JPS58131302A - Suction swiral generating device due to shrouded suction valve of engine - Google Patents

Abstract

PURPOSE:To produce swirl matched to the engine speed by a method wherein a shrouded suction valve is rotated in accordance with the engine speed. CONSTITUTION:The engine speed of an engine is detected by an electronic mechanism 20 in order to control oil pressure by means of a lubricating mechanism 21 in response to the signal detected thereon. The oil pressure is supplied to an actuator and link mechanism 22 in order to control a piston 24, which moves a rack 18 so as to rotate the suction valve. When the engine speed is low, the rack 18 is pivoted in the direction of an arrow M so that the shroud 3 of the suction valve is advanced into the entrance of a suction port 2, resulting in increasing inflow resistance of air and consequently accelerating swirl. When the engine speed becomes high, the rack 18 is moved in the direction of an arrow K and consequently the pinion 17 is rotated in the direction an arrow F so that the shroud 3 of the suction valve is receded from the entrance of the suction port 2, resulting in generating swirl matched to the engine speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake swirl generation device using a shroud intake valve of an engine. The purpose is to have lunch.

Kenji's shrouded intake valve is equipped with an arc-shaped shroud that connects part of the intake port's entrance to the combustion chamber in order to efficiently create a vortex in the outside air that flows in from the intake port. However, Shroud's rank 1 in this population
In order to ensure 1, the intake valve was not rotated, so when the engine speed is high, the swirl tends to be excessive, and when the engine speed is low, the swirl tends to be insufficient. In addition, since the intake valve and the valve seat are in contact with each other at the 4-' opening, they often become uneven, which often reduces their durability.

The present invention solves the above-mentioned drawbacks, and in an engine equipped with an intake valve with a tube-loud, the intake valve is configured to be able to be driven back and forth at variable angles by a variable-angle drive device, and when the engine speed is low, vortex flow occurs. By driving the valley shroud at varying angles so as to cause a strong vortex flow and a weak vortex flow when the engine speed is high, excessive swirl occurs when the engine speed is high and excessive swirl occurs when the engine speed is low. By correcting the lack of swirl, it is possible to ensure a correct swirl, improve combustion performance, and eliminate uneven wear of the intake valve.

Hereinafter, embodiments of the invention will be described based on the drawings.

Figure 1 shows a direct injection overhead box diesel engine.
＠ Bo mechanism diagram, Figure 2 is a longitudinal sectional view of the engine cylinder head, Figure 3 is the intake valve angle change, and the system diagram of the drive device.
FIG. 4 is a plan view of the combustion process. A piston 7 is slidably fitted on the cylinder block 10 of the direct injection diesel engine 1, and is linked to the crankshaft 12 of the engine via a connection #8. It's a trap.

There is 1 fuel between the upper end of the piston l and the cylinder head 9!
! Eight chambers 5 are formed, and the combustion chamber 5 contains the nozzle of the fuel injection nozzle 11 inserted into the head side, and the intake port 2 and exhaust port 16 are open.

The intake 9'F4 facing the intake boat 2 has its head 4a.
It is a V-type strainer that can freely open and close the intake boat port 15 by pressing it with the rocker arm 14 moved by the T-crank 1II112.

An arc-shaped shroud 6 is attached to the upper blade of the intake valve 4 at the contact point with the valve seat 16, and this shroud acts as an inflow resistance for the received air flowing into the intake port, generating a vortex flow in the combustion chamber 5. At the same time, the intake valve 4 is driven by the variable angle pillar 41 with the valve axis 'r as the rotation axis by the variable angle drive device it6.
Il is made.

As shown in FIG. 3, this variable angle drive device 6 consists of an electronic mechanism 20 that detects the rotational speed of the engine and converts it into an electric signal, and an electronic mechanism 20 that converts the rotational speed of the engine into an electric signal, and an electronic mechanism 20 that converts this air pressure into hydraulic pressure. The electronic device 420 includes an actuator link mechanism 22 that changes the oil pressure into intake rotation (intake rotation), and an electronic device 420 that changes the engine rotation speed detection table [B and a control device C that changes the run-in rotation ridge to an electric signal. It consists of

Also, @ Name Shinfu 12 uses the engine's lubrication system N, and the oil is pumped from the oil pan G by the lubrication pump P.
The first part is returned to the oil pan after filling the engine's main salary S, but this part is branched off and a solenoid valve υ is provided, and one side is connected to the above control device i1C. and the other is linked to hydraulic actuator A,
By adjusting the Y field pressure, the overflowing lubricating oil is returned to the TANHI lubrication system N.

