JP2002317642A - Internal combustion engine thermal efficiency improving device by hot water injection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of improving thermal efficiency of an internal combustion engine by injecting hot water at an optimum temperature, quantity and timing. SOLUTION: An injection nozzle 3 and a heating device 4 are connected to the engine 2 in order. A injection pump 5 is connected thereto through a pipe 1a, and a water tank 6 is connected thereto through a pipe 1b. An automatic control device 7 is provided for controlling a supply pressure of the water by the temperature of the engine 2 and the water injected. The hot water is injected into the engine 2 at the optimum temperature, quantity and timing by a backflow preventive valve 8 for preventing vaporization and counterflow of the hot water in the pipe 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention aims at increasing the thermal efficiency of an internal combustion engine by injecting high-temperature water into the engine.

[0002]

2. Description of the Related Art Conventionally, there has been an internal combustion engine that changes fuel explosion energy into rotation by ignition by a spark plug and ignition by fuel injection using compression heat.

[0003]

This has the following disadvantages. Thermal efficiency was low because only the explosive energy of the fuel was used as rotational power. The present invention has been made to reduce this drawback.

[0004]

An injection nozzle (3) and a heating device (4) are connected to an engine (2) in this order, and a heating device (4) is provided.
Is connected to an injection pump (5) via a pipe (1a),
A water tank (6) is connected thereto via a pipe (1b). A check valve (8) is provided between the heating device (4) and the engine of the injection pump (5).
A control device (7) for controlling the water pumping in response to the temperature of the water to be injected and the temperature of the engine (2) is provided. The present invention is a device for improving the thermal efficiency of an internal combustion engine having the above configuration.

[0005]

Embodiments of the present invention will be described below. (B) Nozzle (3) with incendiary nozzle for engine (2)
Are connected in sequence, an injection pump (5) is connected to the heating device (4) via a pipe (1a), and a water tank (6) is connected thereto via a pipe (1b). (B) A check valve (8) is connected between the heating device (4) and the engine of the injection pump (5). (C) The injection pump (5) is similar to that used for a normal Dadel engine, and controls the pumping of water in response to the temperature of water to be injected into it and the temperature of the engine (2). (7) is provided. According to the present invention, the water injected into the engine (2) is heated to an optimum temperature by the heating device (4) with the above structure,
The optimal amount is injected by the injection pump (5) at the best timing between before ignition and after ignition. When this device is used as an ignition device, the water to be injected is heated to a temperature higher than the ignition point of the fuel, and the water is injected at the ignition timing.
The control device (7) sets the temperature of the jetted water to the set temperature,
The engine (2) also controls pumping so that water is not injected until the temperature reaches the set temperature. Fire nozzle (3)
Does not leak or inject into the engine (2) except for the action of the water expansion even when the water in the device reaches the set temperature, and opens by the pressure of the injection pump (5). .
The squirt pump (5) has a structure very similar to a normal injection pump used in the Dedell engine, and has a structure in which the amount and timing of water to be injected can be adjusted by the engine speed and the accelerator opening. The backflow prevention valve (8) prevents the heated water from flowing back toward the injection pump (5) due to the pressure thereof and evaporating the water in the heating device (4). As shown in FIG. 2, the pipe (1a) is branched from the injection pump (5) and the check valve (8),
Pipe (1c) connected behind the injection pump (5)
May be provided with an automatic valve (9) that does not close until the engine (2) and the water to be injected reach a set temperature, so that the water is not injected into the engine (2) until both of them reach the set temperature. . FIG. 3 shows a timing opening / closing type nozzle (10) that opens and closes according to the vertical timing of a piston instead of the injection nozzle (3) shown in FIG. 1, and uses a pressurizing device (11) instead of the injection pump (5). This is a method in which pressure is applied, the timing opening / closing nozzle (10) is opened at a set timing, and water is jetted. In the case of the method of FIG. 3, as a method of suppressing the injection until the temperature of the engine (2) and the water to be injected reaches the set temperature, the control device (7) is provided in the pressurizing device (11) or as shown in FIG. A method is also conceivable in which an automatic valve (9) is provided in such a pipe (1c) to allow the pipe to escape to the rear of the pressurizing device (11) or to control the timing opening / closing nozzle (10). There are a method of using the present invention as an ignition device, a method of injecting water before or simultaneously with ignition, and a method of injecting water after ignition. In each case, a steam explosion is added to a fuel explosion, and depending on the timing, steam is added to the fuel explosion. Positive effects can be expected on combustion explosions. Conventionally, there has been a Dadel engine that injects fuel into the engine, but the present invention is characterized by improving the thermal efficiency of the internal combustion engine by injecting water.

[0006]

The present invention utilizes cooling water, exhaust heat of exhaust pipes, etc.
Since water is heated, energy loss required for heating can be reduced, steam explosion is added to fuel explosion, and depending on injection timing, favorable effects on combustion explosion can be expected due to the effect of water vapor. If the fuel is injected at an ignition timing higher than the ignition point of, the present invention can be used for an ignition device.

[Brief description of the drawings]

FIG. 1 is a diagram showing the arrangement and piping of each part of the present invention.

FIG. 2 and

FIG. 3 is a view showing the arrangement and piping of each part showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1a Pipe 1b Pipe 2 Engine 3 Injection nozzle 4 Heating device 5 Injection pump 6 Water tank 7 Control device 8 Check valve 9 Automatic valve 10 Timing opening / closing nozzle 11 Pressurizing device

Claims (1)

[Claims] An injection nozzle (3) and a heating device (4) are connected in sequence to an engine (2), and a pipe (1a) is connected to the heating device (4).
To the injection pump (5) via which
A water tank (6) is connected via b), and an automatic control device (7) for controlling the water pumping in response to the engine temperature and the temperature of the injected water is provided in the injection pump (5). A high-temperature water injection device for improving the heat efficiency of an internal combustion engine, wherein a check valve (8) is provided between the heating device (4) and the injection pump (5).