JPS59226258A - Method of and apparatus for controlling quantity of intake air in engine - Google Patents

Abstract

PURPOSE:To enable to supply a required quantity of air or air-fuel mixture correctly according to the operational conditions of an engine, by making the pressure of pressurized air act or an open/close valve by controlling the pressure of pressurized air according to the operational conditions of the engine, and supplying air or the like to an intake passage on the downstream side of a throttle valve at the rate corresponding to the opening of said open/close valve. CONSTITUTION:In ordinary operation of an engine, a control valve 17 is opened and pressurized air is always introduced into a control chamber 11. Thus, since a diaphragm 10 is deflected toward an atmospheric chamber 12, an open/close valve 5 is kept closed. At the time of starting, decelerating an engine and at the time of idling operation of the engine, an output signal corresponding to respective operational conditions of the engine is applied to a solenoid 20 to close the control valve 17 continuously for a certan while or to open and close the same by a prescribed duty ratio. By thus interrupting supply of pressurized air to the control chamber 11 via a pressurized- air passage 15 and releasing pressurized air from an exhaust port 16, pressure of pressurized air in the control chamber 11 is reduced. Thus, since the diaphragm 10 is moved to the position where it is balanced with the force of a spring 13, the open/ close valve 5 is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an engine air amount control method and control device for appropriately supplying the air or mixture required for starting, decelerating, and idling the engine downstream of the throttle valve in the intake passage. 14', 1.

As is well known, the intake air amount of an engine is controlled by a throttle valve installed in the intake passage, and when the throttle valve is placed at an extremely small opening across the closed position, the intake air amount required for the engine is controlled. It is also well known to maintain engine operation by replenishing air or air-fuel mixture in the form of air or air-fuel mixture to maintain engine operation and to take measures against exhaust scum. It is necessary to supply air or mixture to the intake path downstream of the throttle valve.

Mainly during startup, deceleration, and idling, 1f downstream of the throttle valve in the intake path! An auxiliary passage is connected to the auxiliary passage, and air or air-fuel mixture is supplied by opening an on-off valve provided in this auxiliary passage at a predetermined time. Also, the most common type of on-off valve is θ, which moves due to negative pressure in the suction pipe. With method c, since the suction pipe negative pressure varies depending on the operating state of the engine, it is necessary to provide a divine aid passage and an on-off valve for each purpose, making the entire device extremely complicated.1. Not only C,
There was a concern that an unintended opening/closing valve would open depending on the suction pipe negative pressure value. Furthermore, since the pressure in the suction pipe is not constant, it is not possible to control the on-off valve (on/off), and the flow rate of air or mixture cannot be controlled.

The invention solves these problems and uses a single auxiliary passage and a single closing valve to supply a predetermined amount of air or mixture to each of the starting, decelerating, and idling valves. A method and apparatus for replenishment is provided.

That is, in order to achieve this object, the method for controlling the engine air pump according to the present invention is to control the h11 pressure by controlling the air pressure in the reverse state of the engine to act on the on-off valve, and to control the air or mixture passing through the Kamisuke passage. It is characterized in that the flow rate of the pressurized air is controlled by jl+j according to the opening degree of the on-off valve corresponding to the controlled pressure of the pressurized air, and is supplied to the intake path downstream of the throttle valve 9iij. In addition, there are 11 devices in one group that are attached to the heather.

A Kamisuke passage for air or mixture replenishment connected to the throttle valve downstream 11] 11 of the intake passage, an on-off valve that controls the effective surface tR of this Kamisuke passage, and a pressure of pressurized air that drives this on-off valve. The engine is characterized in that it is equipped with a control valve that drives the lightning 8 to be controlled, and that the control valve is driven by an output signal generated by an electronic control unit depending on the operating state of the engine.

Next, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the present invention using a vaporizer,
Venturi] and a throttle valve 2 in the intake passage 3.
A Kamisuke passage 4 is provided to bypass the Kamisuke passage 4.
An opening/closing valve 50 and a valve seat 6 are installed at the center of the diaphragm JO), a needle-shaped valve body 7 is built in, and a valve rod 8 that is integrated with the 1-square body 7 is located at the center of the diaphragm JO)) b li! j'1 has arrived. The diaphragm 0 is a layer that separates the control chamber 11 and the atmospheric chamber 12, which form the internal parts 4 and 11 of the on-off valve 5, and is built in the atmospheric chamber 12 to fully open the on-off valve 5. direction f
1! iI+ <Spring> Receives 3. . Also, in the control room 1] there is an air pump 14 which is externally rotated at the same time as the engine.
A jet-shaped exhaust port 16 is connected to a pressurized air passage 5 through which pressurized air pressurized to a constant pressure is sent, and a jet-shaped exhaust port 16 is connected to the pressurized air passage 5 which sends pressurized air pressurized to a constant pressure. have.

A control valve 17 is installed in the pressurized air passage 15 , and a valve body 19 that is seated on a valve seat 18 and closes the pressurized air passage 15 is connected to a grunger of a solenoid 20 . ? The Shishi type 'IIl control unit 2] controls the opening of the throttle valve 2, the suction pipe negative pressure, the engine rotation speed and other engine starting,
A device that receives electrical signals from sensors that detect driving conditions such as speed, idling, etc., processes the data, and sends an output signal consisting of continuous current or pulsed current to solenoid 20 to operate control valve 7. It is.

In addition to the above, the control unit 21 also includes vehicle headlights,
Operation of equipment that generates lightning FA loads such as cooler TC, Xunwu,
The output signal may be corrected by detecting and inputting engine temperature, oxygen concentration in exhaust gas, etc.

