JPS606055A - Engine control unit - Google Patents

Abstract

PURPOSE:To precisely perform the exhaust reflux control or idle control by feedback-controlling the opening of an exhaust reflux valve and a throttle valve to the preset opening. CONSTITUTION:A control circuit 6 detects the operational condition based on signals (a), (b) from an engine speed sensor 7 and an intake air negative-pressure sensor 8, reads out the required opening Lmap of an exhaust reflex valve in response to the operational condition from a memory 20, and detects the displacement L of the relux valve based on the signal C from a position sensor 9. When the actual displacement Lact=L, it is inputted to a comparator circuit 32 together with Lmap. When Lmap>L, a control signal (d) is outputted to a control valve 5 from the circuit 6, the negative pressure applied to a negative pressure chamber is increased, and L is made equal to Lmap. In addition, when Lmap<L, a signal (e) is outputted to a solenoid 5b to lower the negative pressure, then L is made equal to Lmap and the reflux control is performed precisely.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention is applicable to engine control devices, 1/11 air flow control tall devices, j fiddle control devices, etc. M i
Regarding equipment designed to achieve accurate control,
. (Conventional technology) 7-fiddle system? 11
The first equipment detects the displacement (L) of the control member of the II air reflux valve []] and the curve (i'
The noise back control 111-ff is depicted so that r becomes a preset value depending on the operating state, but in these controls, it is difficult to accurately detect the displacement of the control section H described above. There are 1,000 requirements for achieving highly accurate control, but the method for detecting the displacement of this control member is as follows:
few phrases

[01 level 1 due to pull error, wear, thermal expansion, etc.
There may be a change in the number, and the output 1j11 is 1k(0), and the output 1j11 is 1b+;! : Due to the harshness of 1 and -C, the output horn of the range is controlled 611 parts (the actual 1 prefecture change 11 of A is shown in iF 4TI), (this causes the control t+'i degree to be low). J, who has many reasons to be depressed,
For example, [3 [JP-A-571-38]
753 ``4Jl of 1 exhaust J7 flow control equipment in the r publication)
``The closing of the flow of water'', ↓ prefecture position white movement supplement if +'< position is 1
;? It has been proposed. This device 1'1 automatically corrects and correctly corrects the IJI air flow valve flow elevation/closing early/lower position (1'' (C exhaust recirculation control...1). (
], this device (, 1 fully closed let r (1st place buy, immediately J5 zero point sleeve jI (there is a game, so Renly's take (=
There is a problem with J error and wear curve, but it is possible to deal with this when there is an error in the slope of the output point value with respect to the detected value. (Object 1-1 of the present invention) The present invention provides a method for controlling IJI air flow control 1'!i 1flr.
3- Exhaust far-flow lift or noidle control system: 1N
31-Jru Throat 1-Control of Throat Valve, etc. 815 Month Change 1)
When the displacement of the control member is detected using the feedback system 11, the displacement of the control member is detected.
