JPS5946351A - Apparatus for controlling flow rate of intake air of engine - Google Patents

Abstract

PURPOSE:To improve the starting performance of an engine, by providing a check valve for permitting fluid to flow only from the side of a pressure chamber to the side of an intake passage located on the downstream side of the pressure chamber in a negative-pressure passage communicated with the pressure chamber in a pressure responsive apparatus which determines the opening of a by-pass valve according to the level of pressure acted in the pressure chamber interlocked with the by-pass valve. CONSTITUTION:Through provision of a position sensor 38 for detecting the opening of a by- pass valve 20, the engine speed is controlled to be equal to a desired engine speed by controlling the opening of the by-pass valve 20 according to the deviation between an aimed opening determined on the basis of deviation of the engine speed and the actual opening detected by the position sensor 38 at the time of idling operation of an engine. With such an arrangement, it is enabled to control the engine speed extremely promptly and to slove the problems such as engine stall during idling operation. Further, since a check valve 33 permitting fluid to flow only from the side of a first solenoid valve 32 to the side of an intake passage 8 is provided in a negative-pressure passage 28, gas in a pressure chamber 26 is drawn toward the intake passage 8 via the first solenoid valve 32 when the absolute value of the negative pressure in the manifold is large even at the time of cranking an engine for starting the same when the negative pressure in the manifold is low, and this state is maintained by the check valve 33. Therefore, a relatively high negative pressure is acted in the pressure chamber 26 even at the time of starting, so that the starting performance of an engine can be improved.

Description

[Detailed description of the invention] The present invention relates to an engine intake air amount control device.

Conventionally, in automobile engines, 5, for example, JP-A-54
As shown in No. 76723, a bypass valve driven by a negative pressure motor, which is a pressure-responsive device, is provided in the throttle bypass passage, and a solenoid valve that controls the negative pressure supply of the engine to the pressure-responsive device is driven by a microcomputer. It has been proposed to control the amount of intake air by adjusting the opening degree of the bypass valve according to the operating state of the engine. ``During fitting operation, it is difficult to adjust the opening of the high-pass valve via the solenoid valve in order to perform Eid hack control of the rotation speed. A1. During other operating conditions, the solenoid valve is opened for a preset time to obtain an appropriate amount of intake air, and the Ipass valve is controlled to the appropriate opening. In some cases, the bypass valve is controlled to an opening degree that is set depending on the engine temperature. By the way, when starting the second engine, the number of revolutions is ~7 high enough (the negative pressure generated in the engine is extremely small, so the negative pressure is not supplied to the pressure response device based on the opening of the solenoid valve). Not enough.

There was a risk that the bypass valve could not be controlled to the planned opening, resulting in deterioration of the starting dynamics of the first aircraft.

The present invention has been proposed in view of the above.1. ] - Throttle valve installed in the intake passage of the engine, one end of which is connected to the intake passage on the downstream side of the throttle valve, and the other end is connected to the intake passage on the above-mentioned throttle valve θ;C side or to the atmosphere. a bypass valve that is interposed in the bus passage and controls the flow rate of the intake air passing through the bus passage, and the bypass valve pressure chamber, and the bypass valve pressure chamber. a pressure response device that sets the opening degree of the bypass valve according to the magnitude of the pressure acting on the bypass valve; one end communicates with the pressure chamber, the other end communicates with the intake passage downstream of the throttle valve; A negative pressure passage that conducts the negative pressure of the intake passage on the downstream side, and a solenoid valve means interposed in the negative pressure passage.

control means for detecting the operating state of the engine, driving the solenoid valve in accordance with the detection result, and controlling the negative pressure acting on the pressure chamber; and controlling the bypass valve in accordance with the operating state of the engine. The engine is driven to adjust the intake flow rate of the engine, characterized in that the negative pressure passage is provided with a check valve that allows passage of fluid only from the pressure chamber side to the downstream intake passage side. The gist of this paper is the intake air amount control/device.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The embodiment shown in Fig. 1 uses engine auxiliary equipment such as a cooler compressor for a near conditioner (hereinafter referred to as an air conditioner), an oil pump for power steering, charging a battery, and supplying power during continuous operation of electrical loads such as headlamps. The present invention relates to an automobile equipped with an alternator, and 2 is an engine body of a positive displacement reciprocating type C combustion engine.

An exhaust manifold 4 is attached to one side of the engine body 2, and an intake manifold 6 is attached to the other side. The intake vent 1jis 8, which has one end communicating with the engine combustion chamber via the intake manifold 6, has a throttle valve 10. Fuel injection device 12 and air flow meter (Karman vortex flow meter) 14
is interposed therein, and the other end of the passage 8 communicates with the outside air via an air cleaner 16. The fuel injection device 12 is a fuel injection device.
A solenoid valve 1, which is a fuel flow regulating valve, is installed in the fuel passage through which low-pressure fuel is supplied from the intake passage, and the amount of solvent injected into the intake passage corresponds to the opening time of the solenoid valve. It is now set (・ru. Also.

A bypass passage 18 is formed in the intake passage 8 so as to bypass the throttle valve 10.
8 is provided with a bypass valve 20 that controls the intake air supplied to the engine combustion chamber by controlling the intake air passing through the passage 18, and this bypass valve 20 comes into contact with the valve seat to prevent the bypass Fully closed position (first
The VC is movable from the rightmost position in the drawing to the fully open position (the leftmost position in Fig. 1) determined by a stopper not shown. Further, the bypass JT 20 is connected to a diaphragm 24 of a pressure response device 22 which is an actuator. The pressure chamber 26 of the pressure response device 22 communicates with the intake passage downstream of the throttle valve 10 via a Vt pressure passage 28.

The pressure chamber 2 is connected to the intake passage on the earth flow side through the atmospheric passage 30.
6 is supplied with intake negative pressure (1; I is typically referred to as manifold negative pressure) through the self-pressure passage 2B, and the large air passage 60
There is one node so that atmospheric pressure is supplied through. In addition, the negative pressure passage 28 is provided with a normally closed first lenoid valve 32 and a check valve 35 between the quantity valve and the boat on the intake passage 8 side, which allows fluid to move only from the lenoid valve side to the port side. , the first strain/id valve 32 controls the intake air supplied to the pressure chamber 26. On the other hand, a normally open second renoid valve 54 is interposed in the atmospheric passage 30.

This second inlenoid valve 4 controls the atmospheric pressure supplied to the pressure chamber 26. 35a and 55b are orifices for flow rate control. Further, a spring filter 6 is disposed within the pressure chamber 26, and this spring filter 6 biases the pressure valve 20 in the closing direction via the diaphragm 24.
The bypass valve is a normally closed valve. That is, the pressure chamber 2
When no negative pressure is applied to the bypass valve 6, the spring 36 holds the bypass valve in the fully open position, which is the mechanically determined minimum opening position. Reference numeral 58 denotes a position sensor that uses a variable resistance to detect the opening degree of the bypass valve 20 by detecting the position of the tire flam 24 of the pressure-responsive device 22. The signal is input to computer 40.

The computer 40 displays the opening position a1. In addition to the bow, the intake air signal is output from the F-flow sensor 42 installed in the F-flow meter 14, and the intake air temperature sensor 45 installed near the upper dC-I-7 flow meter 14 (-j) is also output. Filter intake air 1Ail signal, ignition/ignition/pulse signal output from engine ignition device 44 ('till engine rotation speed 114), detection of cooling water temperature of engine body 2 '1 filter cooling water temperature The cooling water temperature F output from the sensor 46, the eye 1 which detects that the throttle valve 10 is in the fully closed state, and the F I output from the reference isoji 4B.
le (rr ”T + aero/('1 motion switch 50
Engineering '7 con (5 bows,
A switch (hereinafter referred to as a power steering switch) 52 that detects the power steering hydraulic pressure 5 in a state of deafness (a state in which the steering wheel is rotated from a neutral position) also outputs a power steering signal 9 installed on the output shaft of the transmission (not shown). - a vehicle speed signal output from the vehicle speed sensor 54,
An opening signal output from an opening sensor 56 that detects the opening of the throttle valve 10 from fully closed to fully open and the battery 5
A voltage signal output from 7 is input.

