JPS6170136A - Controller of supercharger - Google Patents

Abstract

PURPOSE:To provide satisfactory combustion free from both generation of black smoke and increase in fuel consumption by governing turbine nozzle area variable mechanisms of a plurality of superchargers by way of one adjuster at the same time so as to putting of the superchargers in the same operating condition. CONSTITUTION:A blade angle setter 101 generates a set value psiT is sent to a blade angle adjuster 17 and the adjuster 17 adjusts a variable area nozzle 5. An actual blade angle psiT' is detected by a blade angle detector 16 and a blade angle comparator 103 then generates a compensatory quantity DELTApsiT on the basis of an error between psiT'and psiT. The blade angle adjuster 17 compensates the set value psiT by DELTApsiT and generates the resultant value psiT''.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a supercharger control device for an internal combustion engine having a plurality of superchargers.

[Conventional technology]

As shown in Fig. 2, the exhaust gas combusted in the cylinder 1 enters the static pressure pipe 3 via the exhaust branch pipe 2, passes through the exhaust pipe 4, generates power in the turbine 6, and is discharged to the outside from the exhaust pipe 7. Ru. The turbine 6 drives a compressor 12 via a shaft 8, and the compressor 12 takes in atmospheric air from an intake port 11, compresses it, and passes it through a scavenging pipe 13 and a scavenging trunk 14. Air necessary for one engine is supplied to the cylinder 1 via a scavenging branch pipe 15.

A nozzle 5 is provided at the inlet of the turbine blade in order to effectively convert exhaust gas energy into power by the turbine 6, and when the load of the nozzle 5 is low and the exhaust gas energy is reduced,
It has an adjustment mechanism so that the appropriate nozzle area can be set, and this is done by the handle 52 via the link 51!
It is produced 7 times.

[Problem that the invention seeks to solve]

Normally, as the number of cylinders increases, multiple turbochargers 9 are installed, and when electronically controlling the nozzle area of these multiple turbochargers, each is influenced by the other turbocharger and cannot be delivered to the set value. It fluctuates without changing.

It becomes unstable, especially in transient conditions, and combustion worsens due to lack of air volume, producing black smoke and increasing fuel consumption.

It is an object of the present invention to provide a control device for a supercharger that can eliminate the above-mentioned drawbacks in a controlled device having a variable mechanism.

Means for Solving Problem C] The present invention is characterized in that in an internal combustion engine having a plurality of superchargers, a nozzle blade angle detector for detecting the blade angle of a turbine nozzle is set to correspond to the engine load. A nozzle blade angle setting device that outputs a value, a nozzle blade angle comparator that compares the detected blade angle with the set value and outputs a correction amount for the same setting value, and a nozzle blade angle comparator that outputs a correction amount for the same setting value. A nozzle blade angle adjuster is provided to output the set value and adjust the blade angle of the turbine nozzle.

In addition to the above device, there is also an inducer blade angle detector that detects the blade angle of the compressor and the inducer, and an inducer blade angle detector that is installed in parallel with the nozzle blade angle setting device and outputs a set value corresponding to the nozzle blade angle. a setting device, an inducer blade angle comparator that compares the detected blade angle with the set value and outputs a correction amount for the same set value, inputs the correction Ji°C and outputs the corrected set value. Therefore, an inducer blade angle adjuster for adjusting the blade angle of the inducer was provided.

[Effect]

In this case, the nozzle area variable mechanism of the turbine of multiple turbochargers, or the same mechanism and compressor.

The variable area mechanism of the wind inducer is controlled at the same time by one regulator, and the control is also performed by feed control using a computer.

The present invention can be applied to an internal combustion engine that has a variable passage area of a turbine nozzle or a compressor inducer and is equipped with a supercharger that is controlled by a computer.

〔Example〕

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

FIG. 1 is an explanatory diagram showing one embodiment of the apparatus according to the present invention.

In the figure, devices that are the same as the conventional example shown in Figure 2 are given the same numbers, and the numbers for the second and subsequent superchargers are omitted because they are of the same system as the first.0 Exhaust Gas and Air Flow The flow 9 operates in the same manner as described in the conventional example.

The variable area nozzle 5 is driven by a blade angle adjuster 17 via a link mechanism 18'.

The blade angle adjuster 17 is set by the computer 10, and the set value ψ7 is finely adjusted by the detected value ψ7' of the blade angle detector 16.

The computer 10 has a blade angle setting device 101. Blade angle comparator 10
3. It has built-in analog-digital converter A/I) 102 and denoital-to-analog converter %104.

The operation in the case of the above configuration will be described.

As shown in FIG. 3, the nozzle area has an optimum value for the engine load.

There is a relationship between the nozzle area and the blade angle as shown in Figure 4.
The figure shows the optimum blade angle corresponding to the engine load.