Output 1 containing both j and gradient:! By automatically correcting the r property, the aim is to always control the JJI air flow suspension or the nodule rotation speed with high precision. (Construction of the present invention) The engine control device according to the present invention is constructed as follows in order to achieve the objectives set forth in Jl. First, the device according to the present invention (1) basically consists of the following steps as shown in FIG. exhaust)! A control member △ that controls the operating state of the engine such as the flow up, flow, and D y l valves, and the control member A
The main change detection stage 1-3, which detects the displacement of
An operating state detecting means C for detecting engine operating states such as tr number loss and negative intake pressure, and the above-mentioned control variables 4i1 corresponding to each operation and state are stored in advance. The difference between the displacement exuded from the storage device and the detection degree output from the -1 displacement detection means 13 is calculated by dividing the difference by +111. ((/
Displacement control means 1 that controls the control member Δ to reduce the displacement difference to zero and receives the output of the control means 1-. As a result, the displacement of the control member △, for example, 4 Jl air j W flow) 1
The noise back control 211 is performed so that 1σ of the torque 1゛ corresponds to the operating state (J, ゛, which is the preset opening degree). B1. Therefore, in the present invention, rbC(,1,l' i+t+B
': In addition to (, history, control section +4 A (1) 'ls
i :1-IL”J) 27) (Ohen KJ,,YI
! ') 1st. 2nd set displacement to detect people 1st. The second setting displacement detection means G, l-1, and these ita! Output means G, ll are people first. The above raw change I'l of n4 that detected the second setting displacement
The first one stores the detected displacement outputted from the detection means 13, respectively. Based on the stored values of the second storage means], J, and both storage devices 1° and 1, the detected displacement output from the detection means (-3 is supplemented by i[?Jru 11 Means 1 <Toga f
liii can be obtained. This correction means l (is 113 displacement detection 1 when the displacement of the control member Δ is at the 1st and 2nd set displacements)
The output 'I4j t'l of the detection means 13 is exclusively obtained from the detection level I1'l (output horn l111) of the stage l(), and this !lzI111 or a predetermined ! do,
When increasing the error, make a correction by 1J to avoid matching the second base standard characteristic. As a result, the displacement of the control member Δ is easily controlled so that the detected displacement output from the y-y-y displacement detecting means I3 is equal to the required displacement detected from the main memory []. One main memory device corresponds to the specified displacement. In addition, the first ten. The second prescribed displacement detecting means G, 11C is the first displacement detecting means G, 11C of the 11th control member Δ. Second
It is desirable to use a switch to detect the setting displacement in the positive M port J, and to improve accuracy, the first switch is used. As for the second set displacement, it is desirable to select zero displacement (fully open state) and maximum displacement (fully open state) of the control member Δ. (Example) The present invention will be explained based on the embodiment of the present invention with respect to the exhaust gas recirculation system 1j1. As shown in FIG.
JI trachea (illustrated 1! λ is communicated 1) 1 Qi reflux passage 3, said passage 3 Negative moon installed in soil: Taino) Noram style IJI qi far flow valve ↑ 4, etc., said valve 4 +Ij in negative moon room 48
It includes an electromagnetic control valve 5 which controls the output of the valve 4 by applying the supplied control negative pressure, and a control circuit 6 which controls the control valve 5. Zuru. This control circuit 6 includes 1
The engine speed to detect 292 rotations is 7 or 1, 1 - intake fjJ (1 to 11 meters).
Intake negative 110 that detects the intake negative sign on the lower dj side of the tool valve
Ihe bow 1) from Nri 8 and -1 ki 1 no 1 ki)! flowing jc
'll receives the signal C from the position sensor 9) which detects the displacement of A5()/noram 711), that is, the opening degree of the valve 4, and -1-open signal a. , 1]
In addition to determining the operating condition rμ, compare the opening degree of the valve 4 with the JJI airflow valve flow rise parallelism fff1 degree stored in advance and corresponding to the operating condition. , the first according to the difference between the two. 2nd control ipa rJ, a of the above type)
The first point of strict control ji゛j). 2nd solo 1st maid 5a, 5b
7, the first solenoid 5a receives the first control signal (j) (by closing the valve body 5C, the first solenoid 5a
- Air distribution intake pipe 1] - 1 - 1 ~ Lef r 'F flow side/) Intake negative pressure introduction path ' 10 and 1 J Nol Controlled to air flow valve 4: Negative pressure supply path 11, etc. that is supplied is blocked from communicating [
The second solenoid 51 receives the second control signal (!) and avoids the opening/closing operation of the valve body d. The pressure introduction path 12 and the above pressure supply path 11 are controlled to shut off heavy oil.