By the way, each electrical load of a car (e.g. headlamp)
The battery 57, which supplies electricity to the engine 69, is charged by the alternator 0 driven by the engine via the voltage regulator 68, and the electric load starts operating.

When the regulator 68 detects the voltage drop across the alternator 57 that occurs based on the start of its operation, the regulator 6B supplies an all-tire 7[lVc field current, and power generation starts at the alternator 0. The voltage of the battery 57 returns to the steady value range. After this,
While the electrical load is operating, the alternator 70 acts as the regulator 6B.
Power generation continues under voltage control. On the other hand, when the operation of the electric power generator stops, the voltage of the battery rapidly increases because the alternator 70 continues to generate electricity at the moment of stopping, but if the battery voltage exceeds the steady value range due to the sudden increase in voltage, a leak occurs. stops the supply of field current, and the generation of electricity by the All-Kunator 700 is stopped.

In addition, the above air conditioner switch is a manual switch for details.
a, a temperature switch 50b, and an I+ switch 50c. Of these, the Il1 degree Suinoji 50b detects the temperature inside the vehicle and is a normally closed switch/chie that turns off when the temperature falls below the set temperature, and the 1st Kasuinochi 5Dc has an abnormal power of 10 months. +i'il <
When it becomes off-duty, it is Nuinochian. and top d
C three switches 50a.

50b and 50c are connected in this order, and the upstream 11111 terminal of the manual switch 50a is connected to the positive terminal of the battery 57, while the downstream terminal of the pressure switch 50c is connected to the well-known delay circuit 55. It is connected to the power transistor 55 via. This power transistor 5
Reference numeral 5 operates a power relay 59 that drives an electromagnetic clutch, which is a disconnection device (not shown) of the compressor 51. Further, the downstream terminal of the pressure switch 50c is connected to the computer 40.
When all of the six switches 50a, 50b, and 50c are in the on state, an air conditioner on signal is input to the six switches 50a, 50b.

An air conditioner off signal is input when even one of the air conditioners 50c is in the off state. The vehicle speed sensor 54 extracts the vehicle speed as a pulse signal from the rotation angle of the output shaft.

The computer 40 includes an input waveform shaping circuit 5B that performs waveform shaping of each input (g (including A/D conversion of the sedge signal) of the cooling water temperature signal, voltage signal, opening position signal, etc.);
CPU60. RAM 62; has a RONj 64 and an output waveform shaping circuit 66; in this computer 40, an output pulse 11.1 is used to control engine output from each of the above-mentioned input signals and arithmetic information stored in advance in the ROM 64;
Is the number I+? By the way, in this embodiment, the pulse signal output from the computer 40 is the injection 1fl signal 7 which determines the injection rli of the fuel injection device 12, the advance amount signal which determines the advance amount of the ignition device 44, and the first solenoid valve 5
2 serves as a first valve drive signal and a second valve drive signal that opens and closes the second solenoid valve 4. and the first
Both solenoid valves 52 and 54, which are opened and closed by the valve drive signal and the second drive A1, B, and B3, respectively, cooperate to adjust the force in the II force chamber 26 of the pressure-responsive device 22 and to control the bypass valve 20. The opening degree is controlled to control the amount of intake air.

That is, this embodiment uses the computer 40 to control the overall injection of the fuel injection device 12 (adjusting the advance angle of the ignition device 4.1 and/or the opening degree of the Ipass valve 20). This control is performed by executing each m flow stored in the ROM 64 in advance according to instructions from the CPU 60.The concrete flow is shown in FIG. As shown, condition determination flow A for identifying the operating state of the engine, valve opening control flow B for controlling the opening degree of the no-bus valve 20 by controlling the two solenoid valves 52°s4 to ff1M, and the target rotation speed during idling. 1! Detection Flow F is the main flow, and each flow is selected by an interrupt signal issued by the CPU 60. Among these flows, the condition determination flow A is determined by the ignition device 440.
The one-rotation speed setting flow C is executed in synchronization with the ignition and firing, and is executed in response to the interrupt signal of the first timer with a relatively short cycle t1 compared to the valve opening control flow B). (Period t2 (approximately 4 to 5 times the period of the first timer) σ) Executed in synchronization with the interrupt signal of the second timer, the fuel supply flow D and advance angle flow E are extremely short.
The voltage detection flow F is executed in synchronization with the fourth timer at the end of the cycle, and the voltage detection flow F is performed at the cycle (t, /2) after the first timer.
) is executed in synchronization with the fifth timer that controls the timer.

In the following, we will explain the opening adjustment of the 2-line valve 20, which is performed based on the 2-line valve 1 judgment flow A, the JT opening control flow B1 the rotation speed setting flow C1, the electric moon detection flow F. The control performed by adjusting the opening of the engine is broadly divided into engine speed control where the engine speed is input (specifically, idle speed control) and opening control where the engine speed is not input. To make the distinction, please perform the correction regarding the micromill 4) s fluctuation, which will be described later, in the judgment flow of Jokichijo A'1.

In condition determination flow A, first, at A-0, it is determined whether the engine is at the time of starting or old. Specifically, this is determined to be the first IJLI time when the engine is turned on and the monthly/non-rotational speed Nr is less than or equal to the set rotational speed (for example, 200rllllll). Then, at A-1, the engine rotation speed Nr is abnormally low rotation speed (s6orp
m).

At A-2, it is determined whether the idle switch 48 is on (that is, the throttle valve 10 is fully open) or not, and at A-6, whether the vehicle speed output by the vehicle speed sensor 54 is less than or equal to a set value (for example, IKm/h). At A-4, the change state of (vehicle speed Vr)/(engine speed Nr) is detected, and at A-5, the (actual) engine speed Nr is determined.
It is determined whether the absolute value of the deviation ΔN of the target rotation speed NS is less than the set value ε (that is, whether Nr is in the ISC rotation range or not), and the engine rotation speed after starting is determined. is not at an abnormally low rotation speed, the idle switch 48 is on, the vehicle speed is less than IKm/h, and the absolute value of the deviation ΔN is less than the set value ε (hereinafter referred to as Ca5el). and the engine speed after starting is not abnormally low and the idle switch 4
B is on, the vehicle speed is at least IKm/h, and the amount of change in Vr/Nr is ΔV/N (Vr sampled this time).
/ Vr sampled 00 times from the value of Nr / subtracting the value of Nr) is determined to exceed a certain positive linear α for n times (for example, 2 times) or more in a row, and the absolute value of the deviation ΔN When the value is less than ε (hereinafter referred to as Ca'se2), it is determined that the engine is in a stable idling state and the engine speed is controlled (hereinafter referred to as ISC).
and the above Ca5e1. When the condition is other than Ca5e2, an instruction is given to control the opening degree. The instructions for this condition determination flow A are B- in the opening control flow B, which will be described later.
At step 20, the ISC is designated and is used to determine whether it is a sake cup.

By the way, Ca5e1 is a normal idling state when the vehicle is stopped, and Cage2 is a state where the clutch is disengaged while the vehicle is running, or the transmino/con is held in neutral and the ennon is idling (i.e. The state of inertia is completely absent. In Ca5e2, when determining whether to start coasting, it is used to detect a sudden decrease in the engine speed caused by disengaging the clutch during running (normal operation/during deceleration by gin flake). In other words, when moving from an engine braking state to a coasting state by disengaging the clutch, there is a slight change in vehicle speed before and after the clutch is disengaged, whereas the engine speed changes from being forced to rotate to a fitting state. decreases rapidly. For this reason, the amount of change ΔV/N for each sample in (vehicle speed Vr)/(engine speed Nr) is larger than a certain positive value α. I will express it.

