TWI541168B - Gaseous Fuel Automatic Control System for Marine Internal Combustion Engine - Google Patents

Description

Gaseous fuel automatic control system for marine internal combustion engine

The present invention relates to a system for an internal combustion engine, and more particularly to a gaseous fuel automatic control system for a marine internal combustion engine.

According to the increasing shortage of energy, the price of oil continues to rise, thereby increasing the fuel cost of cars, locomotives and ships while driving. In particular, ships need to sail at sea for a long time. In order to reduce the fuel cost during shipping, most ships will choose heavy oil as the main fuel.

However, heavy oil has the characteristics of large molecular weight, high viscosity, and components including hydrocarbons, sulfur, and trace amounts of inorganic compounds. Therefore, heavy oil is prone to sulfides and suspended particles after combustion, and affects the human body and the global environment.

To this end, IMO International Maritime Organization has established various relevant regulations for air pollution prevention and control, and also imposes strict restrictions on the emissions of ships during navigation, especially the emissions of sulfides and nitrogen oxides in the exhaust gas.

Since the heavy oil is completely burned, it can not only improve the heat conversion efficiency (the efficiency of converting thermal energy into kinetic energy), but also reduce the emissions of sulfides and nitrogen oxides contained in the exhaust gas. And not only heavy oil will have the above problems, but other types of fuels, such as gasoline, diesel and other fuels, will have an impact on the environment when they are not completely combusted.

Although some people control the fuel supplied by the fuel supply system by detecting whether the air-fuel ratio (mixing ratio between air and fuel) flowing into the internal combustion engine satisfies a preset value. The amount, in turn, allows the heavy oil to burn completely. However, the general internal combustion engine is a homogeneous intake compression ignition engine (HCCI). This type of internal combustion engine uses a piston to compress air and fuel. In the process of compression, the fuel is used because of friction between molecules. Producing spontaneous combustion), so that when the internal combustion engine is in operation, it is easy to cause spontaneous combustion due to some uncertain factors, or the fuel can not be completely burned when it is compressed, which will not only cause waste of fuel, but also generate harmful gas. Or substance, in violation of the IMO International Maritime Organization regulations for ship emissions. Accordingly, the inventors believe that such an internal combustion engine needs to be improved.

In order to solve the deficiencies described in the prior art, the inventors propose a gaseous fuel automatic control system for a marine internal combustion engine, comprising:

A gaseous fuel supply unit: the gaseous fuel supply unit is coupled to a first tubular body at an outlet section.

A liquid fuel supply unit: the liquid fuel supply unit is coupled to a fourth tube body at the outlet section.

An internal combustion engine: the inlet section of the internal combustion engine is respectively connected to a second pipe body and the fourth pipe body, and the outlet section is connected to a third pipe body, and a section of the second pipe body is connected to the first pipe body.

A regulating valve: the regulating valve is disposed at a section of the first pipe body.

a gaseous fuel detector: the gaseous fuel detector is disposed in a section of the second pipe body and is located between the first pipe body and an inlet section of the internal combustion engine, and the gaseous fuel detector is configured to detect the inflow The amount of gaseous fuel of the internal combustion engine is obtained as a gaseous fuel detection signal.

a processor: the processor is electrically connected to the regulating valve and the gaseous fuel detector respectively, wherein the processor writes a preset value of a gaseous fuel and a regulating valve control program, wherein the regulating valve control program is available to the processor Execution: controlling the opening degree of the regulating valve according to the deviation degree between the gaseous fuel detecting signal and the preset value of the gaseous fuel.

According to the above configuration, the present invention mainly mixes the gaseous fuel with the air and sends it into the internal combustion engine, and then allows the liquid fuel to be mixed in the internal combustion engine with the gaseous fuel and air, thereby allowing the internal combustion engine to operate. The overall fuel is fully combusted, providing more energy to improve the efficiency of the internal combustion engine and reduce the generation of harmful exhaust gases in order to comply with the International Environmental Protection Organization's regulations on ship emissions.