The blade angle setter 101 stores the relationships shown in FIGS. 3 and 4, and outputs a set value ψ corresponding to the set engine load.

The electrical signal ψ is converted into a mechanical signal by the blade angle adjuster 17, and the entire variable area nozzle 5 is mechanically adjusted via the link mechanism 18.

The actual blade angle ψ is detected as a stain signal by the blade angle detector [6], is converted into a denoitial value by the VD converter [02] built in the conbeater 10, and is input to the blade angle comparator 103.

The output ψ of the blade angle setter 101 is also input to the blade angle comparator 103, and the correction amount Δ of υψ7 is calculated based on the deviation between ψJ and ψ7.
ψT is output, converted into an analog quantity by the D/A converter 104, and transmitted to the blade angle adjuster 17 as an electrical signal.

The blade angle adjuster 17 corrects the set value ψT by Δψ7 and outputs it as ψ.

Eventually, ψ7 and ψ hand match, and the control is completed.

The above control is repeated according to the fluctuations in the engine load. [Effects of the Invention] In the above case, the following effects are achieved. Because of the control, the nozzle area of each individual supercharger is changed by the same amount at the same time.

((b) Therefore, the nozzle area of each of the plurality of superchargers at a certain time is always constant.

←→ Therefore, a phenomenon in which a large amount of exhaust gas flows to one supercharger and a small amount to the other does not occur.

) This means that the exhaust energy acting on each turbine 6 is the same amount, and multiple superchargers rotate at the same speed, produce the same air pressure, and supply the same amount of air to the engine. do.

((E) As mentioned above, the operating status of multiple superchargers is always the same, so they are not affected by the other one, so
Stable operation is possible without fluctuation.

It is possible to obtain good combustion with less black smoke and an increase in fuel amount.

[Example 2] FIG. 5 shows another embodiment according to the invention.

In addition to the turbine 6 in FIG. 1, the area of the inducer 21 of the compressor 12 is made variable, and as with the turbine side, the inducers 21 of a plurality of superchargers are simultaneously controlled by one blade angle adjuster 22. In addition to the relationships shown in FIGS. 3 and 4 on the turbine side, the blade angle setting device 101 in this case has a relationship between the turbine side nozzle 5 and the compressor side inducer 21 as shown in FIG. It has the function to memorize and output all related information. This added function allows the supercharger to be fine-tuned to suit the engine.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram showing an embodiment of the device according to the present invention, Fig. 2 is an explanatory diagram showing a conventional supercharging control device, and Fig. 3 is an explanatory diagram showing the relationship between engine load and nozzle area. A line diagram showing. Fig. 4 is a diagram showing the relationship between nozzle area and nozzle blade angle, Fig. 5 is an explanatory diagram showing another embodiment of the device according to the present invention, and Fig. 6 is a diagram showing the relationship between nozzle blade angle and inducer blade. FIG. 3 is a diagram showing the relationship with corners. 1... Cylinder, 3... Static pressure pipe, 4... Exhaust pipe,
5... Nozzle, 6... Turbine, 10... Combita. 12...Compressor, 16...Nozzle blade angle detector. 17... Nozzle blade angle adjuster, 21... Inducer. 22... Inducer blade angle adjuster, 101... Blade angle setting device, 103... Nozzle blade angle comparator. Rice 47-One (1--#3 figure

Claims (2)

[Claims] 1. In an internal combustion engine having multiple superchargers, a nozzle blade angle detector detects the blade angle of the turbine nozzle, a nozzle blade angle setting device outputs a set value corresponding to the engine load, and the detected blade angle and the above setting. A nozzle blade angle comparator that compares the values and outputs a correction amount for the same set value, and a nozzle blade angle adjustment that inputs the correction amount and outputs the corrected setting value to adjust the blade angle of the turbine nozzle. A supercharger control device characterized by being equipped with a device. 2. In an internal combustion engine having multiple superchargers, a nozzle blade angle detector detects the blade angle of the turbine nozzle, a nozzle blade angle setting device outputs a set value corresponding to the engine load, and the detected blade angle and the above setting. A nozzle blade angle comparator that compares the values and outputs a correction amount for the same set value, and a nozzle blade angle adjustment that inputs the correction amount and outputs the corrected setting value to adjust the blade angle of the turbine nozzle. an inducer blade angle detector that detects the blade angle of the inducer of the compressor; and an inducer blade angle setting device that is installed in parallel with the nozzle blade angle setting device and outputs a setting value corresponding to the nozzle blade angle setting value. an inducer blade angle comparator that compares the detected blade angle with the set value and outputs a correction amount for the set value;
A supercharger control device comprising an inducer blade angle adjuster that receives the correction amount and outputs the corrected set value to adjust the blade angle of the inducer.