Specifically, in this embodiment, it is determined that coasting has started when it is detected that ΔV/N becomes larger than α zero or more times in a row. + In Ca5e2, after the start of coasting was detected at A-4.

At A-5, the ISC is instructed after confirming that the engine speed is within the ISC speed range.

On the other hand, the end of coasting is determined by detecting at A-5 an increase in the engine speed due to engagement of the clutch (engine speed is out of the ISC rotation range). By the way, the Vr/Nr used to determine the start of coasting is as follows.

Both vr and Nr are the vehicle speed sensor 54 and the ignition device 4.
4 is also taken in as a pulse signal, so it can be determined by checking how many ignition pulses are output while the vehicle speed sensor 54 outputs a predetermined number of pulses.

Next, the explanation will move on to the opening degree control flow B.

First, in executing opening control flow B,
・Don't initialize the Nyonosenza 3B.

This is the RA before starting the engine.
It is held in each Arles of M62 (Clear 1^ (
What should be done after l0 (to zero) is to first convert the output (voltage) of the bore/sensor 58 corresponding to the opening position of the Ipass valve T20 (i.e., the fully open position) at the starting Rf+ to the A/D 9. A]Res A in RAM 62 as initial position information. 'IK people.

Then A. 0 of 1 direct. , the movement range information 〆bind, which is stored in the ROM 64 in advance and gives the allowable movement range of the bypass valve 20, and the same (minimum opening setting information stored in the ROM 64), setting information for setting the target opening, which will be described later. The minimum and maximum values of g68 are calculated and input to addresses 80+ and AO2 of the RAM 62, respectively.

Ao+ = lo+It, + AO2=flo +l'
b + da band, but in this case, the band is extremely small, and the band + 1 Zf band is the mechanically determined fully closed position (position in contact with the valve seat) and fully open position (not shown) of the bypass valve 20. position determined by the stopper)
This corresponds to a value slightly smaller than the distance t between .

The relationship between the actual position (opening degree) of the bypass valve 20 and the opening degree information input into the RAM 62 is as shown in FIG. Therefore, the position (opening degree) of the bypass valve 20 is m
The target opening degree is controlled between the position (opening degree) corresponding to m1n and the position (opening degree) corresponding to amax as described later. By the way, at this time, the 1-target opening degree described later is also upper tL+2fmin and 96m.
It is designed to be placed between the ax and the ax.

After the initial settings have been made in this way, 1JIJ
The Iu control flow B is executed in synchronization with the interrupt m of the first timer and moves the bypass valve driving means 1'1.

In this flow B, first, specific load fluctuations that occur during work/non-operation (for example, turning on and off of an air conditioner).

Detect activation/non-operation of the power steering device, changes in battery voltage that occur due to fluctuations in electrical load, and if load fluctuations are detected, correct them (
If no detection is detected, the rotary rotation speed control or the opening degree control is selectively executed based on the rll determination in the condition determination flow A.

This opening control flow B will be explained in detail below using FIGS. 4(a')' and 4(b). When the interrupt signal of the first timer is generated, first, in B-1, it is determined whether the air conditioner switch has been switched but it is a cup, and if the switch has not been switched, it is instructed to jump to B-6. On the other hand, when switching is performed, the address N of RAM 62 is stored in B-2.
Enter 1 in .

Further, in B-5, it is determined whether the direction of the above switching is off-on or on-off, and in B-4 (or B-5), the target opening change amount is determined from ROM and lS4 according to each case. ΔRime, 6g62! .

Read Δg, 1 (or Δ〆j2+Δri22.Δda32) and set the address AI+A2+ of RAM62 respectively.
Enter in A3. At this time, Δ31 is expected to be optimal if transient phenomena are ignored in compensating for the J-engine load fluctuation caused by switching the air conditioner switch from off to on.
It is the amount of change in E, and is also 6g611+Δri20. is Δ1
Similar to 3+, it is the amount of change in the stop state, and its magnitude is ΔD■〉ΔG31 NΔG21.On the other hand, Muku and 2 are also the amount of change in the change in temperature when the air conditioner switch is turned on and off. This is the negative amount of change that is expected to be optimal when transient phenomena are ignored when compensating for load fluctuations. Δg622 is a negative amount of change like 6g632, and its absolute value is.

1Δda121>l is y632 1>l 6g62
□ It is 1. Furthermore, there is a relationship of Δmetsu1−1Δnishi21. Next, at B-6, it is determined whether or not one switch of the baddest switch has been carried out, and if the switch has not been carried out, it is instructed to jump to B-11. On the other hand, if switching has been performed, 1 is input to the address M of the RAM 62 at 13-7, and further.

In B-8, it is determined whether the direction of the above switching is off-on (that is, the oil pump is activated from J1 to activated) or on-off, and the direction is determined in B-9 (or B-9) depending on each case.
-1'0), the target opening change amount Δda4, Δhook,, Muda61 (or 442°15□, Δ
42) and address A4 of RAM62 respectively.
．． AS+ Ag is powered manually. In this case, Δζ6 is the change amount of 11 that is expected to be optimal when ignoring transient phenomena in compensating for engine load fluctuations (1'5) for switching the power steering switch from off to on. ΔV43.Δ
1 is the amount of change of 11-, similar to Muku 6.

How big is it?

8041〉Δg61〉Δda51 On the other hand, Δy662 is also the negative value expected to be optimal if transient phenomena are ignored in compensating for the engine load fluctuation caused by switching the power steering switch from on to off. is the amount of change in Δp4. ．． Δda5□ is a negative amount of change like Δg662, and its absolute (direct size) is .

1μg64□1>1Δg, □1>1Δda521. In addition, there is a relationship: yi, , = lΔg621. Next, in B-11), it is determined whether or not there has been a change in the output voltage, and if there is no change, B-17 is instructed.

By the way, when determining the change in the voltage, the amount of change Δvb in the voltage detected by the voltage detection flow F executed in synchronization with the interrupt signal of the fifth timer is input. That is, in the voltage detection flow F, as shown in FIG.
Deviations ΔV1 and ΔV2 of the voltage vb read every cycle t+/2 (M is the deviation between the voltage vb voltage read this time and the voltage Vb2 read last time, Δv2 is the voltage Vk read last time) 2 and the voltage read two times before. The voltage (deviation from
B-11 determines that the voltage vb is in the change layer when the absolute value of All is greater than the set value β. In the case of a variable layer, further A in B-12. It is determined whether 1111i has the same sign as All.

Correction is instructed when l All + Ago l > l Az l. If correction is instructed, then in B-15.

Enter 1 in 7 traces of RAM 62, and then enter B-
At 14, the arrow of A (electron +, direction of change of t b)
and Al in B-i5 (or B-16).
Target opening degree change flattened according to the value of l+AIO, 1. 11.6g6s+ (or Δgua2.Δda82°Δri, 2) is calculated and read from the calculation auxiliary information in the ROM64, and each is stored in the RAM62.

A, and reach B-17.

By the way, if the voltage vb decreases at this time (i.e.

If Al　l+A4　o<　O).

Δ121yI= K+ X F (l All +A+
ol )6g6s+ = 2 X F (l Ath+A
+ol ) Δ1fi, + = Kg X F (l
All 10A, ol) is given. Here, , 2 K3 is a positive constant and there is a relationship of +> K, > K3, and F (l All + AIOl ) is l Al
It is a function of l + A + o l and is stored in the ROM64. Also, when the voltage vb increases (i.e. Al r
+A+ o> 0).

Δ4t = K+ xp' (l A4t +A4o
l)Δasz = K2 XF (l Az 1A+o l)Δd9z = K3 XF (l A
It is given by 10A+o1). Here, to...
3 and F (l Al+4-A, 01 ) are the same as in the case of Δguzuki ~ mu hook.

Also in B-11.

l All 1 <β and in B-12.

If it is determined that l All + Ago l < l All 1, the process directly proceeds to B-17.