The gaseous fuel detector and the processor and the control valve are used to maintain the gaseous fuel flowing into the internal combustion engine within a preset range to maintain the internal combustion engine at a better working efficiency.

(A) ‧‧‧Ship internal combustion engine system

(1) ‧‧‧Gaseous fuel supply unit

(1A) ‧‧‧Gaseous fuel supply unit

(11)‧‧‧First tube

(11A)‧‧‧First tube

(2)‧‧‧ Internal combustion engine

(21)‧‧‧Second body

(211)‧‧‧First pipe section

(212) ‧‧‧Second section

(213)‧‧‧Bumps

(214)‧‧‧Second regulating valve

(215)‧‧‧Traffic Detector

(22) ‧‧‧3rd body

(23) ‧‧‧Temperature Detector

(24)‧‧‧ Pressure detector

(3)‧‧‧First regulating valve

(3A)‧‧‧First regulating valve

(4) ‧‧‧Gaseous fuel detector

(5) ‧‧‧ carbon monoxide detector

(6) ‧‧‧ processor

(7)‧‧‧Connected joints

(71) ‧‧‧ Ontology

(72) ‧‧‧ Holes

(73) ‧‧‧Perforation

(74)‧‧‧Conical tube

(741)‧‧‧First tapered section

(742)‧‧‧Second tapered section

(743)‧‧‧ Shoulder

(744) ‧ ‧ Adapter

(745)‧‧‧The third tapered section

(75)‧‧‧L type groove

(751)‧‧‧Upright groove

(752)‧‧‧lateral trench

(76) ‧‧‧Second perforation

(8) ‧‧‧ turbocharger

(9) ‧‧‧liquid fuel supply unit

(91)‧‧‧Fourth body

The first figure is a schematic diagram of the connection of various components of the present invention

The second diagram is a schematic diagram of the connection between the processor and each component.

The third figure is a schematic diagram of the connection between the first pipe section and the joint joint.

The fourth figure is a sectional view of the joint

The fifth picture is a schematic view of the conical tube placed in the tunnel of the joint.

The sixth figure is an example of a tapered tube

The construction, features and embodiments of the present invention are illustrated by the accompanying drawings, which will be further understood by the review.

Referring to the first figure, the present invention relates to a gas combustion of a marine internal combustion engine. Material automatic control system, the ship internal combustion engine system (A) includes:

a gaseous fuel supply unit (1): the gaseous fuel supply unit (1) is connected to a first pipe body (11) at an outlet section, and the gaseous fuel provided by the gaseous fuel supply unit (1) may be: gas, hydrogen, etc. The advantages of the present invention are described below with the gaseous fuel being hydrogen.

a liquid fuel supply unit (9): the liquid fuel supply unit (9) is connected to a fourth pipe body (91) at the outlet section, and the liquid fuel supplied by the liquid fuel supply unit (9) can be: gasoline, heavy oil, Diesel and so on.

An internal combustion engine (2): the internal combustion engine (2) is connected to a second pipe body (21) and the fourth pipe body (91) respectively at the inlet section, and a third pipe body (22) is connected to the outlet section, the second A section of the tubular body (21) communicates with the first tubular body (22).

a first regulating valve (3): the first regulating valve (3) is disposed at a section of the first pipe body (11), and the gaseous fuel can be determined by adjusting the opening degree of the first regulating valve (3) The amount of the gaseous fuel supply unit (1) flowing into the second pipe body (21).

a gaseous fuel detector (4): the gaseous fuel detector (4) is disposed at a section of the second pipe body (21) and located at the first pipe body (11) and the internal combustion engine (2) Between the inlet sections, the gaseous fuel detector (4) is configured to detect the amount of gaseous fuel flowing into the internal combustion engine (2) to obtain a gaseous fuel detection signal.

a processor (6): please refer to the second figure, the processor (6) is electrically connected to the first regulating valve (3) and the gaseous fuel detector (4), respectively. 6) Write a gaseous fuel a preset value and a regulating valve control program, the regulating valve control program is executable by the processor (6): controlling the first regulating valve according to the deviation of the gaseous fuel detecting signal from the preset value of the gaseous fuel (3) The opening degree.

