JPS5816980A - Automatic load control method of thrust engine with variable-pitch propeller mounted thereon - Google Patents

Abstract

PURPOSE:To minimize fuel consumption by detecting engine revolution speed N and controlling a propeller pitch to make a result from an expression K1NM+K2 (K1, K2 and M are constants) agree with a fuel injection pump rack gauge R on the basis of a boat speed indicated. CONSTITUTION:After converted in the form of a dc voltage by an input amplifier P12, a revolution speed N of an engine or a propeller is sent through an isolation amplifier A13 and a control start minimum speed setting circuit 4 successively to an arithmetic circuit 5 wherein the value N is thrown into an expression K1NM+K2 for calculation and the result is thereafter inputted into a comparison circuit 8. A voltage which corresponds to a location R of an engine fuel injection pump rack is on the other hand inputted into the comparison circuit 8 via an isolation amplifier A27. The output from the comparison circuit 8 is applied via a dead zone regulation circuit 9 and a time relay circuit 10 to a propeller pitch controller 13 for varying the propeller pitch, thereby offering a speed control instruction VS.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic load control device for a 41-speed engine with an 0T variable pitch propeller for a ship.

Generally, in a propulsion diesel engine with a variable pitch flover, the engine load can be controlled not only by controlling the main engine rotational speed (11+lI) but also by controlling the propeller pitch. In most cases, these are controlled separately. Therefore, −? It is extremely difficult to operate an engine with the minimum fuel consumption of 1 kg for a ship speed of Energy-saving operation is not possible.

In addition, as an automatic load control device a for the purpose of energy saving,
・There are systems that control fuel consumption/output to a minimum, but these do not take propeller efficiency into account, so they have little energy-saving effect.

However, there is a method that sets the distance that minimizes fuel consumption for the ship's speed at some θ island, and controls between these several set points on a straight line connecting the set points. In this case, if the number of sets is small, the energy saving effect will be small, and if the number of sets is large, it will become complicated. ,! It's hard to adjust.

Based on the above background, these five principles were created by VC and business companies.
For propulsion with variable pitch propeller 4;
An object of the present invention is to obtain an automatic load control method that can always make the main engine perform four-wheel rotation with the minimum fuel consumption of 1-1 for the desired speeds of ', ++, and i, and that can obtain a good energy-saving effect. There are a lot of things.

1. The principle of this invention will be explained.

Figure 7 shows the equal fuel consumption rate curve of the main engine (curve (a)), Figure 2 shows the equal fuel injection bomb rack scale curve of the main engine (curve (b)) (abbreviated as equal rack curve), /1 is 1
Variable pitch propeller ship (abbreviated as C1J ship)
The curve (C) is a broad pitch curve, and the curve (B) is a straight line.
is a constant speed curve. Oh, in Valley 1, each person-
The number is: i) s , 1111 output p8N ・
... Engine rotational speed 1 current r p 111be ... Fuel consumption rate g / p s - h rθ ... Propeller pitch degree V 8 ... Ship: +il' I (tR ... Fuel 1 The curved jet cylinder 7" rack scale mil+ is shown, and all are expressed by the head relative to the rated time (hey). In each case, the curve (e) is a constant 1h propeller pitch θ = 100
The propeller characteristic curve when . In addition, in Fig. 3, the curve (g) indicates the surging line that indicates the engine's supercharger surging generation limit. Indicates the possible region -C0 If each curve in each figure is expressed as a function, it will be as follows.One curve (a) Ps=fl (N, be)-(
1) 1st line (b) Pa=f 1 (N,
11) ... (2) Curve (c)
Ps = f, (N, θ) ... (3) curve) Ps = f4 (N, Vs) - (4) curve If the relationship between the rotational speed N and the rack scale R is determined and drawn for the curve 1b2, a constant ship speed curve such as the curve (E) in FIG. 5 can be obtained. To further explain this relationship, this constant ship speed curve (E) is expressed as R=f, -' (N, Pa) -ft-' ( N, , f4(N, Va) j=f
(N, Vs) The relationship is derived from θ1t1. Depends on the situation.

