KR20150010425A - Engine - Google Patents

Abstract

The present invention relates to an engine comprising: a first cylinder to burn gas; a second cylinder installed to be separated from the first cylinder, and burns gas; a chamber part connected to the first and second cylinders, and supplies gas to the first and second cylinders; an air inhalation part which opens and closes an inhalation path to supply the gas supplied from the chamber part to the first cylinder; an exhaust part which opens and closes an exhaust path to exhaust the gas from the first cylinder; and a switching part which supplies the gas, supplied to the first cylinder through the inhalation path and discharged through the inhalation path, to the second cylinder. According to the present invention, the engine can reduce maintenance costs of a ship by preventing an increase in fuel consumption in accordance to the propulsion state of the ship.

Description

Engine {ENGINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine for supplying propulsion to a vehicle such as a ship, a vehicle, and an aircraft.

Generally, an engine is a device for supplying a propulsion force to a vehicle (hereinafter referred to as "object") such as a ship, a vehicle, and an aircraft. The thrust is generated by repeating an exhaust stroke that exhausts the gas by the intake stroke accommodating a new gas and the explosive force of the accommodated gas. In order for the intake stroke and the exhaust stroke to be performed, the engine may include a cylinder for accommodating the gas, a piston reciprocating in the cylinder, and an exhaust valve for opening the exhaust port so that gas is discharged out of the cylinder for the intake stroke. The engine generates thrust by repeatedly opening or closing the intake valve and the exhaust valve.

As the number of cylinders increases to realize more improved performance and a compact engine, the use of such a V-type engine in which cylinders are arranged in two rows is increasing.

1 is a block diagram schematically showing an engine according to the prior art.

1, an engine 1 according to the related art includes a gas supply unit 10 for supplying gas, a chamber 20 for moving gas, a first cylinder 30 for providing power, (40), a fuel supply part (50) for supplying fuel to the first cylinder (30) and the second cylinder (40).

The gas supply unit 10 moves an external gas to the chamber 20 side. The gas supply unit 10 provides the gas necessary for the operation of the first cylinder 30 and the second cylinder 40.

The chamber 20 provides a flow path for the gas to move toward the first cylinder 30 and the second cylinder 40 side.

The first cylinder (30) and the second cylinder (40) burn gas and fuel by up and down movement of the cylinders (31, 41). Accordingly, the first cylinder 30 and the second cylinder 40 can provide power for moving the ship.

The fuel supply unit 50 supplies fuel to the first cylinder 30 and the second cylinder 40.

In the engine 1 according to the related art, the first cylinder 30 and the second cylinder 40 share the entire load by operating the propulsive load depending on the propulsion state of the object. The propulsive load refers to a load applied to the entire engine as the propulsion state of the object is changed, such as when the object is started, at a low speed, at a high speed, or the like.

Therefore, the engine 1 according to the prior art always operates by sharing the entire load applied to the engine by the first cylinder 30 and the second cylinder 40, regardless of the propulsion state of the object. Therefore, the engine 1 according to the related art operates the propulsion load by the first cylinder 30 and the second cylinder 40 in a shared manner even when the propulsion load is low, do.

Accordingly, when the propulsion load is low according to the propulsion state of the object, the engine 1 according to the prior art has a low load imposed on each of the first cylinder 30 and the second cylinder 40 The combustion efficiency is lowered. Therefore, the conventional engine 1 has a problem in that the overall performance of the engine 1 is deteriorated according to the propulsion state of the object.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above problems, and an object of the present invention is to provide an engine for preventing combustion efficiency of a cylinder from being lowered according to a propelling load.

In order to solve the above-described problems, the present invention can include the following configuration.

An engine according to the present invention includes: a first cylinder for burning a gas; A second cylinder that is installed to be spaced from the first cylinder and in which the gas is burned; A chamber connected to the first cylinder and the second cylinder, respectively, for supplying gas to the first cylinder and the second cylinder; An intake part for opening and closing a suction passage through which gas supplied from the chamber part is supplied to the first cylinder; An exhaust unit for opening and closing an exhaust passage for exhausting gas from the first cylinder; And a switching unit for switching the gas supplied to the first cylinder through the suction passage to be discharged to the second cylinder through the suction passage when the propulsive load according to the propulsion state of the object is below the reference load .

