JPS60164624A - Engine with turbocharger - Google Patents

Abstract

PURPOSE:To make a flow characteristic vary according to an operating state of an engine fitted with a small turbocharger being hard to install a variable stator blade, by controlling a control valve, which opens or closes either of two exhaust passages, according to the engine operating state. CONSTITUTION:Since no supercharging pressure is required in time of idling or low load, a control valve 30 is made full open and back pressure in an engine is lowered down to some extent whereby average effective pressure comes to the maximum. Likewise, in time of acceleration, a throttle degree of the control valve 30 is more intersified than in time of a steady state. An engine operating state is grasped with an engine speed and a fundamental injection quantity whereby a step motor 36 controls the control valve 30 for its opening or closing according to the operating state of an engine 11.

Description

[Detailed Description of the Invention] The present invention describes the operating state of a coupe charger engine in which the engine's zero air pressure engine drives the air turbine, and the shaft air compressor drives the compressor to run the engine. This relates to variable flow rate characteristics of the exhaust gas.

In general, if you want to make the engine Riki Takashima zero, it is not necessary to use a relatively large turbocharged Y-hair, but the engine and
, A#9jJ Wb due to insufficient rotation in the high rotation range Ekubin O rotation
There is a tendency for it to become difficult to come out, and for the supercharging delay to become large during acceleration.

In order to achieve low fuel consumption in an oversized engine, using an engine with a relatively large displacement of 1,000,000 yen and 140,000 yen from a large engine. By generating 0 torque such as engine engine torque, and making the file reel N'v as strong as that of the 91 engine general 1 car,
Overdrawing! There is no price listed) and it's a no-brainer.''・Seri (1
Since it is rare for an engine to run at a relatively high load, it has the effect of an F1-like engine with a variable displacement engine with a variable number of cylinders.

For this purpose, it is necessary to be able to obtain high supercharging from low-speed engine rotation, and it is also necessary to ensure that there is no delay in the response of the energized F4.

It is relatively suitable for a tJ\ type turbocharger jack for a component like ヱO. Therefore, there are few people who experience the phenomenon of peaking out under compressor tube 0 capacity.Furthermore, if the engine 0 back pressure increases, the number of pumping gases will increase, which will go against the low melting point.

Since these trends in low and high rotational speed ranges are in a trade-off relationship with each other, turbochargers are currently selected as a compromise between true fuel efficiency and high output.

As a solution, a relatively small turbo + Yard system, one for each side of the two cylinder groups of the engine, and two for the paratorle, and one for the low speed rotation region. Coupon charger of 2 r＞%f fresh 1 at a time
One possibility is to use a one-piece overpass system in which the cylinders are rotated in the middle of the engine, and the O2 exhaust is sent from each cylinder group in the high-speed 6-rpm range to each turbo charger to operate two cooler chargers.
When the second charge Y, which is limited in the low-speed first rotation range, is restored to the high-speed rotation range, there is no time limit for nursing to occur in the kelp.

Regarding the large turbochargers of diesel engines for large trucks, as a solution to the above-mentioned problem of low/commercial speed rotational interference, a variable turbo charger was introduced to control the turbine O flow rate characteristics. Mata-IIfl using Shizuru
This is reflected in the method's ability to make performance variable.

In this case, several stator blades are required circumferentially around the turbine rotor.

In hard engines such as those for passenger cars, a turbine rotor with a diameter of 50 mu and a zero turbocharger is generally used, so the stator blades are similar to the GDS. Generally speaking, variable vanes are supported by a cantilevered shaft, but if the vane is in an engine, the temperature skin is less than 700'C. However, the Solin engine is 900.
The stator blades are not subject to centrifugal stress like the turbine rotor, and this is caused by high-speed airflow, intermittent ejection of H1 air, etc. Due to the action of excitation force, the pulsation fLv makes it easy to fracture.If the vane blade is destroyed, the turbine rotor will also be crushed by the O debris. As a result, the ratio between the thickness of the outer layer and the thickness of the outer layer becomes smaller, which increases the strength of the engine and makes it easier to turn when loaded. JIX type turbocharger of type engine
-r:'P)ru.