Therefore, with the above configuration, the present invention can achieve the following advantages:

(1) Since the internal combustion engine is a homogeneous air intake compression ignition engine (HCCI), the internal combustion engine uses a piston to compress air and fuel. In the process of compression, the fuel is caused by friction between molecules. Produces spontaneous combustion. In view of the characteristics of the above-mentioned marine internal combustion engine, the present invention first uses the gaseous fuel to mix with air and then delivers it to the internal combustion engine (2), and then delivers the liquid fuel to the internal combustion engine (2) for mixing, thereby making the overall fuel prone to occur. Self-ignition, which in turn allows the whole fuel to be completely burned to improve combustion efficiency and reduce the generation of harmful exhaust gas or substances. Especially when the liquid fuel is heavy oil, the combustion efficiency of the heavy oil can be improved by using the structure of the present invention, and the heavy oil passes through After complete combustion, it is not only less likely to be wasted, but also less prone to sulfides and suspended particles, and contributes to the protection of the global environment, and can also meet the specifications set by the IMO International Maritime Organization.

(2) controlling the opening degree of the first regulating valve (3) by detecting the amount of the gaseous fuel flowing into the internal combustion engine (2), thereby maintaining the flow rate of the gaseous fuel to be fixed, so that the internal combustion engine ( 2) Being able to maintain better work efficiency.

(3) The present invention only needs to set a corresponding preset value of gaseous fuel for different liquid fuels before use, and when the ship is driving at sea, it is switched to liquid fuel of different oil specifications for different sailing states. As a source of power (for example, when the liquid fuel used is switched from marine light diesel to marine heavy diesel), the present invention can immediately control the amount of corresponding gaseous fuel according to the requirements of different liquid fuels to make the internal combustion engine ( 2) Maintain better work efficiency when operating.

Please refer to the first figure in conjunction with the second figure, the ship internal combustion engine system (A) of the present invention is also It can be implemented that: the internal combustion engine (2) is provided with a temperature detector (23) and a pressure detector (24), wherein the temperature detector (23) is configured to detect the cylinder in the internal combustion engine (2) Temperature, and a temperature detecting signal is obtained; the pressure detector (24) is configured to detect the pressure in the cylinder of the internal combustion engine (2) to obtain a pressure detecting signal; the processor (6) is respectively electrically Connecting the temperature detector (23) and the pressure detector (24), the processor (6) writes a temperature preset value and a pressure preset value, and the regulator valve control program is further available to the processor (6) Execution: controlling the opening of the first regulating valve (3) according to the degree of deviation of the temperature detecting signal from the preset value of the temperature and the degree of deviation of the pressure detecting signal from the preset value of the pressure degree.

Therefore, this embodiment enables the present invention to control the first regulating valve according to the degree of deviation of the temperature detecting signal from the preset temperature value and the degree of deviation of the pressure detecting signal from the preset value of the pressure. The opening of 3) is used to further control the flow rate of the gaseous fuel to further enhance the aforementioned advantages.

Referring to the first figure and the second figure and the third figure, in order to facilitate the formation of the second tube body (21) to communicate with the first tube body (11), the present invention may also be implemented as: the second The pipe body (21) includes a first pipe section (211) and a second pipe section (212); a joint joint (7) includes a body (71) through which a hole (72) penetrates the body (71), and the body (71) is provided with a through hole (73) communicating with the hole (72), the hole (72) is connected to the first pipe section (211) at one end, and the second pipe section (212) is connected to the other end, and the perforation (73) is connected at one end. The first tube body (11). The connecting means of the connecting joint (7) and the first pipe section (211), the second pipe section (212), and the first pipe body (11) are not limited to screwing, and the connecting piece can also be used for the purpose of connection. . And in order to enable the present invention to mix two different gaseous fuels, the body (71) is further provided with a perforation (76) for the first tube (11A) and another gaseous fuel supply unit. (1A) forming a communication, and one of the first pipe bodies (11A) is also provided with another first regulating valve (3A), and the first A regulating valve (3A) is electrically connected to the processor (6).