According to the engine of the present invention, the chamber portion may include an inlet chamber connected to the gas supply portion and through which gas supplied from the gas supply portion flows; A supply chamber connected to the second cylinder for supplying gas to the second cylinder; A connecting chamber located between the inlet chamber and the supply chamber for connection to the first cylinder; A first opening / closing mechanism for passing a gas moving from the inlet chamber to the connection chamber and blocking the gas moving from the connection chamber to the inlet chamber; And a second opening and closing mechanism for passing a gas moving from the connection chamber to the supply chamber and shutting off the gas moving from the supply chamber to the connection chamber.

According to the engine of the present invention, the switching unit includes a first intake plunger coupled to the intake unit; A second intake plunger disposed to be spaced apart from the first intake plunger; An intake cam for moving the second intake plunger; And switching the working fluid supply path so that the working fluid is supplied between the first intake plunger and the second intake plunger to maintain the intake path in an opened state when the propulsive load according to the propulsion state of the object is below the reference load And a switching member to which the switching member is connected.

According to the engine according to the present invention, the switching portion includes a first exhaust plunger coupled with the exhaust portion, and when the propulsive load according to the propulsion state of the object exceeds the reference load, the first intake plunger And the working fluid supply path is switched so that the intake passage is closed and the first exhaust plunger is raised by the working fluid to open the exhaust passage.

According to the present invention, the following effects can be achieved.

The present invention improves the performance of the entire engine by improving the combustion efficiency of the cylinder in accordance with the propelling load.

1 is a block diagram schematically showing an engine according to the prior art,
2 is a block diagram schematically showing an engine according to the present invention,
3 is a cross-sectional view schematically showing an engine according to the present invention,
Fig. 4 is a view showing the profile of the intake portion, the exhaust portion and the cylinder when the propelling load exceeds the reference load,
5 is a cross-sectional view for explaining the operation of the switching portion when the propulsion load exceeds the reference load,
6 is a view showing profiles of an intake portion, an exhaust portion, and a cylinder when the propulsive load is equal to or less than a reference load,
FIG. 7 is a sectional view for explaining the operation of the first cylinder when the propulsive load in the engine of FIG. 3 is lower than the reference load,
8 and 9 are sectional views for explaining the operation of the switching portion when the propulsive load is equal to or lower than the reference load.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item, and the third item" means a combination of all items that can be presented from two or more of the first item, the second item, or the third item do.

Hereinafter, the engine according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a block diagram schematically showing an engine according to the present invention, Fig. 3 is a cross-sectional view schematically showing an engine according to the present invention, Fig. 4 is a cross- 5 is a cross-sectional view for explaining the operation of the switching portion when the propelling load exceeds the reference load, and Fig. 6 is a sectional view for explaining the operation of the intake portion, the exhaust portion, the cylinder FIG. 7 is a sectional view for explaining the operation of the first cylinder when the propulsive load is below the reference load in the engine of FIG. 3, and FIGS. 8 and 9 show the operation Fig.

2 to 9, the engine 100 according to the present invention includes a chamber 110 for supplying gas, a first cylinder 120 for burning gas, a second cylinder 120 for separating the first cylinder 120 from the first cylinder 120, An intake unit 150 for opening the intake passage 151, an exhaust unit 160 for opening and closing the exhaust passage 151, and a second cylinder 130 installed in the first cylinder 120, And a switching unit 180 for supplying gas to the second cylinder 130.

Before the engine 100 is started, the engine 100 is driven by a mixture of the intake stroke, the gas and the fuel supplied to the first cylinder 120 and the second cylinder 130 to the first cylinder 120, And a compression stroke that is compressed by the second cylinder 140, an explosion stroke in which the mixture is exploded by a flame generated from an ignition device (not shown), and an exhaust gas As the stroke is continuously performed, the thrust can be provided to the object.

The chamber 110 supplies gas to the first cylinder liner 120 and the second cylinder 130. The switching unit 180 supplies the gas supplied to the first cylinder 120 to the second cylinder 130 when the propelling load corresponding to the propulsion state of the object is below the reference load. Accordingly, the first cylinder 120 may be used as a supercharging cylinder for supplying gas or a combustion cylinder for burning gas according to a propelling load depending on the propulsion state of the object.