In order to effectively deal with the above-mentioned problems, the LO engine was developed to appropriately change the flow rate characteristics of the turbine according to the operating conditions of the engine without using variable stator blades. The objective is to obtain an engine with a small turbocharger that can deliver high torque, high output, and high response speed. .

EMBODIMENT OF THE INVENTION To explain based on the drawing on the left, reference numeral 1 denotes an air cleaner that filters the air that is received, and the flow rate of the air that has passed through the air cleaner is detected by an air flow sensor 2. Reference numeral 4 consists of a compressor 5 and an air turbine 6. A compressor blower 7 and an exhaust turbine rotor 8 are coaxially fixed, and the air turbine rotor 8 drives a compressor front opening γ7.

The air that has passed through the airflow sensor 2 is forced up by the compressor 5, passes through the Ft throttle valve 9F, enters the length tank 1°, and from the boogey tank is connected to the intake V13° which communicates between it and each cylinder 12, 12 of the engine 110. 13...
··to go into. To each of the barking V, the east side is in front of you.
4,14・The river is frozen over.

The injector has a melt injection control unit F, (
The air flow rate input as an electric signal from the air 20 - engine sensor 2 and the engine rotational speed input as an electric signal from the well-known engine failure detection means 15 are determined by the computer) 3. Various corrections are made to the basic injection l in order to obtain a suitable multiplication ratio depending on the operating condition. It is a consideration valve that injects reeds into the intake port by the injection valve which has a synchronized valve opening time of 1 hour on the left.

In this way, ν3 and square 4 were combined, and the number of energy was increased] 2゜1
2... Enter white 1. It is ejected into the trachea 16 with a burning sensation. The air passages and the trachea are in conflict, and the air passages in each cylinder are 12.12 and 17.17.
··left.

The exhaust passage 19 is assembled into one exhaust passage 19 at the collecting part 18), and the two Oto air passages are connected to the turbine housing 200 1st introduction part 21 of the exhaust turbine 6. /# branches into 23a and 23b.

The main air passages 23a and 23b are connected to the turbine I.
＼Using 20 is formed in white and divided into two 12 axially from the partition wall 244! Human crawling parts 25a, 25b
The anus and the anus are connected.

Each of the exhaust J ports 23a is provided with a manhole 27 in the exhaust bypass 1 that connects the air passage and the exhaust turbine rotor 8 downstream O air outlet n-26. 1 in the hole
±Pinch bypass valve? 8 are in close contact with each other, and the H-air bypass valve is opened and closed by the actuator 29, which is activated by the supercharging force, which is bent through an appropriate link mechanism.

This means that when positive supercharging is set, the exhaust high and high pressure valves enter 28.
Open the air hole 7 by 1 inch, and set the exhaust turbine rotor 8 to bypass 1 to release the air. 0 boost pressure I
J4p burning island. This O-control device is a completely foreign technology that is used in most engines with a turbo charger, so I will not explain the details of its structure.

The above-mentioned L airway 23b is restricted from opening and closing on the left. Collection 11 # Valve 30 is facing the L airway with a constant rotation angle! The number 23b is made into a communication hole 32 which communicates the proboscis, the passage force note, and the downstream side. u1 valve 30
The upper part is aligned with the center of the 51 rotation axis and is shaped into -a, h or @
33, a lever/'<'-34 is fixed to one end of the shaft part, and a mouth/end 35 is connected to the S and lever'.

A pinion '38 is fixed to the step motor shaft 37, which is rotatable and supported, and is fixed to the h shaft part 9, meshing with fY'4-7A0, and coaxial with the gear 40. The levers 1 to 41 are fixed, a rod 35 is connected to the lever, and the control valve 30 is rotated one counterclockwise rotation by a step motor 360 rotations. The 4-speed reduction mechanism consisting of the pinion 38 and the N-A 40 achieves appropriate deceleration, and the Tep Morph 36-Pal or O control valve is reduced to 300 rotation angles to improve control accuracy. I'm going to take a look at the weight cutter.