It's a trench, the fuel consumption is Q g / lc t - h r
= g /m1ce, then Q=be If we find and draw the relationship between rotational speed N7 fuel consumption and Q, we will not be able to obtain a constant ship speed curve like the curve (I) in Figure 1. To provide a supplementary explanation of this relationship, this constant ship speed curve (S) is calculated by Mil's equations (1), (4), and (5) as follows: Q=jl −' (Nm Ps) XPs/Vs -f
, -'(NL f, (N, Vs))Xf,
(N, Vs)/Vs-g (N, Vs)...
(6) It depends on whether there are 4 people in line 1 or 4. Then, if you go to the VC on the constant speed curve (su) of the Ug diagram and connect the points where fuel consumption - MtQ is the minimum, you will find the small fuel consumption 111 curve (nu) at 71 in the Ug diagram. .And, by transferring this minimum fuel/1!i cost curve 1) min;i:<s to the diagram, the minimum fuel consumption 41 curve OL1 in the relationship of rotational speed 1 stop N - rack scale R can be obtained. .

This minimum fuel consumption i4 curve Q1. ) is approximated by the following equation.

R=Igu, N+i<g, ... (
7) However, Xtz main engine fuel injection bomb black Mimori N: Main engine rotational speed M: A4 fuel of the main engine) A constant that can be determined by the self-expense rate curve and C) of the CPP travel curve (1: The rotational speed of the main engine and a constant determined by the fuel injection pump (2: a constant determined by the main engine fuel injection pump) In the present invention, the minimum fuel consumption curve (1) on the minimum fuel consumption in FIG. Main engine operation and propeller pitch control are carried out on the
Upper Qf constants M, K+, I (t is determined by experimental data.

In Figure 5, curve (3) is the surging line that shows the limit at which surging occurs when the main engine Jb feeder crashes. Point A is the rated output point, point A, point B (r^(+'7 +5
'Direct+13i1 A B is the fuel injection bomb rack upper limit stopper line to prevent one load. and,
The intersection point C between the constant fuel injection f+4' curve QO and the fuel injection bomb rack upper limit stopper line AB does not necessarily coincide with the rated output point A, so if there is a At @, there is a rotating section and a CL'P blade HI.
4 and the system that can be controlled individually directly.
°4 If you can do it (8).

Next, I:IIl!Il of the present invention using the principle of above-1()
The load control method will be explained based on the IMh block diagram shown in FIG.

Automatic load control (1111Explain the circuit ↑jIll configuration in box 1- Then, 2 is the main engine or propeller rotational speed N 7.I Pressure is the number? Receive tti constant direct jti '+H1: Pressure [
The time constant of the input amplifier for C conversion is set to 5 seconds. 3
is the 1g noise from input amplifier 2) 11? Isolation amplifier, 4 (1st Φ11 negative control, 1 work) to prevent malfunction and damage of the arithmetic circuit 5, which will be described later.
11# At the start,) ib control operation I to set low rotation speed I
uh Start 1 In the low I output setting circuit, the main engine I (it is also possible to operate at low continuous rotations).

5, rotation:':M, b4', input NuC pair (7te l
(lNM 10, 'fr: yt-t゛ro'1.)i
l!゛! l It! Old ``ζ'', Heno IH: k of l-μ
・jλ[11 (can be set continuously variable). C: is the fuel injection bomb rack 1γ [, I: measurement', the potentiometer for the set, JJr 1 ((pressure, input, and conversion with the input amplifier, 11, ~ constant in the range of 0 to 5 seconds) 4).7 is the noise of No. 1d from the input amplifier 6?
+ii, I+Production and damage prevention +I) Isolation amplifier, 8 is the output of the rIIi arithmetic circuit 5.
+L and 1゜Form 1: 1 plate R
Comparing the output with human power, the difference in output (+- generated error comparison circuit, 9 is the difference between
& band)・General 1r1 Time 1 rule (person・(・1j
The power output can be adjusted within the lpj opening of /~r% using the generation, dead zone, and secondary one-stone circuits. , 10 is the tie A 11 l, z-, which is connected to the input No. 16 r made by a relay that makes one song and the load (variable pitch propeller pitch) fi + l J j j LII made U.11 hours adjusted timer.
The ON and 01+゛F times of the timer are each set to 0.
It is adjustable within the range of 1 to 70 seconds. Also, 11
12 is the rotation speed IIJ indicator, and 12 is the rack position indicator 41.

Next fli! I (Explain the wholesalellll1 work.