In B-17, it is determined by reading the values of 7 traces N, M, and L whether or not at least one correction operation is instructed among the air conditioner switch switching, power steering switch switching, or voltage change, and the above-mentioned When the correction operation is not instructed, that is, when N -1-M0''L=0 (hereinafter, λ control is referred to as 1 control for convenience), B-18 and B
In -19, Air I/Res A3. A6. After resetting A (not necessary if Δ3+Ae and A9 are O), ISC or opening control is selected based on the judgment result of condition judgment flow A in B-20, and IS
If C is selected, A I/Res A in B-21
Read the opening degree mns (the setting of mns will be described in detail later in 1.Y) and set the address As.
1. On the other hand, if opening control is selected, B-2
:1 At this point, read the target opening Ss inputted to Arres Aps (details will be described later regarding the setting of ms), input Arres As K, and then read the actual opening degree r at B-25, and set the value of As and The opening deviation ΔSr can be found at B-24 from Sr.

Also.

When the above correction operation is instructed (hereinafter, control based on this will be referred to as J control for convenience), B-100,'B=2'00
．． Each correction flow indicated by B-300 is executed. In the B-100, the opening correction amount Δ〆ac is set when switching between near cons and inch, and in the B-200, the opening correction amount Δmps is set when switching the power steering switch. The opening stop amount Δsieve associated with this is set, and these values Δg6ac+Δm
ps, m1i (b are integrated in B-40 and input to the target opening correction register g3, and this 6g6s and upper n12?i1i before the start of normal operation (N 10M -1-
At the time of L20), the target opening degree s' is set in B-41 from the first shift of As input in B-21 or (or B-22).Then, in B-42 and 45, this fl
When s' exceeds mmaX, it is set as Is'-1max, and in B-44 and 45, when Is' is less than gmin, it is set as ms'=gmin. The opening deviation ΔOr is determined at B-47 from the actual opening Or read at B-46. By the way, the information on the actual opening degree Sr read in the B-46VC at this time is updated in synchronization with the interrupt signal of the fifth timer and is input to the renostar.

Now, in this way, in the opening control flow B, B
After determining the deviation △Dr from the target opening using -24 or B-47, △lr at the tilt/right valve drive) O-BS.
The opening degree of the bypass valve 2o is controlled so that ->O.

The solenoid valve drive follower BS first determines whether or not the opening deviation △Sr is within the dead band of 11 in B-50, and if it falls within the dead zone, it instructs the valve not to perform opening control (. On the other hand, if .DELTA.96r is outside the insensitivity A1, then in B-51, calculate the Tr for the lens drive 11 corresponding to the absolute value of .DELTA.r.

1/ Load into register. Then, Δl was applied to B-52 at °C.
The direction of control of the valve opening is determined from r, and if △Dr>0 and the valve opening is to be increased, the timer Ta1CTr of the solenoid of the first solenoid valve 52 (hereinafter referred to as the second solenoid) is set in B-53. input, and at B-54, the drive time To preset to the timer Tb of the solenoid of the second solenoid valve 54 (hereinafter referred to as the second solenoid) (however.

To≦Tr), and when the other hand becomes Δ蔚<0 and the valve opening degree is to be decreased, the timer TbK is input in B-55.
Input 'rr obtained in B-51, and input To in B-56. By the way, Tr is given by Tr - To + Ks1 Δgr1 (however, KS is a proportional constant of value) and the driving time t of the second valve 4
b (l1fi input to timer Tb) is ΔFi
It can be expressed as ν for the positive and negative of r.

Moreover, the state of the dilatation with respect to the Δg r of Ta and Tb is shown in FIGS. 5(a) and 5(bl).In B-57 and B-58, the first renoids The second solenoid is driven, but at that time the first solenoid
The magnet is energized only during the drive time set by the timer Ta, and opens the first solenoid valve 52, and becomes non-DJJ magnetic during other times (-1i), and the first solenoid valve 52 is energized.
2, while the second renoid is connected to the timer Tb.
The second solenoid valve 4 is de-energized only during the drive time determined by , and the second solenoid valve 4 is opened, and the second solenoid valve 54 is energized during the rest of the time and the second solenoid valve 54 is closed. Therefore △
When Sr>O, as shown in FIG. 5(c), the opening time ta (value of timer Ta) of the first valve 52 becomes equal to the opening time tb (value of timer Tb) of the second valve 54. 1
1i'j-), the difference between the opening times of both valves ΔtI=ta
-tb, the pressure inside the pressure chamber 26 is reduced by ΔP, and the bypass valve 20 is driven in the opening direction, while Δlr<O
In this case, as shown in Fig. 5(d), the second twist/idb is
11 when the valve opens on 34! ] tb (value of timer Tb) is larger than opening time Ta (value of timer Ta) of the first valve 62, and the difference between the opening times of both valves Δt2 = tb - t
The pressure inside the pressure chamber 26 is increased by ΔP approximately in proportion to a, and the bias valve 20 is driven in the closing direction.
= ta tb = Ks l ΔDr lΔj2
== tb - ta = 8 l Δ'i21'r 1
Therefore, the internal pressure ΔP of the pressure chamber 26 changes approximately proportionally to the opening deviation ΔSr, as shown in FIG. Displaced so that At this time, the gain between the opening degree deviation ΔFir and the actual displacement amount of the bypass valve 20 is appropriately adjusted by the proportionality constant KB.

Now, the setting of each target opening degree mentioned above will be explained.

First, there is one load change, specifically the turning off of the air conditioner switch.
The target opening degree g6s' when switching to ON occurs will be explained.

In this case, immediately after switching the air conditioner switch,
In B-2, N:1. AI=ΔVIl in B-4
.

A2-Δ〆2゜+ A3-Δg3! (Now M
:O.

L20), in B-17 N 10M -1-L
≠0 is determined. So”cn-1o1N=7=
After passing through O, it is determined in B-102 that the current flow is within the fourth time counting from the initial flow in which N: 1 was input in B-2, and in B-105, it is stored in Δmac (register). Δg is entered.

This time's flow is 13-102. In B-105, it is determined that this is the 5th to 8th flow counting from the above initial flow.
When gut 1 is input and it is determined in B-103 that the current flow is 9 times 14 or more counting from the above initial flow, 6g6ac is changed to Δ in B-104.
West, is now entered. And B-107
B-10 when it is determined that N=12, that is, the 12th flow counting from the above initial flow.
8, reset N. As a result, now M=0. l
, = O, so in B-107 N) 11 (N = 1
In the next flow in which 2) is determined, N+ is determined in B-17.
M+L:O is determined, and the correction operation when switching the air conditioner switch is completed. That is, the above correction operation is performed up to the 12th time counting from the above initial flow, but at that time M=0. Since L=0, B-209 and B-209 for Δlps (register) and Δgb<register, respectively.
109 is input (because As and Ao are reset in B-19 before the above initial flow starts), and the value of the target opening correction register Δy6s in B-40 becomes the value of Δ1ZIac. There is. That is, the target opening degree s' is at B-41.

das'=As 10th Δth (however, N-1 to 4) ms'=A
s +Δgz+ (However, N=, 5~B) ms'=As
+ΔS3+ (Now, N:9'-12>.The value of As is now B-2 in the flow immediately before the start of the initial flow.
1 or the target opening degree input in B-22 n5
(96s). The target opening degree 8' changes over time according to the putter 7 shown in the sixth factor. That is, in FIG. 6, the I control state, that is, ISC, or the normal opening control state is shown by the broken line, and the part shown by the solid line immediately after the air conditioner switch is changed is the J control, that is, the transient control (pattern control) when the air conditioner switch is changed. It becomes. In one pattern of pattern feeding control 1, the period is four times the period t of the first timer, that is, 4t.