The hydraulic actuator A has a valve box 2 into which lubricating oil flows.
5, a piston 24 that slides under hydraulic pressure, and an elastic spring 25 that resists the hydraulic pressure, and the other end of the piston is connected to the intake valve 4.
An actuator link mechanism 22 is configured in conjunction with a rack 18 that meshes with a pinion 11 provided at the upper end.

The intake vortex generation system constructed in this way detects the engine speed with its component B and converts it into an electric signal with the control device C. This signal is sent to the solenoid valve and changes in the oil pressure in this box are detected. is transmitted to the hydraulic actuator to create the rack/binion #111, but as the engine speed increases, a current flows through the solenoid valve υ, narrowing the oil passage and reducing the total hydraulic pressure.As a result, the hydraulic actuator A The piston is suppressed 1 and the rack 18 is moved to 60,000 degrees, and the pinion 11 that engages with the piston is rotated 41 in the direction F, so that the intake hasher shroud 6 is moved out of the intake port 2. This reduces nitrogen inflow resistance and suppresses swirl.

On the other hand, when the engine speed decreases, a low current flows through the solenoid valve υ, opening the oil passage and reducing the oil pressure. As a result, the piston 24 is pushed back by the elastic spring 25 of the hydraulic actuator A, and the rack 18 is By moving the pinion 17 that engages with the pinion 17 in the E direction, the shroud 6 of the intake valve advances into the intake port 2, thereby increasing the inflow resistance of air and promoting swirl.

Therefore, as the engine rotational speed V increases, the shroud 5 rotates in the direction of exiting from the intake boat inlet. (the angle behind the engine) increases by the order of llT, and the required swirl g6 (the ratio of the swirl to the engine speed) corresponding to the engine speed can be achieved.

Hereinafter, the effects of the present invention will be described. Since the shroud is automatically driven to adjust the angle according to the engine rotation speed, the shroud advances into the intake port population at low speeds to compensate for the lack of swirl, while the cylinder At high speeds, the shroud moves out of the intake port and causes excessive cooling, so it is possible to create an appropriate swirl at any rotational speed and improve combustion performance.

In addition, since the rotation of the intake valve changes its circumference, interferes with the valve seat, and the RH driver's contact point moves, we removed the eccentric pillar of the intake valve and examined its durability. You can

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a mechanical diagram of a direct injection overhead box type diesel engine, and FIG.
Figure 3 is a vertical sectional view of the lower part of the cylinder head of the engine, Figure 3 is a system diagram of the intake square variable angle 1 drive system, Figure 4 is a flat diagram of the combustion chamber, and Figure 5 is the engine speed and shroud installation angle. It is a relationship diagram of 1... Ennon, 2... Intake boat, 6... Shroud, 4... Intake square, 5... Combustion chamber, 6... Angling, drive device, E... Eddy flow promotion direction, F... Whirlpool flow suppression “Lateral direction, f...
Koukisho's -yf111 heart.

Claims (1)

[Claims] 1. The intake port 2 of the engine 1 is freely opened and closed by the intake valve 4 with the shroud 5, and the combustion chamber 5 is opened and closed by the shroud 6.
The intake valve 4 is configured to cause a vortex in the intake air, and the intake valve 4 is configured to have a variable angle reciprocating drive port f function with the center T as the rotation axis, and the intake valve 4 is configured to have a variable angle reciprocating drive port f function with a variable angle drive device 6. c shows that the shroud 6 is configured to drive the intake air 5f-4 to the side t where the rotational speed of the engine 1 is lower, the stronger the vortex is generated, and the higher the rotational speed is, the shroud 6 is driven to the side F where the vortex is generated weakly.
Intake vortex generation device using shroud intake valve of engine with fj characteristic