ES2360993B1 - WATER INJECTION SYSTEM IN INTERNAL COMBUSTION ENGINE AND INJECTION PROCEDURE. - Google Patents

Abstract

Water injection system in internal combustion engine and injection procedure. # System comprising a water reservoir (1), water supply means, dissociation or dissociator means (2) of water and injection means in the intake manifold of the engine (1) or another point of the air inlet circuit, causing the dissociation of water into hydrogen and oxygen. The dissociator (2) is constituted by at least one narrow passage (2) of the water passage, said conduit (21) having at least one nicrome wire (22) along its length, these nicrome wires (22) being connected with an electrical source for the generation of an inductive current. The water injection process comprises the dissociation of the water before injection into the intake air of the engine (1), the dissociated water being supplied synchronously with the speed of rotation of the engine (1).

Description

Water injection system in internal combustion engine and injection procedure. Object of the invention

The present invention refers to an internal combustion engine water injection system in order to optimize its operation. Background of the invention

Various water injection systems are known in the admission of an internal combustion engine, for example a diesel or otto cycle engine preferably, which consist of injecting a certain amount of water into the intake air to said engine.

For example, PCT application WO2007 / 068260 by Mr. Christian Javier García Rojas, describes a system that by means of a pump injects a small amount of distilled water into the intake air by means of one or more sprayers arranged in the intake manifold.

Also, the Spanish invention patent ES530493 of the firm Forschungsgesellschaft Fur Energietechnik und Verbrennungsmotoren MBH. describes a method and device for injecting water and alcohol into the intake air of an internal combustion engine with the intention of increasing the amount of molecules with OH (hydroxide) bonds that improve subsequent combustion.

All these systems basically comprise a water reservoir, water delivery means and injection means in the intake manifold of the engine, and rely on the fact that water from a certain temperature dissociates into its basic components, which They are oxygen and hydrogen. The hydrogen separated in the combustion chamber has a great interaction with the mixture of air and fuel, helping to make the explosion or in fl ammation more correct. In turn, the supply of extra oxygen that is produced allows the combustion atmosphere to be optimal for complete combustion of the fuel, which prevents the escape of hydrocarbons without burning in the exhaust gases.

However, these systems present a considerable problem, which is that water is introduced into the engine by direct spraying into the intake manifold, so that it is not in an optimal state for proper combustion once mixed with the air and the fuel.

This situation leads to the fact that the addition of water is not as effective, and there are even problems of accumulation of unused liquid water in different parts of the engine due to its incorrect spraying and dissolution in the air fl ow. Description of the invention

The water injection system in internal combustion engine and injection procedure, object of this invention, presents some technical peculiarities intended to improve combustion in the engine, obtaining a lower consumption, a greater power and a reduction of the pollutant gases emitted as a result of more complete assisted combustion.

For this, the system comprises means of dissociation or dissociator of water before its introduction into the engine by means of injection. This dissociated water in the oxygen and hydrogen that make it up allows combustion to be more spontaneous and complete. On the one hand, hydrogen provides more energy to the engine in its combustion and the extraordinary supply of oxygen to the natural oxygen of the air allows the burning of fuels to be complete, thus avoiding the emission of hydrocarbons without burning and reducing the amount of carbon dioxide emitted by the engine to the atmosphere.

This operation represents a notable improvement over other water injection systems, in which water is added directly and decomposes inside the engine when reaching the high temperatures that occur in the chamber during the burning of the fuel, thereby It consumes energy and its effect is delayed inconveniently.

In a main embodiment, the dissociator is constituted by a narrow water passage conduit, said conduit having at least one nicchromic wire (iron alloy, nickel and chromium) arranged along its length, this nicromic wire being connected with a source electrical for the generation of an inductive current, such as the car battery itself. These wires cause the dissociation of water in its basic components thanks to the inductive current applied.

Thus, in a first embodiment the water passage passage in the dissociator is spirally formed inside an external reinforcing housing.

In other embodiments the duct can be placed longitudinally simple or multiple stacked in a prismatic housing or other conformations.

The water supply means from the tank comprise a discharge pump associated with said water tank, for example submerged and a pressure regulator supplied by said pump, to avoid overpressures in the system and allow a constant and regulated supply pressure.