The control angle F'g supplied to the first chamber 48 is rolled, and Cdar)'nonono\41) moves against the spring l\C according to its size. 1'JI! Lubu? Body 4 (1
The opening degree of the fin is controlled to match the above-mentioned fin degree. Accordingly, in this embodiment, the above-mentioned 1) air flow valve 1 is provided with a shut-off switch 113 for detecting the fully closed state of the valve 4 and a switch 14 for detecting the fully open state of the valve 4. , the full open signal output from these switches 13 and 14 is manually input to the control circuit H4g or L (3).Next, we will explain the control circuit 91! circuit (1111 configuration in 3). As shown in Fig. 1, the output of the engine rotational speed register 7° (6 days a (Y, 1 and 1 rotations 51 and J on the counter 15)
9 digital (reflection) (during the engine rotation, -C via the number register 16) is sent to the 1st turn state detection circuit 17. Also, the intake DI I' , E.L.
! The output signal 5h41゜b1 1st Δ/1]21 of the engine 8 is converted to a decile value and sent to the operating state detection circuit 17 via one intake negative pressure register. On the output side of this operating state detection circuit 17 (,
L series φl, IJI according to the condition ~) ■Turn the east shift ICl <opening degree) of flow rising 4':, P = 7”
- The bolt 20 is connected and the corresponding j'' - the bolt i 2
From 0 to 0 - Corresponding to the rotational speed and intake f) pressure (
Tsunogo 1) + Ki j! 71 for the request level of Ryuusei 4, Inall
will be issued. 1 On the other hand, the output signal C of lζ position Hinley 〇 which is given to the exhaust)
'A/1. )-:+Manual power is applied to the converter 23. 2nd △ / l) ]] Number 21 ,! I is being output. On the other hand, u, ]! 3Δノ' l) 21
The converter 22 is fully opened from the fully closed switch 13 (ii) when the bow f is manually operated (), and the JJI air recirculation valve 4 is fully opened (ii
'It operates only when the AI state is reached and closes the valve 4.
Detection degree (1
'/I-+ is output and inputted to the second register 25I. Similarly, when the 4Δ/D converter 231J receives a full open signal from the fully closed switch 14, 1) the detected displacement of the position balance 9 that is reached when the 1st air recirculation valve 4 is fully open; Output 2 and convert this to ri'121
Nojista 25) L two-man force. Then, the second Δ/
The detected displacement 1-do(,
LQ'! 1? +ti is input to the positive circuit 26, and only the J and C detected displacements are input to the circuit 26. ili '+J
Displacement l-' -l-1-1? +Ii +I is done. ′
-J, Ta, Stonored by the 117th Jista 2/I/j
Displacement detected when opening and closing 1-1, strike in second register 25) 7
'Ic hearing 11, r detection rate 6γ[-2, 1'1 stored in data memory 27, closed state of reflux valve 4/Jl et al. open state J, total curvature of 1-0 is manually input to the drip circuit 283, and the output Q circuit outputs the output 1':j of the position J1 Donri5) as follows: , +) / l-(1
is issued 9. This correction coefficient 1 ((yo)-ii+: 1st
Complement 1 ■ 2-change A1'/, l 'd' (, 2nd complement j[
circuit 25) and converts the first displacement 1' into the second one.
The correction displacement 1''-l'/k is supplemented by j1tI. Then, this second correction displacement I'l l-'' and the required displacement 1-map output from the notator memory 20 are /△Converter 30. Comparison times l through 31!
It will be man-powered at 1332. This 1. The L comparison circuit 32 operates when the required degree 1 11111i11+ is large, and the first comparator 33 operates when the correction displacement 1'' or the required degree fI'71 map J: is large. Zuru 2nd
The operation of the first comparator ζ33 is 11.
