JPS5830418A - Intake device of engine with supercharger - Google Patents

Abstract

PURPOSE:To eliminate chattering of a relief valve, by forming a relief port part in the downstream side of a blower in an intake passage and setting a surge tank to the relief port. CONSTITUTION:A turbine 26 is rotated and driven by exhaust gas from a cylinder 3, and a blower 19 performs a supercharge of air. The air from the blower 19 is once stored in a surge tank 20 and fed to an intake manifold 13. Even if supercharge pressure from the blower 19 is caused with pulsation, the surge tank 20 can absorb the pulsation. Further the air stored in the surge tank 20 is fed to the cylinder 3, and pulsation of air pressure due to opening and closing of an intake valve 7 is not generated. Still further, chattering of a relief valve is never caused.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the intake air of a supercharger, and the present invention has a detailed history. This invention relates to an engine intake system.

The intake system of the turbocharged engine #t, 1y1 drives the turbine using the energy of the exhaust gas of the regular engine,
With the blower directly connected to this turbine,
By feeding compressed air into the ring, the filling efficiency of the ensono is completely improved and the output performance of the ensono is improved. In the intake system of this turbocharged Ensono, if the supercharging pressure becomes too high during the Ensono's Hatake load operation, there is a risk of abnormal combustion such as non-king.
Because of i, the boost pressure can be prevented from rising above a predetermined value by means such as installing a pressure valve in the intake passage.
On the other hand, it is known that pulsations and ribs of intake air occur in the intake passage of an engine due to the opening and closing of the intake valve. Since this occurrence is unavoidable, it has already been proposed to install a Sarno tank in the intake passage in order to eliminate these pulsating noises.
No. 03 Publication 44i).

The entire purpose of the present invention is to arrange the above-mentioned pressure IJ-F valve so as to ensure the most stable operation in an engine provided with a surge tank in the intake passage.

The intake system for a supercharged engine according to the present invention is characterized in that a surge tank is installed in the IJ leaf port formed on the blower r flow side of the intake passage.

According to the intake system CD for a supercharged engine of the present invention, by accumulating the intake air from the blower in the surge tank, the pulsation of the intake pressure based on the characteristic V of the blower and the opening/closing of the intake valve are Pulse of intake pressure! Since 1IliI can be efficiently absorbed, air can be completely taken into the cylinder in a clean state without surging, and therefore the engine can be operated in a stable state. Since a subtank is provided in the engine, intake pulsation does not act on the relief valve and cause the relief valve to flop.

Hereinafter, an intake system 1v for a supercharged engine according to an example of an uninvented R7 hard drive will be explained with reference to the attached drawing t-1.

The figure is a functional diagram of the intake system It2 of the Ennon 1 supercharger.

The engine 1 has a +t11 cylinder 3 and a piston 4 fitted to this cylinder 3, which is the same as a normal engine.The upper part of this cylinder 3 has a suction
5 and an exhaust port 6 have been completely formed. The intake port 5 and the exhaust port 6 are provided with an intake valve 7 and an exhaust valve 8, respectively, which are opened and closed in no time.

” The two ports I and 5 and the exhaust port 6 have i1, respectively.
The intake system 9 and the air system 1O are connected. Intake system 9
The engine is equipped with an intake pipe section 11, a throttle valve 12, and an intake manifold 13. An air cleaner 14 is provided at the inlet end of the intake pipe section 1, and an air flow sensor 15 for detecting the amount of air flowing through the intake pipe section 11 is arranged downstream of this air cleaner. In addition, an air cleaner/sink 1 is provided near the intake port 5 of the intake manifold 13.
A fuel injection device 1 that injects fuel at a timing according to the inflow air detected by 5 and the rotation of the engine/no/l injected by the engine rotation speed 16
17 are provided. This fuel injector t17id:
, a control device f composed of a microcomputer, etc.
It is driven and controlled by it 1.8.

A blower 19 for supercharging is disposed in the middle of the intake pipe section 11.
A surge tank 20 is provided between the throttle valve 12 and the throttle valve 12 . A relief port 21 is formed in the surge tank 20, and the relief port 21 is communicated with the upstream #1u of the 10-force 19 of the intake pipe portion 11 through a relief pipe line 22. This relief tube N! r2
A relief valve 23 that opens when the supercharging pressure exceeds a predetermined value is disposed in the middle of the pump 2. In addition, relief boat 2
1 may be connected to the atmosphere.

The exhaust system 10 includes an exhaust manifold 24 and an exhaust pipe line 25
The exhaust pipe 24 includes a turbine 26 that is driven by the energy of the exhaust gas passing through the exhaust pipe 24.
are arranged. The turbine 26 is operatively connected to the blower 19 by a rotating shaft 27 such that when the turbine 26 rotates, the blower 19 rotates.

Next, the operation of the intake system of the supercharged ennon having the structure described above will be explained.

In the driving state of the engine 1, in one line, the turbine 26 is
It is rotationally driven by exhaust gas from the cylinder 3. This rotation of the turbine 26 also drives the blower 19 to rotate, thereby supercharging the air. From this processor 19'
g! Qi is once accumulated in the surge tank 20, and '4! air intake manifold 1
3 and subjected to combustion.

In this way, in the intake system of the present invention, the blower 19
Since the air from the pump is temporarily stored in the surge tank 20, even if there is a pulsation in the pressure of the air from the blower 19, that is, the boost pressure, it can be absorbed by the surge tank 20. Since the air is supplied to the air pump ring 3 accumulated in the surge tank 20, there is almost no pulsation of air pressure caused by opening and closing of the intake tank 7.

The relief valve 23 opens when the supercharging pressure generated by the blower 19 exceeds a predetermined pressure, and releases the intake air to the upstream side of the blower 19 of the intake metal part 11 or to the atmosphere, thereby preventing the engine from being overfilled. This valve is designed to prevent the pressure at which this valve operates.
If the output value is set to the value at which the pressure sensitive valve No. 03 operates, it can also function as a valve for preventing surging caused by abnormal pressure, similar to this pressure sensitive valve.

[Brief explanation of the drawing]

The figure is a structural and functional diagram showing Akira's supercharged Ennon air supply system. DESCRIPTION OF SYMBOLS 1... Engine, 2... Intake device, 19... Prower 120... Surge tank, 21... Relief port, 22... Relief pipe line, 23... Relief valve, 2 .6 ...Turbine 107

Claims (1)

[Claims] A blower for supercharging is installed in the intake passage, and the intake pressure of the blower F flow is above a predetermined value, and is formed on the downstream side of the blower in the intake passage. Pressure IJ to release intake air to the upstream side of the blower in the intake passage In the intake system of a turbocharged engine equipped with a leaf valve, the pressure IJ on the downstream side of the blower in the intake passage. An intake system for Ensono with a supercharger, which is characterized by the installation.