JPS59194045A - Injection timing controller - Google Patents

Abstract

PURPOSE:To secure accurate, desired injection timing at all times despite a change in battery voltage, by compensating the pulse duty ratio of a control signal for injection timing control being calculated in accordance with driving conditions in an engine on the basis of the battery voltage. CONSTITUTION:In time of engine driving, first a fundamental duty ratio of a control signal corresponding to the desired injection timing stored inside a ROM (read-only memory) 21 on the basis of outputs of an engine speed sensor 1 and an accelerator sensor 5 at a control circuit 30. Next, this fundamental duty ratio is compensated according to a compensation quantity found out of outputs of a suction pressure sensor 3, a water temperature sensor 7, etc., while the said compensated duty ratio is further compensated on the basis of the compensation quantity found out according to the voltage of a battery 13. Then, the control signal of the final duty ratio being obtined like this is transmitted to a driving circuit 27 from a central processing unit (CPU) 19 whereby valve opening timing in a solenoid valve 29 related to an injection timing control device is controlled.

Description

[Detailed description of the invention]

The present invention relates to an injection timing control device for a diesel engine fuel copper device. Conventionally, as an injection timing control device for a diesel engine, engine speed, fuel injection rating, cold water temperature, etc. The operating condition detector detects the operating conditions such as, and calculates the target injection u; A control device that performs loop control has been proposed.However, in this type of device, the calculated target injection timing data is converted to the pulse Durer ratio of the control pulse signal for control, so the battery voltage If this changes, the 1li'ir control of the electromagnetic acticoator, which serves as the 1st timing flD means, will no longer be able to be accurately controlled according to the target injection timing data, and this will cause engine output, fuel consumption, and JJI There has been a problem of deterioration of performance such as gas components or noise.Therefore, the present invention has been developed to change the pulse debug ratio of the control signal corresponding to the target injection timing calculated according to the operating conditions based on the battery voltage. Supplementary i) In order to reduce the influence of fluctuations in the battery electric lamp that serves as the power source, a, 1 injection vil 1 control is not required. The purpose of the present invention is to provide a timing control device.For this purpose, the present invention has the following features as shown in the basic configuration diagram of FIG.
The operating condition 1'1 detector J1, which electrically detects the operating conditions of the engine, uses this operating condition 1'1 data)1 (corresponding to the target fuel injection CFI 11.% +I11). This timer position is determined by calculating the pulse decoty ratio of ill+butsu and this pulse y' J, -j-i ratio to battery voltage e, J:t, correction 1J8 moejin means, calculation. Means 1 + h + + filtration output 2) is amplified through the drive circuit C and the fuel λ'411lr5 river pump injection 1.51! Adjust IJ 11f for 1