On the other hand, when the air fan switch is switched from ON to OFF, immediately after switching, A1-Δship, A2-Δg2□, A, :Δg, 2 at B-2, CN-1, and B-4. Then,
Thereafter, the same flow as in the above-described off-on switching is executed, and the target opening degree Vs' is set. Then El s'= As +'l'+2 (j days, N=1
~4) 121s'=As+Δri, □(However, N=5.8
)is' = As +61s2(Idanshi, N=-9
~12). This target opening degree 8' changes over time in a pattern shown in FIG. 7. In this case as well, 1J of one pattern is the cycle of the first timer 1. Nono 4
It's twice that, 4 t+.

In addition, when the power steering switch is switched from off to on, in B-7 of the flow immediately after the switch, M==
1. At B-9, A4 - Δg 41 + A5 "Δg 5
++ A6-Δg. , (now N:O, t, =o), and in B-17 it is determined that N-1-M+L≠0. Then, after passing B-101, Δgla at B-109
c = O (because M = 1 in the previous flow
3 is recentered at B-19).

When B-201 determines that the current flow is within the fourth time counting from the initial flow in which M=1 was input in B-7, B-205 determines that ΔRps is 6.
g641 is input, and the current flow is B-202,B-
If it is determined in 205 that this is the 5th to 8th time counting from the initial flow, in B-206, waste 1. is input, and the current flow is B-2
If it is determined in 03 that the value is 1" or more 9 times counting from the iC initial flow, Δ 61 is input to Muku pS in B-204. Then, in B-207, when it is determined that M=12, that is, the 12th flow has occurred several times from the upper dC initial flow, M is recessed 1-1 in B-208.

As a result, now N:O, L=O, so M>11 (M-12) is determined at B-207.In the next flow, N10M+L=O is determined at B-17, and the power steering switch is The sode movement ('1) at the time of switching is designed to end.In other words, in this case as well, as in the case of switching the air conditioner switch, up to the 12th time counting from the initial flow is the upper 6C supplementary II operation.And Since L20, Δda b =
o and Natsu-C, therefore.

The target opening degree disc Δ12tsO value in B-40 is the value ΔyIps. That is, 1:1 opening degree s
'teeth.

In B-41.

ms'=As +Δl<+ (However, M=1 to 4)l
s'= As +Δg, + (Itanshi, M:5~B)9
5s'=As+Δ1sI (however, M=9 to 12). At this time, 96s' changes according to the pattern shown in FIG. 6, similar to the one set when switching the air conditioner switch from off to on.

(However, in Figure 6, Δg → Δg, 1. Δg 2. →
Δg 51 + Δg 631 → Δg, l)O On the other hand, when the power steering switch is switched to ON/OFF, at B-7 immediately after switching, at M: 1.13-9, A4-MUKU 42. As−mu弗2+A6−Δ〆=2andir”,)
, After that, turn off the power steering switch mentioned above →
A similar flow is executed when switching to λ.

Set the target opening degree s'. And 96g'=As +Δ96a□(Itan, M=1~4)
S s' = As +6g6st (Itanshi, M=5
~8) ms'=As +ΔIZ'62 (Itanshi, M=
9 to 12). At this time, the glue s' changes according to the pattern shown in FIG. 7, similar to that set when the air conditioner switch is turned on and off as described above. (However, in Figure 7, Δmark 2 → Δda, 2
．． Δ9622→Δg, 2. Δg32-2Δg662) 0 again. Turn on the headlights and check the battery voltage■
If a sudden drop in b occurs, the battery commercial vb
B-1 of the flow immediately after the drop occurs, L ~ 1 at odor
．． In B-15, A, =Δgua+++Δu'-48(
A9-Δg,1 (now N:O,,M=0).

In B-17, N 10M 1L-70 is determined.

Then, after passing B-101, at B-109 Δguac=0
．． After passing through B-204, Δamps = 0 at B-209, and then at B,'+04, the flow of ゛C now H becomes 1.
In 3-16, L-~1 is input and it is determined that it is within the fourth time counting from the initial flow.B-30
In step 5, ΔV month is input to mb.This flow is 8.
502. B-505 10 Counting from the above initial flow 5 times 11 to 8 times When it is determined that it is 1-1, Δ12'llll is input to Δgb in 8-5 CJ 6, and this time If it is determined in R-505 that 11- is the 9th time or more from the initial flow, Δg, 1 is input to Δgb in step 8304.

When it is determined in B-107 that L=12, that is, the 12th flow counting from the initial flow, 7 is reset in B-308. As a result, now N=o and M=O, so in the next flow where L>11 (L=12) is determined in B-407, B-
On the 17th.

N+M+L, . . . O is determined, and the correction operation for the change in battery voltage vb is completed. That is, in this case as well, the above correction operation is performed up to the 12th time counting from the initial flow, as in the case of switching the air conditioner switch and the power steering switch. Since Δda ac−Δaps=o, the value of mug S in B-40 is the value of Δmb. That is, the target opening degree S' is at B-41.

gB'=As+Δg7+ (However, L=1 to 4)l s
'=As +Δgs+ (However, L-5 to 8)gB'=
A6 +6g69+ (RunjL,, L=9~12
). Now the value of A, s is the initial flow start i18+
This is the target opening degree mn5 (daS) input at B-21 or B-22 in the flow of the song. The target opening degree S' changes over time according to the pattern shown in FIG. In Fig. 7, the broken line part is ■control, that is, ISC or normal opening control state, and the solid line part after battery voltage ■b suddenly decreases is J control, that is, transient control (pattern control) when battery voltage changes. It has become. And +N of one pattern in this pattern control! It becomes four times the period t1 of the i11 timer, that is, 4 t+ (・ru.) In Fig. 8, the battery voltage ■b suddenly recovers and then gradually recovers because the alternator has started generating electricity. (＜Mono de E, Otsu.

On the other hand, if a sharp rise in voltage (b) occurs after extinguishing the power lamp etc., L=i at B-15 and A7-Δl at B-45 after the city use 111'I.
Z'72, As-Δ(ls2.A,=Δg,2. After this, 70-, which is the same as when the battery voltage ■b decreases described above, is executed, and the opening degree Ds' is set. Then.

l s'w As 1Δg6t2 (Itanshi, L: 1~4
) g S', = As + Δ g8 □ (however, L-5 to 8) l
s'= As +ΔSqx (However, L=9 to 12')
becomes. This fls' changes over time according to the pattern shown in FIG. Note that the reason why the battery voltage Vb gradually decreases after rapidly increasing in FIG. 9 is based on the fact that power generation by the all-kinator has been stopped.

Next, a case will be described in which one transient control is started while another transient control is being performed.

First, after the air conditioner switch's off-on UJ conversion is suppressed (
Table 1 shows an example of a case where the power steering switch is switched from OFF to OFF after 2t+).

Table 1 In Table 1, the small box in the column of progress between 115 and 115 indicates the number of times 70-B was played 11 times at a certain point in time. Therefore, one period t and this Leo's treetop correspond to the passage of real time. In the following, the elapsed time is 1t1゜2tl...
The time corresponding to ... is time 1 tl, 2 tl
Expressed as... Now, according to Table 1, time 1
At t+, 2t1, N=M=O, and ■control, that is, ISC
Alternatively, normal opening control is instructed. At time 5t+, switching of the air conditioner switch is detected and the signal becomes N21, instructing J control, that is, transient control. Normally, this J control ends by time 14 tl, which is N-12, but in this case, switching of the power steering switch is detected at time 5 tl, and M=1, so the above J control ends at time 14 tl, which is N-12. 12
This will continue until time 16t1. Therefore,
In Table 1, time I LI+ 2 tl and 1
■control is instructed for 7t+ and 18L+, but other than that (
1+ to 16t1), J control is instructed.

Then, at the start of J control 5t1 and thereafter (time 4
Since M=0 at t, B− of ta+ in FIG.
Δ1 psK at 209.

is input at time 2 t, the previous flow B −
This is because A6 is reset in step 19.

On the other hand, J is reached at times 15t+ and 16t+ near the end of J control.