If a hook (not shown) is bent toward the opening direction of the control valve 30, the control valve 30. It is possible to prevent an excessive increase in the back pressure of the engine if the hard worker 1 is in trouble.

Since the turbo engine 1 is configured as follows, the exhaust energy X (flow rate As a result, the expansion head becomes larger, and the speed of the crawl section 25a side increases, and the crawl section 242 gets stuck in the ejector action at the crawl merging section 42, accelerating the exhaust from the crawl section 25b, and moves the crawl toward the flow section 242. The outflow velocity force from the first air turbine row 778 to the first air turbine row 778 increases as the opening degree of the control valve 300 is reduced. Marimata crawl part 25b meat pressure is also crawl 2
Lee is lower than the 51st white pressure, and the prefectural government and the government are lower. From this, it can be clearly seen that a vortex is generated in the crawl confluence section 42.

The OA becomes stronger as the opening degree of the control valve 30/) is reduced. Due to this loss, the theoretical speed ratio becomes Fl-0, and the control valve 3
When the temperature is 0 and it is quiet, the efficiency of the turbine is approximately 5% lower than when it is open.

Therefore, despite this decrease in efficiency, the ``type IN valve 30''
If the left throttle is too much, the tension will increase, which will lead to an increase in the back pressure of the engine, but the supercharging effect will not increase. tends to decline.

From this, the opening degree t of the control valve 30/) and the rotational position 1 of the engine O are determined by experiment. The settings should be set so that the average effective pressure is maximum under normal electrical conditions.This allows the turbocharger engine to operate at its highest fatigue efficiency, and improves the turbine efficiency. It is important to keep the impact of the decline to a minimum.

Since the A-bell pressure is not adjusted properly when the engine is in the air or on a low negative street, the average effective pressure is maximized by opening the #1 valve 30 to lower the back pressure of the engine.

However, when considering the response to the engine speed, it is essential to keep the control valve 30 and the metal alloy in a throttled state and keep the engine rotating at high speed. At this time O system%430f7)
The degree of opening should be decided based on the reduction of costs and the point of agreement.

Also, if there is a 1J21 test, the transient story, that is, the vehicle power U
At high speed, the control valve 30's temperature is higher than when it is in the constant state of 8. As a result, Turbine O Kamune 1st grade student improved,
By improving the 4#@na at a low rate, the average dynamic pressure can be increased and the engine O acceleration performance can be improved.

In consideration of the specifics, depending on the opening speed of the intake throttle valve 90 that detects the driver's speed and motivation, the opening of the intake throttle valve 90 is adjusted to 9 different opening degrees for each operating state of the electrolytic state. You can make distant relatives by writing d\.

When performing these controls, the human step motor 3
6 is the engine 11/) In order to appropriately control the opening and closing of the rain control valve 30 according to the operating state, the engine rotational speed iz
The engine operating condition should be checked more clearly.

First, through actual experiments, we have determined that the two parameters representing the engine operating condition are the basic injection amount and the engine speed. The rotation angle from the step motor 360 reference & position when opening is determined.

The method used in the Sanskrit test is to provide a variable O rotation load directly connected to the power shaft of the engine 110, divide the negative power into a predetermined 0 stage 1'l, and adjust the opening degree of the intake throttle valve 9 to a predetermined angle (for example, When the engine rotational speed I for these constant OI reaches the most fixed state, 0, the step motor 360 curtain ratio position, 0 rotation angle, and basic injection it are detected. The answer to this question is based on the basic injection amount and engine speed, and the rotation angle from 360 step motors based on the three-dimensional curved surface 0 bird sign and dirt. A desired rotation angle from the base rate position of the step motor 360 is calculated for each predetermined value of the basic injection amount and engine speed.

Then, this is stored in the step motor control unit (computer) 43i in a glue-only memory (ROM) in advance.