Speed 1u "control or 11 command is carried out by hand yB, vrxn% r
') Main engine rotation corresponding to desired ship speed VfiK - I! (1) degree is commanded (a), the N rotation speed N of the propeller is detected by the tough generator, and is inputted to the input amplifier 2 as the voltage No. 1A as described above. On the other hand, the main engine fuel injection pump rack position iM R is detected by the voltometer and is manually inputted to the input amplifier 6 as % '1i (pressure 1).
``10 I (, (direct) and H's A: 1 are compared, and when the difference output exceeds the range of the non-contact band, a time relay driving output is generated to create a time relay circuit 10. and the propeller pitch control device 1:1' for the installed time,
13, automatic load control No. 4g is issued, and the propeller pitch change operation is performed for the set time. In this case, R is 1
(In the figure, if the minimum fuel injection amount curve Q is higher than the
) speed V8. [On the other hand, 1) When operating at point T', the propeller pitch can be reduced, and when R is 1 (less than 1N"), the region below the curve QO, (PL is when operating at point E) increase by the propeller pitch a) r
, then, for example, 1) when turning 3jij at the point, pro ″−ζ
If the speed is reduced, the speed will move to point D' in Figure 6, and the ship's speed will decrease, but when operating at a fixed ton, the main engine rotational speed IWN should be increased. + for speed 1j
[If the control 011 command is executed, the CPP buy angle μl movement will be followed,
The operating conditions at point F, i.e., i(, N×I(, and 16) are
Since the J control is always performed, it ends up being one song on the minimum fuel consumption.
Main engine operation and propeller pitch control at points on DI61
11 will be performed. Also, if the propeller pitch is increased during operation at point E, the shift will shift to point E' in that one move.
If combined with hand 1111 ft1ll nlu, it will be controlled in the same way to operate at point F1, and the main engine operation and propeller will be controlled under the condition of minimum fuel consumption ht at that ship speed with respect to the commanded speed Vsl VC. Pitch control is 71 in.

As explained above, according to the automatic load control δ11 method of the present invention, the main engine rotational speed i and the current N are detected and K, N''
1) The propeller pinch kf is controlled so that the fuel 1 IC゛↓ bomb black scale R matches the value of this equation 1), so the minimum value for any commanded ship speed is The main engine can be operated with a total of fuel i + '4 cost -, and an energy effect of j(j) can be obtained.

Sol~te, R-K I N 1K * 1 in Zuru Hakunaka ↓
Since the d-transfer is possible, as is clear from Fig. 5, the surging line does not operate, and the supercharger surging light protection IL is simultaneously implemented, and rapid reverse movement is possible. At the same time, it is designed to prevent the main engine from overspeeding during dry harvesting, and it is also designed to prevent the main engine from overloading when shellfish and sea glands accumulate on the hull of the ship. % rJM and other excellent effects.

[Brief explanation of drawings]

Figure 7 is the 8+ consumption rate curve for the main engine, Figure 1 is the scale curve for the main engine's tampering sensitive material 1, and Figure 3 is the cruising curve for a variable pitch propeller ship. 1. Minimum fuel consumption of variable pitch propeller ship 14th IJ1% period, 5
'l\memaΔ×zuki January 1 river 11 'i'l 1ii
The speed of the ship and the speed of the ship at the temple of the main gate, which immediately escapes from the ship
(Small fuel consumption 11 curves; J Figure 6 shows only a part of Figure 5, Figure 7 is uneven 6 light) Figure 11 Load control work 1 + #butcock diagram .l... Control self+1+#\Ir11'111
1-411.5... Performance 1F circuit, 8...
Ratio II circuit, 9... Dead zone I-11 adjustment circuit,
1o・Song・Tie l, Relay, 13・・Song propeller pitch control device i'+t h (A)...Smoky inertia consumption rate 111th "Hi, (B)... etc.→Tsuku bend, (c)...Inn/propeller pitch curve, ni), (
E), (11)・Song・Constant speed curve, (×),QO・・
...Minimum fuel consumption curve. Applicant Niigata Iron Works Co., Ltd.
) Missing figure □ N (%n)

Claims (1)

[Claims] Detect the rotational speed N of the main engine, input the signal of this rotational speed N to an arithmetic circuit, and calculate KINM1* (where K1., M is a constant, and Input the calculated value No. 1 and the signal of the main engine fuel injection pump rack height R into a comparison circuit, and compare the calculated value, N+, and the value of the main engine fuel injection pump rack scale R. , in this comparison, if R is greater than NM+, reduce the propeller pitch, and R is greater than KIN+.
To! An automatic load control method in a propulsion engine with a variable pitch propeller, in which the main engine is operated under conditions where the main engine fuel injection bomb rack scale R always matches the main engine fuel injection bomb rack scale R by controlling the propeller pitch pipe to increase when the propeller pitch pipe becomes smaller.