JPS5844260A - Rare mixed gas pre-supplying device for diesel engine - Google Patents

Abstract

PURPOSE:To save fuel consumption and reduce a vibration as well as a noise by making the captioned device with a fuel supplier and a heating member so that evaporation of a pre-supplied mixed gas may be performed effectively. CONSTITUTION:A fuel injection nozzle 2 is fitted into an air intake pipe 1 and a fuel supply port 2a communicates with an injection pump so that pressurized fuel is supplied. A heating member 3a is fitted into the air intake pipe 1 in a position where the fuel injected from a fuel injection hole 2b comes into collision with said member 3. A car speed signal 7 and a vehicle load signal 8 are inputted to a control circuit 5, and predetermined fuel corresponding to an engine load is injected from the fuel injection nozzle 2 to come into collision with the heating member 3a, then said fuel is vaporized and introduced into the air intake pipe 1. Accordingly, fuel consumption is saved and a vibration and a noise may be reduced by holding down a rise in pressure at starting of combustion to a low rate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lean mixture child feeding device for reducing vibration and noise of a diesel engine and purifying exhaust gas.

Generally, it is known that the vibration noise of a diesel engine is at a higher level than that of a gasoline engine.

For this reason, the reality is that vehicles equipped with diesel engines are causing noise pollution, especially when the vehicle is idling, causing discomfort to the driver and those around the vehicle. As one method of reducing vibration and noise of such a diesel engine, a method is known in which a portion of the fuel is mixed with intake air to improve combustion.

According to this method, the absorbed fuel causes a low-temperature oxidation reaction during the compression process, generating heat and producing intermediate products, which shorten the arrival delay of the main fuel and at the same time promote combustion. It has been recognized that by speeding up fuel completion, it reduces vibration and noise, and at the same time has the effect of reducing smoke emissions.

D i. Since diesel engines are generally powered using light oil, it is considered practical to use the same fuel, light oil, for the premixture. However, diesel oil has poor vaporization properties, and the reality is that a portion of the diesel oil that is injected into the intake pipe adheres to the wall of the intake pipe and is not used effectively, resulting in a worsening of fuel efficiency.

The present invention was devised to solve the above-mentioned problems, and aims to improve combustion without deteriorating fuel efficiency by improving the vaporization of premixture O and mixing uniformly. Another object of the present invention is to provide a lean mixture negative signal supply device for a diesel engine that reduces engine vibration and noise and also reduces exhaust smoke. In order to achieve the above object, the present invention is equipped with a dilute mixed negative fuel supply device that supplies a small amount of fuel at the same time as intake with an inhalation root, and tJ
In the diesel engine, the lean mixture negative sign supply device has a special configuration in which it is composed of a fuel supply device and a heating member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawing is a system configuration diagram of an embodiment of the present invention. An intake pipe 1 is connected to a front part of a collecting pipe of an intake manifold of a diesel engine (not shown).

A fuel injection nozzle 2 is attached to the intake pipe 1.
The fuel supply port 2a of the fuel injection nozzle 2 communicates with the inside of a main fuel injection valve (not shown), and pressurized fuel is supplied thereto. Further, the fuel injection hole 2 of the fuel injection nozzle 2
A heating member 3 having a heating portion 3a is attached to the intake pipe 1 at a position where the fuel injected from side b collides with the intake pipe 1.

Incidentally, the heating member 3 is a gray resistor which is also used in the P-Prada 4, a quick-heating machine for preheating when cold.

5 is a control circuit to which a key switch signal 6, a vehicle speed signal 7, a vehicle load detection signal 8, etc. are input, and a fast heating dust glow f
The fuel injection valve 4, the heating member (glow register) 30, the energization switch 9, 10, 11, 12, and the injection amount of the fuel injection nozzle are controlled.

The operation of the embodiment of the present invention will be explained.

When starting the engine, turn on switches 9, 10, and 12 to connect the quick heat glow lugs 4 and the heating member (gray resistor) 3 in parallel according to the key switch signal 6. When the temperature is reached, a signal from a temperature sensor (not shown) turns ON, and switches 10 and 12 turn OF.
When F is turned on, the switch 11 is turned on, and the rapid heating type glow plug 4 and the heating member (glow resistor) 3 are switched to series connection, and afterglow is started. Also, when the rapid heating plates a-f 4 reach a predetermined temperature, a signal from a temperature sensor (not shown) causes an inverter run (not shown).
goes out, indicating that the start is ready. - At time ζ0, the heating portion 3a% of the heating member (glow register) 3 has reached a predetermined temperature. When the engine starts, a main fuel injection knob (not shown) rotates, and the injection nozzle 2 is also pressurized via the fuel supply port 21 of the injection nozzle 2 to a predetermined internal pressure depending on the rotation speed. Then, the vehicle speed signal 7 and the vehicle load signal 8 are input to the control circuit 5 .

According to the control signal, a predetermined amount of fuel corresponding to the engine load is injected from the fuel injection nozzle 2, and collides with the heating member (goo resistor) 30 heated to a high temperature, It evaporates, is mixed uniformly with the intake air, and flows into the intake pipe.
guided to the combustion chamber. Vibration and noise can be reduced by shortening the ignition delay and keeping the rate of pressure increase at the start of combustion low, without increasing fuel efficiency.

In the present invention, we mainly considered noise and vibration during cold conditions, so we adopted a system in which the heating member also serves as a glow register used in an afterglow system.
This lean premixing method is also effective in improving output and fuel efficiency under high loads, so it is of course possible to supply electric power to the heating member alone. The method is also covered in this - without any line,
In short, gas oil fuel with poor vaporization is supplied to the heating 11,
It is important to evaporate and vaporize to create a homogeneous mixture0
As explained above, in the lean mixture negative signal supply device for a diesel engine according to the present invention, the lean mixture negative signal supply device is configured by the fuel supply device and the heating member, so that it can be easily configured. This makes it possible to vaporize the air-fuel mixture as well as possible and mix it uniformly, improving combustion without deteriorating fuel efficiency, reducing engine vibration and noise, and reducing exhaust smoke. It has excellent effects such as bringing about.

[Brief explanation of the drawing]

The figure is a system configuration diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Intake pipe, 2... Injection nozzle, 3-- Heating member, 4... Rapid heating part glove 2g, 5-... Control circuit. Patent Applicant Japan Auto Parts Research Institute Co., Ltd. Patent Application Agent Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Kyosuke Tsuchinakayama Patent Attorney Akira Yamaguchi

Claims (1)

[Claims] 1. In a diesel engine equipped with a lean mixture child supply device that supplies a small amount of 0 fuel at the same time as intake during the intake stroke, 1. The lean mixture child supply device is used as a fuel supply device and a heating member. A lean mixture child feeder for a diesel engine, characterized by a double configuration. λ A lean diesel engine according to claim S, in which a fuel injection nozzle is used as a means for supplying the lean mixture, and the internal pressure of the main fuel supply injection 471 is used as the pressurizing means.
Mixture child feeder. 3. The invention is characterized in that it uses a heating member that utilizes n-force supplied to the glue register, which is used in a fast heating globog system for preheating in cold conditions. Lean mixture prediction for O diesel engine described in Section 2 □
Feeding device. 4. A lean mixture child feeder for a diesel engine according to claim 1 or expanded claim 2, which uses a glow register used in a fast-heating glow bag system for preheating in cold conditions as a heating member. .