'1, the first control signal (Q d) is outputted to the first solenoid E5a of the electromagnetic control valve 5 via the first drive circuit 3355, and the second comparator 3/I is activated. At the same time, a second control signal O is outputted to the fourth constraint solenoid 51 via the second drive circuit 36. 11
・Explanation of Figure 1-1 of Figure-1- and Figure 5 using Shokusho [) (
). Control circuit 6I, 1, engine rotation speed 7BJ, intake negative J, tI? The operating condition is detected by JJ based on the signal a and 1) manually input from the engine ε3, and the operating condition (
li: Demand degree of Kankiun Ryuushō 4 corresponding to S・j (1'/(
Opening degree) l Mal+ data measurement 20 to B sale, J, l Gobosichen l signal from lens 9 (Ni J
: TS-CI-δiL' JJf Detect the displacement of the air recirculation valve 4 (Suit part SI in Fig. 4. S2.S3). In this case, there is a sudden change in the position (;
11-, a Detection level i1'l (output (
11a) 1 no υ [Shi! 1 corresponds to the reference characteristic as shown by the solid line in Fig. 5.)Ij, that is, always l -l-ac
t is 11.1, and the detection degree is CL. Second correction circuit 26, 29 ('?lIi 1[sa4I
(1-1-' = 1''), the comparison circuit 32 is manually inputted to l- to the self-tolerance I1n1mall.If lnHj > 1-, then 1st control Shinkari (1 or il+'l til1 circuit 6 to electric+a control I
It 5's first solenoid 5a (-L output causes 4Jl)! Popularity 4 () Month 4/I +14
J, the control negative pressure supplied is increased 4, and the opening of the valve 4 is increased so that the detection chamber ()n l becomes equal to the syn severity 4I't l-map, J,'r, the opening degree of the valve 4 is increased, J, +nap<
In the case of 1, the second control signal e is output to the second solenoid 51 (the first control signal is set to low 1), so that the detected displacement 1 becomes equal to the requested displacement 1.11i111. In this case, the detection degree I'lI- and the sudden change (i'/l act
Since there is C, the above control has a large addition 1...a c + is the required degree (I'll-1na1.
l will be matched. However, as shown by the dotted line in FIG. 5, the detection chamber 1fll- outputted from the base tj (ii, if there is an error with respect to the positional adjustment 11-, the position adjustment 9) is
does not correctly indicate the actual displacement 1act, so the detected displacement 1- is controlled as described above to obtain C Tokyo displacement 1., .
Even if it matches In if p, the actual displacement 1-all will have a value of 52, such as the hourglass-shaped displacement 1-n1all. In this case, 'tri' of the control circuit (3 is position sensor 1)-9
(!l is the same as i1! I Q': It corresponds to the r nature. 1! It operates as follows. , from full open switch 13 (i'ffi ”5
Depending on f) 3Δ/1 converter 22 operates 11, and the detection chamber of position sensor 9 (i'/
, 1. 11)) The detected displacement l-+ is stored in the second register 25l (steps S7I, Ss),
Also, 1 no 1 ki) Y style bu? When 'I is fully open, the 7th '
By activating the lA/[)l] converter, the detected displacement of position 9 at that position is changed to the detected displacement 1 when fully open.