In such a configuration, when the engine is in a normal operating state, the control valve 17 is open and pressurized air is supplied to the control chamber 1.
IVC is continuously introduced, the diaphragm 10 is deflected toward the atmospheric chamber 12, and the on-off valve 5 is closed. Starting and decelerating the engine.

During idling, an output signal corresponding to each operating state is sent to the solenoid 2o, and the control valve 7 is continuously closed for a period of time or opened and closed at a predetermined duty ratio to pass through the pressurized air path 15 to the control room 11. The fed pressurized air is shut off, and during this time, the pressurized air is released from the exhaust port 16, thereby reducing the pressure in the control chamber 11, and moving the diaphragm 10 to a position where it balances the force of the spring 3. This opens the on-off valve 5. R (1. The output signal that drives the control valve 17 is.

At startup, it is determined by the engine temperature, throttle valve opening, engine rotation speed, etc. At deceleration, the engine rotation speed is determined by 1. W,
Suction pipe negative pressure7. At idle, it is determined by the throttle valve opening, engine speed, etc. The air or air-fuel mixture passes through the auxiliary passage 4 whose effective Wit product is controlled by the on-off valve 5 and is discharged to the downstream side of the throttle valve 2 of the intake passage 3.

FIG. 2 shows a different example of non-invention.

Throttle valve 22 of intake passage 23 having a fuel injection valve (not shown)
An auxiliary passage 24 is connected to the downstream side of the valve seat 2, which is the same as above.
6. An on-off valve 25 having a valve body 27 is provided. The valve rod 28 is fixed to the diaphragm 30 that partitions the drive unit 290 of the on-off valve 25 from the control chamber 31 and the atmospheric chamber 32, and the spring 33 built in the atmospheric chamber 32 is applied to the diaphragm 30 in the direction of fully opening the on-off valve 25. It's working. In addition, a direction switching 10 control box 37 driven by a solenoid 40 is connected to the air pump 34 by 1ii1. ! All 3 to qilli room 31
1-pressure air passage: Provided at $5, and further installed in the control room 31.
The same exhaust port 36 as 'IN' is provided.

At this 4%) R, when the engine is in normal operating condition, the ilt control valve 37 is at atmospheric pressure 1+! Q and discharges the pressurized air sent from the air pump 34 to the atmosphere 9
．． The diaphragm 30 is bent toward the control chamber 3 by the force of the spring 33, thereby closing the 1→;j closing valve 25. When the engine starts, decelerates, and idles, an output signal corresponding to each operating state is sent from the control unit 2j to the solenoid 40, and the control valve 37 is continuously operated for 1 or 1 hour.
Pressurized air is connected to the control chamber 311D11 at a constant duty ratio and introduced into the chamber 3, and the diaphragm 30 is moved in a direction that balances the force of the spring 33 to open the open valve 25. be. The pressurized air in the control room 3 is supplied through the exhaust port 36.
The pressure in the chamber 31 is controlled by the control valve 37, and the opening degree of the on-off valve 25 is controlled.

Note that the air or air-fuel mixture supplied through the auxiliary passage 4.24VC is most important at the time of starting.

When idling, a relatively small amount is required, and when decelerating, ζ,
those that require an intermediate amount between these.

Pressurized air line 15.3 with output signal from control unit 21
Control valves 5 and 7.37 are controlled to control the pressure in the control chambers 11 and 3 to change the opening degrees of the on-off valves 5.25 and 7.37, thereby controlling the pressure to the respective predetermined amounts.

Furthermore, it is also possible to replenish air or air-fuel mixture during acceleration or high load based on the output signal from the control unit 21.

As described above, according to the invention, the on-off valve that controls the loading area of the auxiliary passage that replenishes air or aiki to the downstream side of the throttle 5-P is controlled by 9. This system generates pressurized air at a constant pressure and controls the flow of air or mixture by controlling the pressure from the engine's volatile state fp%K. In addition to controlling the moving pressure, a predetermined amount of air or air-fuel mixture is supplied at regular intervals according to operating conditions such as starting to 171 fc speed, idling, etc., and the engine is operated for internal use. In addition, by simply providing one set of auxiliary passages and on-off valves, the engine air can be controlled in one direction.

This is achieved by significantly increasing the overall complexity of the device.

[Brief explanation of the drawing]

Figures 1 and 21 are cross-sectional views of specific examples of the invention. 2.22... Throttle P, 3, 2... Intake F', 6, 4.24... Auxiliary passage, 5.
25...15:! l'41 valve, Q, 29・
...1) jx movement 3, 31, 3] ...1
1 Chuan Province II rating, 14.34...Air pump,
]5.35... Pressurized nitrogen air path, 17.37...
...f131J goben, 21...ffji]
control unit. I, □11. Yo (1, yo,”') 4, □, /

Claims (1)

[Claims] (The pressure of the pressurized air is controlled according to the operating state of the engine and acts on the opening 1y1 valve, and the pressure of the pressurized air is controlled according to the air passing through the auxiliary passage or the flow of mixed batter.) (2) Throttling of the intake passage An auxiliary passage for air or mixture replenishment connected to the downstream side of the valve 1jii, an opening/closing valve P that controls the effective area of this auxiliary passage, and an electromagnetic drive ψ that controls the pressure of pressurized air that drives this opening/closing valve. electronic control valve according to the engine operating condition T1.
ll I'pl unit outputs the output signal to control the
An engine air amount control device characterized in that 1P is configured to be moved continuously.