1'J=Q, but since ∆31 is input in A3, ∆31 is input to ∆aaC in B-109.
, is input. That is, B in Figure 4 ta) during J control execution.
-40, the data input to the target opening correction lens tag S is as shown in Table 1. Therefore, the target opening l2Is' set at B-41 is as shown by the solid line in FIG. By the way, the small opening 11 indicated by this solid line is set corresponding only to the target opening (dashed line) which is set corresponding only to the switching of the near cons inch and the switching of the power steering switch. Needless to say, it is the sum of the two-dot chain line).

Next, 6t from switching the air conditioner switch on/→off.
Let's take the case where a sudden decrease in the voltage vb is detected after a period of time has elapsed, as shown in Table 2 and FIG. 11.

Table 2 There are other examples where one transient control is being performed while another is started, but they are all the same as the two examples above (including cases where three transient controls overlap). is executed.

Next, the setting of the target opening degree Os during normal opening degree control will be explained.

The target opening degree ms is basically based on the da0 input to the address AOO as the initial position information of the bypass valve 2o, the cooling water temperature, the idle switch, the engine speed, and the throttle valve opening degree (and its rate of change). Accordingly, the information is input into the normal map of the ROM 64.
It is set as so.

A correction is added to this according to the driving state, and is given within the range r111m1n≦g6s≦1max. When the air conditioner switch is turned on, the above flegso is
3. is added to the address Aps, lso+Δg, 1
is input, and when the power steering switch is turned on, ∆l'61 is added to 80, lso + ∆g is input to Aps, and the headlights are turned on. In some cases, gsoVC Muda,l is added and Meso+Mφ,1 is input to Aps.On the other hand, if the actual engine speed Nr<50 Orllm is determined in A-1 of condition determination flow A, the map The reading from is stopped, the opening degree of daS becomes close to that of the fully open state sma shop, and if it is determined that it is time to start at A-0, the upper δcj11
Reading from the current map is aborted, Is = 9
6start is set separately, and 1start is the optimum setting for starting the engine in 8 to 17). It should be noted that the settings are based on this group.

Next, the setting of the target opening degree ns during ISC will be explained.

When setting Ins, ′ is the second timer interrupt (K ”
The rotation speed setting flow C executed by J is used. First, set the rotation speed as shown in Figure 2) □-C is C-
= 1 (・The actual rotation speed Nr is read/read into the screen,
At C-2, the target rotation number NS is read into the register. This 1:1 standard rotation speed NS is set to change as shown in FIG. 12 in response to switching of the cooling water +llX and the air conditioner switch, and this is input into the ROM 64 as a map. Then, in C-3, the rotational speed deviation ΔN and the rotational speed change amount DN are calculated, and C-3
-4, the target change amount In is calculated based on a7'J and DN.

Furthermore, the actual opening degree Sr is read at C-5.

At C-6, the target opening degree ΔS is determined from dr+Δgn. At this time, the actual opening degree f read in C-5
ir is updated in synchronization with the interrupt signal of the fifth timer and input into the register.

Then, mns is modified as necessary so that it falls within the range of min ≦ men s ', 'lrr + ax at C-7, C-8, C-9, C-I O, and then C
-11 to 16 is input to Iatores master nsK. By the way, the detailed flow in C-1 and C-4 is shown in Fig. 15, and in C-5, the target rotation speed N is set at C-51.
B and the actual rotation speed Nr are read and ΔN is calculated from the difference between them, and in C-52, the Nr read in this time and Nr' input in address An in c-35 in the previous flow are calculated. VC is set so that DN can be calculated as the difference. In addition, in c-4, when starting the engine, the RAM (a of S2) to which 0 is input as an initial value is stored.
The response P is judged by C-401. After that,
C-402K determines the magnitude of the absolute value of the amount of change DN, and when it is determined that DN is thick, C-41
3, determine whether the deviation ΔN is in the dead band or not,
Δmn (hereinafter referred to as Δ96na) is set in C, -406 according to the size of DN to determine that it is outside the dead zone, and in C-404 to reduce the fact that KC405 is executed. Input 1 to 71-res R of RAM62, and then input J=y to C-405.
The cumulative value 61't of Δguna obtained in is entered into AIL・S Ae to arrive at C-5. On the other hand, DN in C-402
If (absolute value of) is small and 1'1j cannot be determined.

Furthermore, in C-406, C~403 was executed on the R ship, i.e., jf+times fO-, but the fortune-telling was determined, and if it was determined that it should have been executed (i.e., R-0), C-407V
Δmn (hereinafter Δmn
b) and reach C-5.

On the other hand, if it is determined in C-406 that C-403 has been executed (hitting R≠O).

In C-408, Δdan (hereinafter referred to as flnc) is set according to the value of 7 tres Ae and the magnitude of ΔN, and further, address R is reset in C-409, and address R is reset in C-410. Input the natural number in P (5 in the first self-diagram), reset Ae in C-411, and reach C-5. In the next flow that became P25, C
-401, P≠0 is determined, and in C-412, P's (lI'i is subtracted by 1, and then in C-407, (
- Δgnb is set according to the time N, leading to C-5.

And - if it becomes a giant P-5, what about C-4'? , -2, execute C-407 until P20 is manually powered.

Then, if P'=O, then C-402 and C-,
Based on the judgment of 406, C-403, C-408, C-4
07 is selectively executed. In addition, when the deviation ΔN is in the dead band, ΔL;1n is applied to C-414 via C-413.
a=o, and by setting C-1c17 again, ΔΔgnc
= o.

By the way, when the absolute value of DN becomes large, C-403
Δmna (small mna is continuously set as necessary, but in that case, the sum of Δmna) set by There is. On the other hand, when the DN value becomes small after Δdana is determined by C-40, Δgnc set by C-408 is 2, jjirl) dog i+1iIL
Compensate the quantity above all.

thlnc == -Kn X Δmna. Here, Kn is the function N(+) - (ROM 6
4 is input, O<Kn<, becomes 1 and becomes t6, and △φ
If na is set continuously, βnaσ) sum ΣΔ
rij18.

Figure 14 shows the settings Δρna+Δgn as described above.
b. An example of isle rotation speed control performed based on ΔgnC. In addition, in Fig. 14 (1 standard rotation speed N
The shaded area including 3 indicates the dead area (1), and the timer signal means that the interrupt number of the second timer is 1° or more.As described above, the engine output adjustment based on the opening control of the bypass valve 20 is described.9 Next, a description will be given of the injection amount adjustment of the fuel injection device 12, which is performed together with the opening degree control when an output fluctuation occurs in the engine. In this fuel injection device 12, a solenoid valve is subjected to tute control to set a fuel injection amount, and the setting is executed based on a fuel supply flow D.

In flow D, first, in D-1, the intake air amount Wa, the intake air temperature Ta, the pretext rotational speed, and the cooling water temperature ~ are read.

And in D-2, these Wa, Ta, Nr,
Based on Tw, the fuel injection amount 120, the normal solenoid valve driving time (the cycle of Tute control (and the pulse Illθ), and the force (set). At this time, the period H is proportional to the intake flow rate Wa.
Set by the output pulse signal of the flow sensor 42,
The pulse [1] is set according to the period H, and the normal correction amount θn added (subtracted) to the basic pulse width θ0 is set based on the map in the ROM 64 from Ta r Nr + T%V. The normal solenoid valve driving time Zn corresponding to the optimum fuel injection iGn at the time can be obtained. In D-5 and D-6, fuel correction control is performed when an output fluctuation occurs in the ennon. First, in D5, when the air conditioner switch is switched from off to on, the pulse The correction amount θac is calculated, and in D-4, when the power steering switch is switched from OFF to ON, the correction error θps during the pulse is t? served,
At D-5, electricity is generated... A sudden decrease in the voltage is detected, and at F-2 and F-s of the voltage detection flow F, :C
, l (Slide, A+ + +, A+. If the sum of 1 and 2 is less than 11)1 desired value, pulse 1+? +h +1-quantity θb is 1fl! Furthermore, in D-6, the actual rotation speed Nr suddenly changes during ISC.
! ! ! 2 rotation speed change amount DN (1〆1 becomes a large value t In this case, the pulse +lJ correction amount 0d is calculated.These correction amounts θac, ops, θb, and θd are all values that instruct an increase in the amount of fuel when the respective output fluctuations occur.And In D-7, D-ro~ is added to the normal pulse width θ (θO + θn) obtained in D-2.
The correction amounts θac, θps, θb, and θd obtained in D-6 are added, and the pulse width after output fluctuation compensation = 00+θ□108. 10 ps, 10 b, and θd are set. (In D-ro to D-6, when no output fluctuation is detected, the correction amount during the pulse is 0). Further I)
-8, the solenoid valve drive time Z is formed by the period H found in D-2 and the pulse width KM found in D-7.
The solenoid valve is activated.