-2 to the second register 25 (step S 6 , Sy), and then the first supplementary mouth turn v82
By G, the detection degree A)'11- is corrected to 1st correction change A◇L'-=111 using the mouth open and fully closed 111 detection change correction coefficient k
= (+, -2-1,, +) / l-, (using l (in the second correction circuit 29, the above-mentioned first ?ili' [displacement 1' is converted to the second correction displacement L''' = 1-' / complement i1 to k
:'! Jru (Suits/S8.S9). These corrections are made as shown by the dotted line C in FIG. , the solid line C shows 1 base'! ``M-sexuality''; match cs ii?, + 617) '(゛a uril 7)
: U li, L ″ = (1−−−L+ ) L, o/
(12-l-+) (dli h eyes, e.g. L
When = l-+ (fully closed), it becomes 1--0, 51, and when L = 1-2 (distance +1; '+), l''
= 10 and Natsu (, the second auxiliary displacement 1-'' is the actual displacement Lac
4 to reach l. Like this←? +Q i[displacement 1- C,L
, the required displacement 1-mall, etc. are compared in the same way as in case 1-, and the snoop S to -8l: (according to l--=
1. However, since the corrected displacement 1-11 correctly indicates the actual displacement 1-ac[, the exhaust recirculation valve 4 is controlled as L = I-map. The opening degree is set to >12 depending on the operating condition 11;j
I like being with Maro and Shichi. In addition, in this embodiment C"! J exhaust] ψ flow j,
-J, but closed +1'' and S: l1i
Only for l lRi, let the 2' real displacements of fj be the first
．． Detected as the second set displacement (), the detected displacement of the position sensor 9 at this time may be corrected as 1-1.1-2. 111
It is desirable to have a +1 value for the viscosity direction. In addition, in this embodiment, the exhaust 'JW flow valve flow elevation valve body 7'Id
The odd 0 is the first. When the second set displacement is reached, the full-open switch 13 and the switch 171 are directly detected.
ii' indirectly by detecting the extent to which the exhaust velocity flow valve t4 outputs a predetermined required displacement of each of the exhaust velocity flow buttons t4. In addition, the 1 control toe 11 path 61 shown in FIG.
It is constructed using a combi coater. (Effect of light) Like 1zu 10, wood light (accordingly, the engine's 1 no 1 air) flow control device F+' or idle control device (13
, Detects displacement of IJ1 air reflux valve flow rise J throttle valve (]
It is difficult to detect the fluctuations f and fl which are noisy due to noise (due to 1 error, l?
Even if the platform has an error with respect to the predetermined reference characteristics, the output characteristics of the detection means will be automatically corrected for both the zero point and the slope1. Flow control or i;t Fiddle control will be performed with high precision (i; 3).

[Brief explanation of the drawing]

Figure 1 shows the physical structure of the present invention (J 7' I-1 ivy diagram, Figures 1 to 5), and Figure 12 shows the embodiment of the present invention. Control circuit 11 system j lx diagram, Figure 33 is a small diagram showing the configuration of the control circuit, Figure 1 is a diagram showing the operation of the control circuit. Figure 5 is a graph for explaining the operation of A'1.
Displacement detection means (9... position) C... Operating state detection means (7...) Carrot rotation speed range, ε3
...Intake f! +-iL! (17...operating state detection circuit) 1)...:I storage means (20...data reading)
1,... Displacement detection means (32... Comparison circuit) 1 ・
・Displacement control 11 means (5)...Solenoid control valve) 0...First setting displacement detection'T 1st stage (13...Close switch) 1
-1... Second setting displacement detection F1 closed (1/l... Fully open switch) I... First storage means (2/l... Second register) J... Second storage means ( 2... 2nd register) K... Complementary 1 ■ - D stage (26... Ri'11 supplementary circuit,
29...2nd road 1l-13J1> 1 applicant Toyo Gogyo Co., Ltd. 1 3

Claims (1)

[Claims] (1) Main displacement detection means for detecting displacement of control members such as the control parts Δ that govern the operating state of the engine;
an operating state detection means for detecting the operating state of the engine; a main memory means for pre-memorizing the required displacement of the control unit H according to the operating state;
：Displacement difference calculation means for overcoming the difference between the calculated displacement and the detected displacement output from the displacement detection means, and receiving the output of the calculation means ()C The displacement difference is made zero. In an engine control device that controls a displacement control means for controlling the control unit, the displacement of the control member is set to the first. A first setting displacement detection lower stage and a second setting displacement detection means detect the second setting displacement, respectively, and these detection means detect the second setting displacement. a first storage means and a second storage means respectively storing the detected displacement output from the main displacement detection means when the second set displacement is detected; 1. An open-head mounting for an engine, characterized in that it is provided with a correction means for correcting and overwriting the detected displacement output from the main displacement detection means based on the stored value of the second storage means.