f Bright adjustment stage (1111"I and IiA J 戊shilko). Hereinafter, the embodiments of the present invention will be explained based on the drawings. Fig. 2 is an overall configuration diagram of the present embodiment, The operating condition (4 detectors are rotation speed sensor 4), intake pressure sensor 3, accelerator temperature sensor 5, water temperature sensor 7, intake temperature sensor υ9, combustion) temperature sensor 11, The detected data is taken into an electric control circuit 30 as a control means and used as a control parameter for the target injection timing jiji C'. The data is taken in as a control parameter, the pulse decoty ratio is calculated for the control signal corresponding to the target injection timing of the engine, and the pulse decoty ratio is further corrected according to the battery voltage 13. 27 is a CPU This is a drive circuit that current amplifies the control signal output from 19, and performs switching (J) as shown in Figure 3.
Connect the control signal input side to the base of the transistor through a resistor, and connect it to the excitation coil of the electromagnetic filter 29, which controls the injection timing to the receiver circuit. J3, the other end of the coil is connected to the battery 13 or detects the voltage of the battery 13 and inputs it to the CPU 19 as a digital paste! At this time, a battery voltage detection circuit is connected to the A/D converter 25. Figure 4 shows the main parts of the Potsunko V type distribution combustion 1 injection pump [
111 is shown, where ζ゛ is the injection timing control means of the VE type distributor 6+l ponzo, and the hydraulic pressure acting on the hydraulic timer is bypassed by the solenoid valve 21 and the timer screws 1 to 39 are operated. The device is adopted. Zuii Wara, 31 (
The housing of the injection pump, 33, is a low sill ring, which faces the J iscam (not shown) and supports the []-RA G35 through the shirt 1~. . The roller 35 is in contact with the engine crankshaft as shown in the diagram, and is engaged with the engine crankshaft. When rotational motion is applied, the knife is tightly attached to the roller 35j)2
The rotation 31F movement and 11 return movement occur, and the combustion
31 pressure distribution is performed. 37 is a hydraulic shilling, and 1.
1 through 1] - 3-I to 33 shillings! The position of the tie 7 piston 1-39 is the oil L1 of the hydraulic cylinder 37. A solenoid valve 29 is provided in this bypass path 45 which returns the oil pressure to the fuel tank 1 side.
The fuel pressure inside the pump/19) is introduced into the pressurizing cylinder 37 through the A-refrigerator provided at 9. 51 is a vane-type fuel pump (31 feed pump), and the fuel in the fuel tank is supplied to the irradiation pump by this pump. To prevent excessive rise. Figure 5 shows the cross section of two solenoid valves, 57 is a data core, 59 is a lupin core, and 61 is an Ic inserted between them.
The compression coil is a coil, and 63 is an excitation coil. When the excitation coil 63 is energized, the 11-pin core 59 moves in the direction of compressing the coil spring G1 by j1, that is, in the right direction in the figure, and listens to the valve 44V65 at its tip to flow fuel into the bypass path 45. zu. Therefore, as the pulse decoder fi'-(ratio of the current flowing through the excitation coil 63 increases, the time for which the valve body 65 is open increases, the pressure inside the hydraulic cylinder 37 decreases, and the return force of the coil spring 43 causes the timer screws 1 to 1 to Move the ring 39 to the right in the figure, and move the roller ring 33 in the counterclockwise direction.
Move rl1! r! 04 timing is controlled to the retarded side. Conversely, the pulse current supplied to the solenoid valve 29 is
When the tee ratio is small, the solenoid valve 29 operates in the direction of closing the bypass passage 45, reducing the oil bypass.
The oil pressure of the hydraulic cylinder 37 increases, and the timer screw 1hen 3
9 moves C which hits the coil spring 43 to the side, thereby rotating the roller ring 33 clockwise and injecting n;