By the way, the details of the flow from D-5 to D-6 are as shown in Fig. 15. First, the correction is based on the switching of the air conditioner switch, but in D51, the switching of the air conditioner switch from OFF to ON/OFF is performed. In B-2 of the opening control flow B, it is determined based on lll'j of the open control flow B, and if it is, in D-42, the address of the RAM 62 is set to a natural number 0.
1 is input, and further, the initial correction faXI is input to the register θac at D-55.

After -B, K, and 20, in the 01th flow, ≠O is determined at D=34, and the correction value continues to be input to the register θac at D-35, and so on.

The pulse mode is set at (1) -7 of the star θaC. At this time, θaC ([^ is set at D -55- so that it gradually decreases as time passes after the air conditioner switch is switched and the initial Sleeve II value is given. The air-fuel ratio of the air-fuel mixture supplied to the air-fuel mixture becomes -tl smaller (the air-fuel mixture becomes richer), and then gradually increases (the air-fuel mixture becomes leaner). If the above-mentioned J conversion is completed or if the above J conversion is not completed, θaC is re-centered at D-56.

Also, turn off the power steering switch by pressing D-4.
This is an auxiliary IF based on switching to on, but this is based on the value of address M input at B-7 of opening control flow B, depending on whether or not the bow steering wheel is switched to off->blade in D-41. If there is a switch, the same correction as in sleeve 1F based on the near cons inch switch is performed. However, D
n2 (a natural number that sets the number of correction flows) is input to address 2 at -42 and register θp at D-43.
X2 (initial correction value) input to s is set independently of nl+xl to be optimal for correcting load fluctuations due to switching of the power steering switch. Further D
This is a correction to be made when the voltage (2) suddenly decreases, but this is first done at D-51 (addressed at D-51 and input at B-15 of the opening control flow B) from O to 1.
Determine whether there has been a change.

If there is a change, D-52 indicates the magnitude of the voltage change ΔV.

If Δ■2 exceeds the negative set value ΔVS, it is determined whether it is an object or a cup, and if it exceeds ΔVs, the above air b switch,
Correction for voltage changes is performed in the same way as correction when switching the power steering switch. By the way, in this case as well, n3 (a natural number that sets the number of times of correction flow) inputted to the address KBiC at D-55 and Xa (initial correction value) inputted to the /scroll θb at D-54 are /. It is set independently of the above nl+n2+X1+'x2 so as to be optimal for correcting the l-1'5 load fluctuation. Furthermore, I carried out in D-6
Actual rotation speed Nrσ during SC) Sleeve +E when suddenly decreasing
However, first, D-60 determines whether or not transient control based on voltage changes such as switching of the air conditioner switch and power steering switch is being performed. R (rotation speed setting flow Cd
) C-404 to determine whether there has been a change of 0-)1 in ), and if there has been a change, change the rotation speed change DN to a negative set value DNs in D-62. Z) or fortune telling? Judgment is made, and if the DNs is exceeded, D-65 is further used to judge whether or not CI SC is in the position (based on the judgment result for '1 judgment flow), and Isc is in the position -(((
・When changing the air switch/switch, ・Wrinkle 7, switching the source inch, ・In the case of a sudden decrease of -1
+Ii In the same manner as in 11, compensation for a sudden decrease in idle speed is performed. By the way, in this case too, 71- with D-64.
na (a natural number that sets the number of times of the correction flow) input in response 4 and Xa (initial correction value) input in register θd in D-65 are calculated as the opening of the bypass valve 200 increases when the idle speed suddenly decreases. The above nl + n2 r n3 + XI +
It is set independently from +X3. FIG. 16 is a time chart regarding the injection amount adjustment of the fuel injection device 12 provided with the above-mentioned correction. In Fig. 16, the electromagnetic valve driving time Z increases and the fuel injection amount increases based on the sudden decrease in the hunting voltage, and II and IV are I.
It shows how Z increases based on the sudden decrease in rotation speed during SC,
3 shows an increase in Z due to the switching of the air conditioner/sinch and power steering switch to off-hook on.

According to the above embodiment, a ponnon sensor 5B is provided to detect the opening degree of the bypass force 2o, and the setting is made based on the actual opening degree Xr detected by the sensor and the rotational speed deviation during the fitting operation of the ennon. The upper 8C hyper Z valve 200 opening degree is controlled by the opening deviation ΔSr from the standard opening degree T18 so that the engine rotation speed Nr becomes 1 standard rotation speed NS, so the 1 rotation speed control is extremely quick. This has the effect of effectively preventing problems such as engine stalling during idling.

Furthermore, in the above embodiment, when a sudden change in engine speed occurs during ISC, a larger correction opening is set according to the amount of change and the opening of the bypass valve 20 is controlled, thereby quickly resolving the sudden change. death.

Next, I hope that the sudden change mentioned above will be resolved.
] After setting If to a small value and controlling the opening, set the opening limit to <1.1 based on the rotational speed deviation of the federation.
) η, the pulsation of the idle speed can be quickly removed, resulting in the effect that the idle speed can be stabilized extremely quickly.

Furthermore, in the 18C embodiment, including the ISC time: 1-
When the on/off switching of the air conditioner switch (or power steering switch) is detected while the engine is running, this function is used to offset the load fluctuation caused by driving the air conditioner gono press (or power steering hydraulic pump).

The bypass valve opening is controlled according to the optimal opening pattern predetermined based on the foot bank of the pump sensor 58 (a), and the intake air amount is adjusted. Fluctuations in output (idling speed and torque transmitted to the drive shaft via the flanch) can be kept to an extremely small level.

Furthermore, in the above embodiment,...
The occurrence of the generation load of the alternator and the disappearance of the generation load of the alternator are detected from the fluctuations in the voltage vb, and the control opening degree is set in stages according to the amount of change per unit time in the above-mentioned voltage vb. The VC configuration controls the opening of the bypass valve and adjusts the amount of intake air according to the engine speed, so fluctuations in engine output (idle rotation speed and torque transmitted to the drive shaft) due to the generation and disappearance of a power generation load are minimized. It's something you can do to keep it to a minimum.

Further, in the above embodiment, when it is detected that the auxiliary equipment driven by the engine, that is, the air pump/pressure pump, the power steering oil pop/pump, or the oar pump, starts to operate, the injection amount of the fuel injection device 12 is temporarily reduced. Since the structure is configured such that IF increases, an effect is achieved in that engine stall is prevented when the load torque suddenly increases. This is executed at the start of each hha drive, and together with the effect of increasing the amount of intake air based on the drive of the IPA intake valve 20, it exhibits a very large effect.

Furthermore, in the above embodiment, when a sudden decrease in the rotational speed is detected during ISC (that is, when DN becomes a large value of !Q), the injection amount of the fuel 11C1 controller 12 is temporarily increased. With this structure, it is possible to prevent engine stalling when the rotational speed of the fin ring suddenly decreases. This is executed in response to a sudden decrease in rotational speed.7. )/・
Combined with the effect of increasing the amount of intake air in the IPASF F 20147 movement, this has an extremely large effect.