From engineering knit 3 to human rtsubu 7-ku control unit, well 4
3 times are inputted and converted into a binary digital signal representing the input of the ROM and a binary digital signal representing the intermediate value of the adjacent Sakurasho relaxation value, which is not recorded or deleted, and is transferred from the ROM to the step motor at the position. In addition to calling the zero rotation angle from the 36 reference devices, the rotation angle from the intermediate value and the 360 step motor guide system is calculated by interpolation calculation, and if necessary, it can be used to cover transient conditions such as during acceleration. ,
make up for the difference. Then, the rotation angle from the reference edge 1 of the Omata step 7-ta 360 ★ Forward rotation to the target, the false angle of operation ▲ Pal human signal from the human step Moog control/reunit 43 to the human step Tanabata 36 g + @, 1P3
0r> Opening/closing control.

As described above, the turbocharged engine can greatly increase the rotational speed of the turbine depending on the engine operating condition, and the general effect will shine from the engine's higher speed rotation. During high rotational loads,
By reducing the air flow path resistance, it is possible to obtain high output, wide rotation speed and range, high overpressure, and large torque.

Furthermore, # of the turbine and t from high speed rotation are also upper blades (riha).
Pelton water has a large force due to the powerful force of a car, but at this time, the flow rate of the gas from the zero-person crawl confluence section 42 increases, speeding up the rotation of the engine and increasing the responsiveness of the turbocharger.

Vehicles equipped with this kind of Turbonaija engine have lower running fuel efficiency due to the fact that the final gear is not used for high-speed use, or the frequency of use of the high-speed gear increases. d Rokoto can cum.

In the middle of the change, the control valve 30 is only fully closed and fully opened.
Alternatively, the control #f may be simply activated by controlling in one step of -1: 4' open, intermediate, and fully open. This precise control valve and drive actuator can also be used for pneumatic actuators, etc.

Alternatively, the left main control valve 30 may be closed or throttled only when accelerating the turbine, and the control may be performed solely for the purpose of improving performance.

Regarding the 1st-air bypass q, the control valve 30 and the 1st-air piper hole 27 were provided in separate exhaust passages 23b and 23a, but the 1st-air piper hole 27 was installed in separate exhaust passages 23b and 23a. Entrance hole 271. If it does not open, the boost pressure can be controlled by the control valve 30 when the air pipe lv manhole 21 opens, and the same airway is installed. I can't handle it.

Also, is the Otoki bypass hole 27 a branch part? ? It may also be provided on the upstream road 19.

Are these arranged in the turbine housing? Although the area is shown as having a uniform h4 area, the area balance may be changed depending on the width of the area.

In addition, by dividing the engine's cylinders into two 0-cylinder groups and using a tV Larel Nishimoto-equipped 0-turbo engine with a turbocharger, the 1st cylinder is made smaller.
Furthermore, it is also possible to make fS answer face 1.

As explained above, according to the present invention, the provision of variable stator blades allows the turbine flow rate eJ to be appropriately controlled in accordance with the engine's flow rate, even in an engine that can overcome the difficulty of using a small turbocharger. It has the effect of making you feel better.

[Brief explanation of drawings]

FIG. 1 shows an O-girder assembly according to an embodiment of the present invention, and the turbocharger Y# is a cross-sectional view of the stairs. 2.Air temperature sensor, 3.Fuel injection controller L
l unit, 4...y-, i: charger, 5...compressor, 6... air turbine, 9... intake throttle valve, 1
1...Engine, 12...Cylinder, 14...Injector, 15...Engine rotation speed detection means, 17, 19°23
a, 23b... Sugitokiyuro, 18... Gathering part, ? ?・・・
Branching portion, 25 a, 25 b・- Also crawling portion, 30・
・Control valve, 32...Communication hole, 33...Shaft, 34...Lever, 35...Rod, 36...Tepmorph, 37
・・Shaft part, 38・・Pinion, 39・・Shaft, 40・・N
A, 41... Lever, 42... Also, crawl confluence, 4
3. Human tip mork control unit. Patent applicant Hiroshi Yamazaki-Q

Claims (1)

[Claims] 1 The air passages from the engine cylinder group 0 are gathered into one, and downstream from the gathering part, they are branched into two air passages, and the air passages are divided into two in the axial direction. The air is connected to each of the turbine scrolls w10, and a $1 valve is inserted to open and close one of the two branched exhaust paths. A patented turbocharger engine that can be properly opened as soon as the engine is turned over.