressure or oil pressure, is used as the power source for rotating the valve body 3.
A Stella Pink motor 14 or the like as shown in FIG. 3 may also be used. Further, the flow control valve A may be provided upstream of the throttle valve.

Next, in Fig. 4, which is a side sectional view of the vicinity of the carburetor of an example in which the device of the present invention is incorporated into an intake pipe to which a two-barrel, two-stage, diaphragm type Stunberg type carburetor is attached, the intake pipe 1 is the primary side intake passage. B and secondary intake path C
The flow rate control valve A is installed in the primary intake passage B upstream of the primary throttle valve 15 installed in the primary intake passage B. 16 is a secondary throttle valve installed in the secondary intake pipe C. 17 is a diaphragm for operating the throttle valve, 18 and 19 are first and second slow boats, 20 is an idle port, 21
and 22 are pen 1 to air jets, 23 and 24 are -0- small venturis, respectively, and 25 is a choke valve.

Next, FIG. 5 is an explanatory diagram of the entire configuration of the device including the electric control circuit in an example in which the fuel supply device of the present invention is attached to an electronically controlled fuel injection device, and the flow control valve A is connected to the intake pipe 1.
It is installed on the upstream side of the throttle valve 2 inside. When the shift operation sensor 26 of the automatic transmission converts the shift operation into an electrical signal and inputs it to the computer 27 of the electronically controlled fuel injection system, command information preset corresponding to the gear ratio after shifting is selected and the actuator is activated. At 8, an instruction is issued to the control valve to operate it by a specified angle in the valve closing direction. In the figure, 28 is an air cleaner, 29 is an air valve,
30 and 31 are injectors and cold start injectors, 32 is a fuel tank, 33 is a fuel filter, 34 is a fuel pump, 35 is a delivery pipe, 36 is a pressure regulator, 37 is an ignition coil, 38 is an engine cylinder, 39
is a water jacket water temperature sensor, 40 is an engine exhaust oxygen m degree sensor, -10-41 is a throttle valve 2 opening sensor, 42 is an air flow meter, 43 is an emission control computer, and 44 is an ignition switch. be.

Next, there is basically no difference from implementation B, which incorporated the fuel supply system of the present invention into the electronically controlled fuel injection system shown in Fig. 5, except that the control valve was not fully open. The embodiment shown in Fig. 6 is equipped with a means for replenishing air to the intake pipe 1 in order to ensure the required engine rotational speed even when the flow rate control valve is When the valve is closed, the computer 2I issues a command to the 3-port solenoid valve 45 installed downstream of the air valve 29 to inject a predetermined amount of air into the intake pipe 1 from the air supply path 46 installed upstream of the throttle valve 2. Let it flow.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the intake pipe section of the first embodiment of the device of the present invention with the upper half of the pipe cut away, Fig. 2 is a side sectional view thereof, and Fig. 3 is the operating mechanism of the flow control valve. FIG. 4 is a side sectional view of an example in which the present invention is applied to a two-barrel, two-stage, diaphragm type Stromberg type carburetor, and FIGS. 5 and 6 are electronic control diagrams in which the present invention is assembled. FIG. 2 is a configuration diagram of a fuel supply device, each illustrating two embodiments of the fuel supply device. In the diagram 1... Intake pipe 2... Throttle valve 3.
・・Valve body of flow control valve 4・Compression spring 5・
... Valve body rotation shaft 6 ... Bar directly connected to shaft 5 8 ...
Actuator 14...Stepping motor 15
．． 16...First and second throttle valves 25...
Choke valve 26...Shift operation sensor of automatic transmission 27...Nbuta 2 of electronically controlled fuel supply system
9...Air valve 45...3 port solenoid valve

Claims (1)

[Scope of Claims] 1) In a gasoline engine connected to a fully automatic or semi-automatic transmission, a throttle valve interlocked with an accelerator pedal, a flow rate control device provided upstream or downstream of the throttle valve, and a vehicle running state. A fuel supply system for a gasoline engine, which is combined with an electronic control device that inputs the flow rate control device and operates the flow rate control device. 2) The fuel supply system for a gasoline engine according to claim 1, wherein the flow rate control device comprises a flow rate control valve and an actuator thereof. 3) The fuel supply system for a gasoline engine according to claim 1, wherein the flow rate control device comprises a flow rate control valve, its actuating device, and an air valve. 4) The fuel supply system for a gasoline engine according to claim 2 or 3, wherein the actuating device is a stepping motor. 5) The fuel supply system for a gasoline engine according to claim 2 or 3, wherein the actuating device is a servo motor. 6) The fuel supply for a gasoline engine according to claim 2 or 3, wherein the actuating device is a spring serving as a biasing means for keeping the stepping motor and the flow control valve in a closed state. Device. 7) The fuel for a gasoline engine according to claim 2 or 3, wherein the actuating device is a spring serving as a biasing means for keeping the fluid servo and the flow control valve in a closed state. Feeding device.