Further, according to the above embodiment, the output of the pump sensor 58 corresponding to the initial opening position (fully open position) K of the bypass valve 20 is A/D converted and sent to the computer 4o as the initial position information of the bypass valve 20. Since the configuration is such that the bypass valve 20 is controlled 11 degrees based on this initial position information, the initial position information of the Ibus valve is read for each engine during engine manufacturing, as in the past. There is no need to input data into a computer, and the effort required to make two, two, and silk steps is reduced.

Further, according to the above embodiment, the address Aoo of the RAM 62
gmin and 1max are set based on the initial position information input into the ROM 64 and the information f21band and gΔ stored in the ROM 64, and the opening degree of the bypass valve 200 is mechanically set to be slightly less than the minimum opening degree (fully closed state). a opened to
It is configured to be controlled within a range from min to a mechanically set maximum opening (from fully open to max, which is slightly closed). The magnitude of the negative pressure in the pressure chamber 26 and the
Since it is uniquely set at the equilibrium point of the force exerted by The pressure control in the pressure chamber 26 based on the drive of .14 is performed quickly, and delays in opening control are prevented.

Furthermore, in the above embodiment, a check valve 57) is provided in the self-pressure passage 28 to allow fluid to move only from the first valve filter 2 side to the intake passage 8.

Even during start-up cranking when the manifold negative pressure is small and fluctuations are large, the absolute same color pressure (target is relatively large). Since the air is sucked and maintained in that state by the non-return check filter 5, a relatively large negative pressure is applied within the pressure chamber 26 even during the start-up.

-・The opening degree of the Ibus valve 20 is set in advance to 15t.
This makes it possible to bring the engine closer to art, thereby improving the startability of the engine.

Furthermore, in the embodiment described above, the manifold negative pressure conducted to the pressure chamber 26 is controlled by the first solenoid valve 2, and the atmospheric pressure conducted to the same pressure chamber 26 is controlled by the second solenoid valve 34. Since the pressure within the pressure chamber 26, which is proportional to the opening degree of the Ipass valve 20, is set based on the difference in drive time of both the renoid valves 52 and 34,
The limit on the minimum driving time, which was a problem when driving with a single solenoid valve, has been removed, and even if the opening deviation Δgr is minute, the pressure inside the pressure chamber 26 can be accurately adjusted in response to the minute deviation. The pressure, that is, the opening degree of the Ibus valve 20 can be controlled, and in ISC, the rotation speed is quickly stabilized, and on the other hand, the opening degree control is also linked to optimization of the opening degree of the Ibus valve 20. It has the effect of being quickly irritated.

Further, in the above embodiment, the air conditioner switch 50a.

When all of 50b and 50c are turned on and the air conditioner is ready to operate, an air conditioner on signal is immediately input to the computer 40, and based on this signal, the engine output correction operation related to air conditioner switch switching, that is, the bypass valve 20 is immediately performed. While the opening increase control of the air conditioner switch 50a and the fuel increase control of the fuel injection device 12 are performed (f), the air conditioner switch 50a,
511) A delay circuit 55 is interposed between b and 50c and the power transistor 55, and the drive of the compressor will be performed after 115 minutes have elapsed after all the user control switches are turned off. and J
: Since the operation of the ttC control sensor is started after the above-mentioned output auxiliary IF movement 1'1 has been reliably performed, the occurrence of an abnormal decrease in the engine output after the start of the control sensor operation is prevented, thereby improving life safety. As well as improving! 11. During the fitting operation, the occurrence of a stall due to an abnormal decrease in the rotational speed is prevented.

Also, air conditioner switches 50a and 50b.

When at least one of the air conditioner switches 50c is turned off, the engine output correction operation related to the air conditioner switch changeover, that is, the opening reduction control of the bypass valve 2o is performed immediately, while the compressor operation stop is delayed due to the action of the delay circuit 55. Since the compressor stops after the upper Re output correction operation has been carried out, the engine output is prevented from increasing abnormally after the compressor has stopped, and the driver This will reduce the improvement in performance.

Further, in the embodiment described above, the 1 idling/g operation state of the engine is detected when the vehicle is stopped based on the outputs of the idle switch 48 and the vehicle speed sensor 54, and the idle ignition pulse signal output from the idle switch 4B and the single sensor 54 is detected. Since the configuration is configured to detect the idling state of ENO/N when the vehicle is running based on K and to perform ISC in both cases, it is possible to perform ISC not only when the vehicle is stopped but also when the vehicle is running. This has the effect of stabilizing the idling rotational speed and preventing engine stall while the vehicle is running.

In the above embodiment, the target opening degree 0start at the time of starting has been explained as a fixed value, but the target opening degree 0start at the time of starting may be configured to read a different value depending on the temperature of the engine.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram showing an embodiment of the present invention, Fig. 2 is a schematic flowchart 1 of the operation of the embodiment, and Fig. 6 is the actual opening degree of the Ipass valve 20 in the embodiment. A diagram showing the relationship with computer information, FIG. 4 is a detailed flowchart of the opening control flow B of the same embodiment, and FIG. 5 is a diagram showing the operating characteristics of the first and second solenoid valves of the same embodiment. , 6th
Figures 11 to 11 are diagrams showing the transient control characteristics of the Neubus valve opening in the same embodiment, Figure 12 is a characteristic diagram of the target rotation speed NB according to the same embodiment, and Figure 13 is a diagram showing the characteristic curve of the target rotation speed NB according to the same embodiment. FIG. 14 is a partial detailed flowchart of the rotation speed setting flow C, and FIG. 14 is a diagram showing the rotation speed control characteristics according to the same embodiment. FIG. 15 is a partial detailed flowchart 1-1 of fuel supply flow D according to the same embodiment. FIG. 16 is a diagram showing fuel supply characteristics according to the same embodiment. 2.Engine body, 8.--Intake passage. 10. Sotol valve, 12. Fuel injection device. 14... Air flow meter, 18... Ibus extension. 20... Bypass valve, 22 Pressure response device. Ro2...First solenoid valve. 33 ・Check valve, 64 ・Second solenoid] valve. 66 spring, ro8 bo, 'nyo no se, the. 40...computer, 42]-af o-I
H7→No. 43・Intake temperature sensor, 44 Ignition device. 46...Cooling water temperature sensor, 48 Eye 1 Notes Inoi-150a, 50b, 50cmz Acons Suisosen. 52...Bawastes Inch. 51...Compressor, 53...Delay circuit. 57... Hatteri Figure 6 Figure 7 Work completed Gong Sui Y Qi 1-111, 5□-11111- (8-was 1000 sui 7乎) ON Figure 8 Figure 9 Fu O Zuren 11 Shiro%/1. -m〆1- n fZ

Claims (1)

[Claims] A throttle valve installed in an intake passage of an engine. one end communicates with the intake passage downstream of the throttle valve,
The other end is connected to the intake passage upstream of the throttle valve or to the atmosphere, and is interposed in the bypass passage to control the flow rate of intake air passing through the bypass passage.
Ipass valve, a pressure response device that has a movable bulkhead linked to the bypass valve and a pressure chamber partitioned by the movable bulkhead, and sets the opening degree of the bypass valve according to the magnitude of the pressure acting on the pressure chamber. . A negative pressure passage whose one end communicates with the pressure chamber and whose other end communicates with the intake passage on the downstream side of the throttle valve and which conducts the negative pressure of the intake passage on the downstream side to the pressure chamber, is interposed in the negative pressure passage. a control means for detecting the operating state of the engine and driving the solenoid valve according to the detection result to control negative pressure acting on the pressure chamber; In the engine, the intake flow rate of the engine is adjusted by driving the bypass valve according to the operating state of the engine. An intake air amount control device for an engine, characterized in that the negative pressure passage is provided with a check valve that allows passage of fluid only from the pressure chamber side to the downstream intake passage side.