For the correct dosing of the dissociated water, it is provided that the delivery means comprise a micropump of impulses of water supply to the dissociator, this impulse micropump being connected with a control unit for the regulation of the impulses of water supply to dissociate synchronized with the engine speed. Thus, the dosage of dissociated water in the intake air fl ow corresponds advantageously with the opening of the valves that determine the intake of incoming air, for example.

This control unit can also have various functions such as starting the system operation only from a minimum engine speed, a safety start-up without water, or system diagnosis, in addition to the aforementioned dissociated water dosing. .

The injection means comprise an unused dissociated water return valve and a dissociated water diffuser in the engine. Thus, the system itself is allowed to have internal drainage means when the engine stops or does not need water injection and correct means of water injection by diffusion in the air flow.

The diffuser is connected directly to the intake manifold of the engine, which does not require noticeable changes in the mechanics of the vehicle or its aesthetic appearance.

With this system, the procedure of water injection in an internal combustion engine includes the dissociation of water before the injection into the intake air of the engine, with no power remaining

in combustion and improvement through the contribution of oxygen and hydrogen.

In addition, the procedure provides that dissociated water is supplied synchronously with the speed of rotation of the engine to perform a correct dosage according to the consumption needs and the times when the air flow fills the combustion chambers to avoid unnecessary condensation of water in the intake manifold. Description of the fi gures

To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings is attached to the present specification in which, for illustrative and non-limiting purposes, the following has been represented:

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Figure 1 shows a scheme of the system.

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Figure 2 shows a schematic view of the spirally shaped dissociator.

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Figure 3 shows a schematic view of the dissociator configured by a longitudinal conduit.

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Figure 4 shows a cross section of a dissociator conduit. Preferred Embodiment of the Invention

As can be seen in the referenced fi gures, the system comprises a water tank (1) with a drive means, a dissociator (2) and means for injecting the dissociated water into the intake air flow of an engine (3 ) of internal combustion.

The drive means comprise a pump

(41)

of immersion in the water tank

(one)

and a pressure regulator (42) supplied by said pump. Next to the regulator is a pulse micropump (43), which is associated with an electronic control unit (5) that monitors the operation of the motor (3) and mainly its rotation speed and combustion points in the chambers for dose the water supplied by the micropump (43) to the engine (3).

At the outlet of the impulse micropump (43) is the dissociator (2) of the water that separates the oxygen and hydrogen it contains. The dissociator (2) is constituted by a conduit (21) at least 10 centimeters long and approximately 4 millimeters in diameter, formed of an insulating material, through which the water to be separated circulates. Within said conduit (21) there are two parallel nicrom alloy wires (22), thus represented in Figure 4, each wire (22) being of flat configuration, 1.5 millimeters wide and 0.6 millimeters thick approximately. Said wires (22) are connected to an electrical power source (not shown), for the generation of an induction current. This power supply can be the battery of the vehicle in the case of the motor (1) of a car.

This conduit (22) is spirally arranged inside an external reinforcing casing (23a), for example polyester-shaped, thus represented in the figure

2.

In an alternative embodiment, shown in Figure 3, the splitter (2) presents the conduit

(twenty-one)

arranged longitudinally within a reinforcing housing (23b).

The injection means comprise a return valve (6), connected to the dissociator outlet.

(2)

and which is associated with a diffuser (62) of the water in the air fl ow, said return valve having

(61)

a secondary outlet (63) for connection to the water tank (1) and return the unincorporated water to the intake air fl ow.

In this case, the diffuser (63) is connected to the intake manifold (not shown) of the motor (1).

Once the nature of the invention has been sufficiently described, as well as an example of a preferred embodiment, it is stated to the appropriate effects that the materials, shape, size and arrangement of the described elements may be modified, as long as this does not imply an alteration. of the essential features of the invention that are claimed below.

Claims (10)

one.

Water injection system in an internal combustion engine, of the type comprising a water tank (1), water supply means and injection means in the engine intake manifold (1) or another point of the air inlet circuit, characterized in that it comprises dissociation means or dissociator (2) of the water before its introduction into the engine (1) by the injection means to cause the dissociation of the water in hydrogen and oxygen.

2.

System according to claim 1, characterized in that the dissociator (2) is constituted by at least one narrow passage (21) of water passage, said conduit (21) having at least one nichrome wire (22) along its length, being these nicróm wires (22) connected to an electrical source for the generation of an inductive current.