) I! lJ is controlled to the advance side. Therefore, the advance angle amount is determined by the pulse a'1-eye ratio of the drive signal of the electromagnetic valve ↑29, as shown in FIG. -The movement of the ring 30 is
As shown in FIG.
2π1° range °C advance angle (retard adjustment is possible,
This angle is calculated based on the amount of advance angle required by Diegel Isoseki, the difference in pump installation (t), the wear of parts (J), etc. over time, as shown in Figure 8. As shown in Figure 2, the L of the Narukawa timing control/lI equipment is
The control circuit 30 includes a CPU (medium heat processing unit 1 to) 19 serving as a calculation means, a ROM (read-only memory) 21 in which program data and various map data are written, and a RAM.
(Random access is recommended) 23. Waveform shaping circuit 1 that shapes the input rotational speed signal into a rectangular pulse signal
7. Operating conditions) Convert analog detection signals sent from other various sensors of the 41 detector into digital signals! i! I
The control signal 23 is provided with an A/D converter 25, and a driver circuit 27 that amplifies the current of the control signal 23 and supplies it to the solenoid valve 29. Then, based on the operating conditions detected from various ranges, the pulse decorty ratio of the control unit is calculated to determine the timer position corresponding to the target fuel level, and this is applied to the fluctuation voltage. : After correction, the current amplified drive output is sent to the solenoid valve 29. In the operating condition detector, the rotation speed sensor 1 is, for example,
An electromagnetic pickup is installed facing the toothed Φ-shaped inductor connected to the engine's crankshaft (1η), and the intake pressure sensor 3 detects the negative pressure in the in-arc manifold of the engine. Accordingly, the accelerator temperature sensor 5 is configured with a detector that detects the accelerator pedal's ``111'' amount on a water outlet meter. The intake air temperature sensor-9 is connected to the Reamister-type C quality detector that detects the air temperature.
]--Mr. style iiM 1. r<detector J: ri,
In addition, it can be configured as a Leemistor-type sensor that detects the humidity of the fuel λ'81 inside the fuel injection pump or the like. Next, the operation of the υ injection q1 timing control device will be explained with reference to the graphs 71]-もI-1~ of FIG. 9 and FIG. 10. First, the CPU 19 executes processing according to a program stored in advance in the RO'M21, but the RON421
In I; 11, the rotation speed N required for the operation process is 1. ↓ Data map of the wood decoty ratio, take the cooling water temperature - IW as the parameter, water ifM? Data map of iti stop l'11 dW, intake temperature correction 1 dA using intake i crystal 1-Δ as a parameter
A data map of the intake pressure correction amount dP, which takes the intake pressure P as a parameter, and a data map of the battery voltage correction amount dVB, which takes the fluctuation voltage VB as a parameter, are stored in advance. First, when the key switch of the engine is turned on, the operation is turned on and off, and in step 101, the registers of the CPU 19, the RAM 23, and the input/output capo 1 are returned to their initial states. Next, step 102 is executed, and the interrupt routine -
64jV is taken in, and in step 103 the accelerator speed is changed from 4)5 to the A/D converter 25.
Data on the accelerator distance α is acquired from the detection signal sent via the . Furthermore, in the same way, the water temperature arc TW from the water temperature sensor 7 is obtained in step 104, the intake pressure data P from the intake pressure sensor 3 is obtained in step 105, and the intake pressure data P from the intake pressure sensor 3 is obtained in step 10.
At 6