The following is a description of one of the means of connection, and the connection joint (7) facilitates the connection of the first pipe section (211): please refer to the first figure, the third figure and the fourth figure, one end of the hole (72) The hole wall is provided with an L-shaped groove (75) including an upright vertical groove (751) and a lateral groove (752), and the other end of the upright groove (751) is One end of the lateral groove (752) is connected to form a communication, and one end of the vertical groove (751) is formed to be transparent at the edge of the hole of the hole (72); a convex piece is disposed outside one end of the first pipe section (211) (213) ). Therefore, when one end of the first pipe segment (211) is engaged with the joint joint (7), the bump (213) is inserted into the upright groove (751), and then moved laterally to the lateral groove (752). The bump (213) is clamped by the lateral groove (752) to form a stable connection between the first pipe segment (211) and the joint joint (7).

Moreover, the channels (72) are preferably tapered from the outside to the inside from the two ends, such that the apertures at the two ends of the channel (72) are larger than the aperture of the central portion of the channel (72), and the air flows through the channel ( a rate of 72), thereby causing a negative pressure between the tunnel (72) and the first tubular body (11) to drive fuel in the gaseous fuel supply unit (1) into the second tubular body (21) , mixed with air. In order to increase the speed of mixing the fuel and the air, please refer to the fifth figure, the connecting joint (7) further includes a conical tube (74), the first end of the conical tube (74) is disposed at the same The opening in the tunnel (72) and the first end of the tapered tube (74) has a smaller aperture than the aperture (72).

Referring to FIG. 6 again, the tapered tube (74) can be further configured to include a first tapered tubular section (741) and a second tapered tubular section (742), the first tapered tubular section (741) And the aperture of the second tapered tube section (742) is gradually tapered from the second end toward the first end, and the second end aperture of the second tapered tube section (742) is smaller than the first tapered tube section (741) a first end aperture along the first end aperture of the first tapered tube section (741) A shoulder (743) is disposed inwardly, and a second end edge of the second tapered pipe section (742) is provided to the peripheral portion (744), and the second tapered pipe section (742) is partially disposed on The first tapered pipe section (741) is disposed, and the abutting portion (744) abuts against the shoulder portion (745).

The present invention is not limited to the conical tube (74) including only the first conical tube section (741) and the second conical tube section (742), and may also be a conical section of other apertured apertures, thereby allowing the user to The conical tube segments of different opening calibers are selected as desired. For example, the conical tube (74) preferably includes the first to third conical tube segments (741, 742, 745).

In order to avoid the high temperature generated when the internal combustion engine (2) is actuated, and affect the service life of the joint (7), the body (71) is preferably made of refractory material, and the outer side of the body (71) is covered with a layer of stainless steel. A stainless layer is formed to prevent the joint (7) from being rusted.

Generally installed in a marine turbocharger, the angle of the turbine blades is fixed, thereby providing sufficient air for the internal combustion engine to use, due to the flow of gas inside the overall system, the turbocharger is below a certain speed, the turbine The amount of air provided by the supercharger will exceed the amount of load that the internal combustion engine can load. At this time, the whole system will be forced to enter the air, and the air will be forcedly transported into the internal combustion engine due to the operating speed of the internal combustion engine and the compressed air. The amount is proportional, causing the internal combustion engine to over-operate and causing a decrease in service life, and the turbocharger reduces the energy generated by the fuel in the internal combustion engine by delivering excess air into the internal combustion engine.