3.

System according to claim 2, characterized in that the conduit (21) is spirally formed inside an external reinforcement housing (23a).

Four.

System according to claim 1, characterized in that the delivery means comprise a supply pump (41) associated with the water tank

(1) and a pressure regulator (42) supplied by said pump (41).

5.

System according to claim 1, characterized in that the delivery means comprise a micropump (43) of water supply pulses to the dissociator (2), this pulse micropump (43) being connected to a control unit (5) for regulation of the water supply pulses to be dissociated synchronized with the speed of rotation of the motor (1).

6.

System according to claim 1, characterized in that the injection means comprise a return valve (61) of the unused dissociated water and a diffuser (62) of the dissociated water in the engine.

7.

System according to claim 6, characterized in that the diffuser (63) is connected directly to the intake manifold of the engine (1).

8.

Procedure of water injection in internal combustion engine, characterized in that it comprises the dissociation of water before injection into the intake air of the engine (1).

9.

Method according to claim 8, characterized in that the dissociated water is supplied synchronously with the speed of rotation of the motor (1).

SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 200801870 SPAIN Date of submission of the application: 06.19.2008 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: F02M27 / 04 (01.01.2006) F02B51 / 04 (01.01.2006) RELEVANT DOCUMENTS

Category

Documents cited Claims Affected

X X X

US 2005/0029120 A1 (BAR-GADDA) 10.02.2005, paragraphs 35.36; Figure 2. WO 9222679 A1 (MEYER) 23.12.1992, the whole document. US 4052139 A (PAILLAUD et alii) 04.10.1977, the whole document. 1-9 1-9 1-9

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 08.03.2011

Examiner Manuel Fluvià Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 200801870 Minimum documentation searched (classification system followed by classification symbols) F02M, F02B Electronic databases consulted during the search (name of the database and, if possible, terms of search used) EPODOC, WPI State of the Art Report Page 2/4  WRITTEN OPINION Application number: 200801870 Date of Written Opinion: 08.03.2011 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1 to 9 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1 to 9 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 200801870 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

US 2005/0029120 A1 (BAR-GADDA) 02.10.2005

D02

WO 92/22679 A1 (MEYER) 23.12.1992

D03

US 4052139 A (PAILLAUD et alii) 04.10.1977

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement Patent Law, article 4.1: New inventions are patentable, which involve inventive activity and are susceptible of industrial application, .... Patent Law, article 6.1. An invention is considered to be new when it is not included in the state of the art. The state of the art is constituted by everything that before the date of filing of the patent application has been made accessible to the public ... Patent Law, Article 8.1. An invention is considered to involve an inventive activity if that does not result from the state of the art in an obvious manner to one skilled in the art. Patent Regulations Article 29.6. The report on the state of the art will include a written opinion, preliminary and without obligation, as to whether the invention object of the patent application apparently meets the patentability requirements established in the Law, and in particular, with reference to the results of the search, if the invention can be considered new, implies inventive activity and is susceptible of industrial application.  It is considered preliminary and without obligation that the object of the request (claims from 1 to 9) is included in documents D01 D02 and D03 as regards its content and before the priority date. D1 disclosed a hydrogen and oxygen water separator (title) for combustion in alternative thermal engines (page 1) by means of an electromagnetic field generated by an electric coil (Figure 3 (16) and paragraphs 35 and 36); additionally, pumps, valves, diffusers and auxiliaries are described for this (figure 2). D2 disclosed the production of dissociated hydrogen from water for injection in engines and burners by applying electromagnetic fields directly to the gaseous fluid (summary and its figure) with the auxiliaries to complete combustion energy production. D3 disclosed the dissociation of substances, including water, to inject the resulting gas in the combustion process, doing so by applying at least one electromagnetic field to the fluid (10, 6 and 7 in figure and summary), burning it in the energy process, by means of the nozzle or manifold 1. These are the relevant technical characteristics of the object of the request, and that solve the same technical problem of hydrogen generation from the dissociation of water by electrical means (not electrolytic, which is more frequent) and its use in engines and combustion, so apparently the patent application would lack the patentability requirement of the novelty under article 6 of the current law 11/86 of March 20 of Patents, when confronted with the state of the technique represented by the aforementioned three documents. State of the Art Report Page 4/4