[Intake temperature sensor → Take in intake temperature data TA from No. 9 via the A/D converter 25. Next, step 107 is executed, and steps 102 and 1.
In 03, the rotation speed N IE and the axle height α
This data was stored in the ROM 21 as a parameter (-1 mark Funegawa 11 Valley! Control 11 corresponding to I11: Search for this decoding u-['ll O from the map data of the pulse deco-tee ratio of the bow. .Similarly, step 1
In 08, the water temperature 1-W1, which was circulated in steps 104, 105, and 106, and the intake product "△" were 7 each.
' - from the map data in flOM21 using - evening as a parameter.
Search for (11). Next, execute step 109 and step 107-
Q Subj 108 to the calculated basic duty ratio Do.
The correction amount d W , (1△, (I P ) extracted in step 1 is added, and the basic duplex ratio Do is corrected by the water temperature, intake pressure, and intake air temperature. Next, in step 110, the buffer is Take in the electric power IE V port through the Δ7・'D converter 25, and step 111
Add the battery voltage VB as a parameter! is
d V B (1) From the node map, calculate the correction 1'i% (IVB) as shown in FIG. Roughly add this correction Lid\/B to D1?
+Ii Tl, the final due-eye ratio D2 of the control signal for controlling the timer position corresponding to the target injection timing
is calculated. In step 113, this Ayudhi ratio D
2 is sent to the output capacitors 1 to 1 in the CPU 19, from which the control fB of the pulse duty ratio D2 is output to the drive circuit 27, and the drive output current amplified by the drive circuit 27 is sent to the solenoid valve 29. The valve is controlled to open when the solenoid valve ↑290 is heard. And the above Sude Tsubu '102-113
is executed repeatedly 3, here? The valve opening time of urMti29 is controlled to be longer.1. :, the oil pressure in the bending ring 37 of the hydraulic timer drops, the timer screws 1 to 39 move to the right, the °C roller ring 33 is rotated in the bending i1 direction, and the fuel injection button 11i is retarded. Controlled to the side. In addition, when the solenoid valve 29 is controlled so that the distance between the 111 valve and the valve 111 becomes known, the i[1IIT in the hydraulic cylinder 37 becomes "-8", the timer piston 39 moves to the left, and the roller ring 33 rotates in the il+ direction, and fuel is injected! 111 is controlled to the advance side. In this way, the above-mentioned startup 110 increases the battery voltage VB
Detect this battery voltage V [Calculate 3cr = correction amount by arc + IVF3] 1], this correction tii d\
Since the due-eye ratio D1 is corrected using /B,
As shown in FIG. 10, the duplex ratio of the control signal C]-
Even if the voltage is constant, if the battery voltage drops from the standard 71 lvl, the electromagnetic 'J'
T's encouragement Tri? Since the H flow ■ changes in the same way, the quantity valve 11 of the lπ solenoid valve. '1 changes to T1 or 12, but in order to correct the error in the valve opening time due to the fluctuation of the voltage, the target injection n,' according to the operating condition 1'1 is r +11] can be -jH present 1J. In addition, as the driving condition 1'1 for one person, the rotation speed and fuel number 31
It is also possible to use the 4-way suspension of the Fukawa pump. If the control rack (i.
A position detector such as a meter can be used. As explained above, the jet 0'J tRj il of the present invention
l'J control device (JJ, if η
The pulse decoupling ratio of the control signal for timing control is determined by the battery lightning 1 that serves as the power source for the injection timing adjustment means.
Since the configuration is configured to correct f by J, even if the battery voltage fluctuates, the target 11C according to the operating conditions
) Accurately controlling the timing of failure can ensure good performance in terms of engine output, fuel efficiency, exhaust gas components, etc.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram of the present invention, FIGS. 2 to 11 are examples of the present invention, FIG. 2 is an overall configuration diagram, and FIG. 3 is a connection diagram around the drive circuit. Figure 7 and Figure 7 are a diagram of one main part of a distribution type fuel injection pump, Figure 5 is a sectional view of a solenoid valve, Figure 6 is a graph of the pulse-day ratio and advance angle, and Figure 8 is LJ. Graph of engine speed and advance angle,
Figure 9 shows fuel oil 1-1 No. 10 showing injection timing control.
The figure shows the waveform diagram and timing diagram of the excitation current of the solenoid valves such as iH and C according to the valve status.
It is a graph of the voltage and the amount of correction. a... Operating condition detector, b... Actual means, C...
Drive circuit, d...Injection timing adjustment means, e...Batch lid...Revolution speed sensor, 3...Intake pressure sensor, 5...
・Acrelma Doshinsa, 7...Water 611? Nza, 9.
・・Intake temperature sensor-111・・4 combustion engine 1 item
113...rose. Agent: Patent attorney Tsutomu Setatetsu and 1 person Figure 10 VB Hatsuchi 1'No' Office

Claims (1)

[Claims] 1. An operating condition detector that electrically detects the operating conditions of the engine, and a timer position for determining the position of a timer corresponding to the target fuel level based on the operating condition data. Control n++
<tq''; Injection of fuel copper pump +1 yen
! J-injection 11.J-injection 11. 'i I! rJ control device. 2 The engine speed and accelerator spacing were used as the operating conditions! l: ij jll crystallization range The injection timing control device according to item 1. 3. The above operating provisions! -1, the injection timing control device according to claim 1 using cold 7.11 water, intake air density, and combustion temperature.4 ii. The injection timing control device according to claim 1, which uses the rotational speed and the fuel noise of the fuel injection pump.