Referring to the first figure, in order to solve the above problem, the present invention further provides a turbocharger (8), the outlet section of the turbocharger (8) is connected to the other end of the first pipe section (211), And the first pipe section (211) is sequentially provided with a second regulating valve (214) and a flow detector (215), wherein the flow detector (215) is configured to detect the first pipe section (211) Air flow, and a flow signal is obtained, and the processor (6) is electrically connected to the first a regulating valve (214) and the flow detector (215), the processor (6) writing a flow control program, wherein the flow control program is operable by the processor (6) to determine the second according to the flow signal The opening of the valve (214) is adjusted, whereby the amount of air flowing into the internal combustion engine (2) is controlled.

Since the internal combustion engine (2) is in operation, the compression ratio of the air may be insufficient, or the ratio between the liquid fuel and the air may be insufficient, or the liquid fuel supply unit (9) may provide the internal combustion engine (2) The liquid fuel is advanced in time, causing the internal combustion engine (2) to generate carbon monoxide and other harmful substances during operation. In order to solve the above problems, please refer to the first figure, the ship internal combustion engine system (A) of the present invention can further be further implemented as:

a carbon monoxide detector (5): the carbon monoxide detector (5) is disposed at a section of the third tube (23), and the carbon monoxide detector (5) is configured to detect the third tube (23) The concentration of carbon monoxide in the interior gives a concentration detection signal.

a processor (6): the processor (6) writes a preset value, the control valve control program is further executable by the processor (6): according to the concentration detection signal and the concentration preset The degree of deviation of the value is used to control the opening of the second regulating valve (214).

Therefore, by utilizing the degree of deviation between the concentration detection signal and the preset value of the concentration, the opening degree of the second regulating valve (214) is further controlled, thereby controlling the amount of air entering the internal combustion engine (2), thereby solving the foregoing Inadequacies.

In summary, the present invention is indeed in line with industrial utilization, and is not found in publications or publicly used before application, nor is it known to the public, and has non-obvious knowledge, conforms to patentable requirements, and patents are filed according to law. .

However, the above is a preferred embodiment of the present invention in the industry, and The equal changes in the scope of patents are all within the scope of the subject matter of this case.

(A) ‧‧‧Ship internal combustion engine system

(1) ‧‧‧Gaseous fuel supply unit

(1A) ‧‧‧Gaseous fuel supply unit

(11)‧‧‧First tube

(11A)‧‧‧First tube

(2)‧‧‧ Internal combustion engine

(21)‧‧‧Second body

(211)‧‧‧First pipe section

(212) ‧‧‧Second section

(214)‧‧‧Second regulating valve

(215)‧‧‧Traffic Detector

(22) ‧‧‧3rd body

(23) ‧‧‧Temperature Detector

(24)‧‧‧ Pressure detector

(3)‧‧‧First regulating valve

(3A)‧‧‧First regulating valve

(4) ‧‧‧Gaseous fuel detector

(5) ‧‧‧ carbon monoxide detector

(7)‧‧‧Connected joints

(8) ‧‧‧ turbocharger

(9) ‧‧‧liquid fuel supply unit

(91)‧‧‧Fourth body

Claims (10)

A gaseous fuel automatic control system for a marine internal combustion engine comprises: a gaseous fuel supply unit: a first pipe body connected to the outlet section; a liquid fuel supply unit: a fourth pipe body connected to the outlet section; an internal combustion engine: an inlet section Connecting a second pipe body and the fourth pipe body, the outlet section is connected to a third pipe body, one segment of the second pipe body is connected to the first pipe body; and a regulating valve is disposed at a section of the first pipe body a gas fuel detector: disposed in a section of the second pipe body and located between the first pipe body and an inlet section of the internal combustion engine, the gaseous fuel detector is configured to detect a gaseous state flowing into the internal combustion engine a quantity of fuel to obtain a gaseous fuel detection signal; a processor: electrically connecting the regulating valve and the gaseous fuel detector respectively, the processor writing a preset value of a gaseous fuel and a regulating valve control program, The regulating valve control program is executable by the processor to control the opening of the regulating valve according to the deviation of the gaseous fuel detecting signal from the preset value of the gaseous fuel. The gas fuel automatic control system for a marine internal combustion engine according to claim 1, wherein a temperature detector and a pressure detector are provided in the internal combustion engine, and the temperature detector is configured to detect a cylinder in the internal combustion engine. Temperature, and a temperature detection signal is obtained; the pressure detector is configured to detect a pressure in the cylinder of the internal combustion engine to obtain a pressure detection signal; the processor is electrically connected to the temperature detector and the pressure a detector, the processor writes a temperature preset value and a pressure preset value, and the regulator valve control program is further executable by the processor: according to the temperature detection signal and the temperature preset value And the deviation of the pressure detection signal from the preset value of the pressure, The opening of the regulating valve is controlled. The gas fuel automatic control system for a marine internal combustion engine according to the first aspect of the invention, wherein the second pipe body comprises a first pipe segment and a second pipe segment; a joint joint includes a body, a hole penetrating the body, and the hole The body is provided with a through hole communicating with the hole, the one end of the hole is connected to the first pipe segment, and the other end is connected to the second pipe segment, and the through hole is connected to the first pipe body at one end. The gas fuel automatic control system for a marine internal combustion engine according to claim 3, wherein the tunnel is tapered from the two ends inwardly. The gas fuel automatic control system for a marine internal combustion engine according to claim 3, wherein the hole wall at one end of the tunnel is provided with an L-shaped groove, and the L-shaped groove includes an upright vertical groove and a lateral groove. An upright groove is formed such that one end is connected to one end of the lateral groove to form a communication, and one end of the vertical groove is formed to be transparent at an edge of the hole; the first pipe segment is provided with a protrusion outside the one end, and the protrusion is operatively disposed In the lateral groove. The gas fuel automatic control system for a marine internal combustion engine according to claim 3, further comprising a conical tube, the first end of the conical tube being disposed in the tunnel, and the opening of the first end of the conical tube The aperture is smaller than the aperture of the aperture. The gas fuel automatic control system for a ship internal combustion engine according to claim 6, wherein the tapered pipe comprises a first tapered pipe segment and a second tapered pipe segment, the first tapered pipe segment and the second tapered portion. The aperture of the pipe segment is gradually tapered from the second end toward the first end, and the second end aperture of the second tapered pipe segment is smaller than the first end aperture of the first tapered pipe segment, along the first tapered pipe segment a shoulder portion is disposed inwardly of the end of the second tapered tubular section, and a second tapered tubular section is partially disposed in the first tapered tubular section. And the landing portion is offset against the shoulder. Gaseous fuel automatic control system for a ship internal combustion engine as described in claim 3 The body is made of a refractory material, and a stainless layer is disposed outside the body. The gas fuel automatic control system of the internal combustion engine of the ship according to claim 1 further includes a turbocharger, the outlet section of the turbocharger is connected to the other end of the first pipe section, and the first pipe section is sequentially a second regulating valve and a flow detecting device are provided. The flow detecting device is configured to detect the air flow in the first pipe segment to obtain a flow signal, and the processor is electrically connected to the second regulating valve and The flow detector is configured to write a flow control program, and the flow control program is configured to determine, according to the flow signal, the opening of the second regulating valve. For example, the gas fuel automatic control system of the marine internal combustion engine described in claim 9 further includes a carbon monoxide detector, and the carbon monoxide detector is disposed at a section of the third pipe body, and the carbon monoxide detector is detectable Detecting a concentration of carbon monoxide in the third tube to obtain a concentration detection signal; the processor is electrically connected to the carbon monoxide detector, and the processor writes a preset value, and the flow control program is further available The processor executes: controlling the opening degree of the second regulating valve according to the degree of deviation between the concentration detecting signal and the preset value of the concentration.