Accordingly, the engine 100 according to the present invention can use the first cylinder 120 as the boost cylinder or the combustion cylinder according to the propelling load depending on the propulsion state of the object. Accordingly, when the thrust load is below the reference load, the engine 100 according to the present invention increases the load applied to the second cylinder 130 as the first cylinder 120 is used as the boost cylinder . Therefore, the engine 100 according to the present invention can improve the combustion efficiency of the second cylinder 130 even when the propelling load is equal to or lower than the reference load, thereby improving the overall performance of the engine 100 .

Hereinafter, the drawings related to the chamber 110, the first cylinder 120, the second cylinder 130, the intake unit 150, the exhaust unit 160, and the switching unit 180 Will be described in detail.

Referring to FIGS. 2 and 3, the chamber part 110 supplies gas to the first cylinder 120 and the second cylinder 130. To this end, the chamber part 110 is connected to the first cylinder 120 and the second cylinder 130, respectively. The chamber part 110 can supply gas to the first cylinder 120 and the second cylinder 130 so that a mixed mixture of fuel and gas used in the intake stroke and the explosion stroke can be formed have. The chamber section 110 includes an inlet chamber 111, a supply chamber 112, a connection chamber 113, a first opening and closing mechanism 114, and a second opening and closing mechanism 115.

The inlet chamber 111 provides a passage through which the gas supplied from the gas supply unit 140 moves to the connection chamber 113. The inlet chamber 111 is connected to the supply chamber 112 by the connection chamber 113. Accordingly, the inflow chamber 111 can supply the gas supplied from the gas supply unit 140 to the supply chamber 112 and the connection chamber 113. For example, the gas supply unit 140 may be a turbocharger.

The supply chamber 112 is connected to the second cylinder 130. The supply chamber 112 is connected to the inlet chamber 111 by the connection chamber 113. Accordingly, the supply chamber 112 can supply the gas supplied through the inlet chamber 111 and the connection chamber 113 to the second cylinder 130.

The connection chamber 113 connects the inlet chamber 111 and the supply chamber 112 between the inlet chamber 111 and the supply chamber 112. The connection chamber 113 is connected to the first cylinder 120. Accordingly, the connection chamber 113 can supply the gas supplied from the gas supply unit 140 to the first cylinder 120 through the inlet chamber 111. [0035]

The first opening and closing mechanism 114 is located at a position where the inflow chamber 111 and the connection chamber 113 are connected to each other. The first opening and closing mechanism 114 allows the gas moving from the inlet chamber 111 to the connecting chamber 113 to pass and the gas moving from the connecting chamber 113 to the inlet chamber 111 is blocked . The first opening and closing mechanism 114 may be a non-return valve.

The second opening and closing mechanism 115 is located at a position where the connection chamber 113 and the supply chamber 112 are connected to each other. The second opening and closing mechanism 115 allows the gas moving from the connection chamber 113 to the supply chamber 112 to pass therethrough and blocks the gas moving from the supply chamber 112 to the connection chamber 113 . The second opening and closing mechanism 115 may be a flap valve.

The first opening and closing mechanism 114 and the second opening and closing mechanism 115 allow the gas to be supplied from the inlet chamber 111 toward the supply chamber 112. Therefore, the engine 100 according to the present invention can reduce the loss of gas supplied from the first cylinder 120 to the second cylinder 130 when the first cylinder 120 functions as the boost cylinder Can be reduced. Accordingly, the engine 100 according to the present invention can prevent the amount of gas supplied to the second cylinder 130 from being reduced. Accordingly, the engine 100 according to the present invention can improve the efficiency of the first cylinder 120 when the first cylinder 120 functions as the supercharging cylinder.

The first cylinder 120 is vertically reciprocated by a cam (not shown) coupled to the camshaft. The first cylinder 120 can provide thrust to the object by performing the strokes using gas and fuel. The first cylinder 120 may be used as the supercharging cylinder or the combustion cylinder according to the propelling load.

Referring to FIG. 4, when the propelling load exceeds the reference load, the first cylinder 120 is used as the combustion cylinder. In this case, the first cylinder 120 can reciprocate up and down by the cam to perform the explosion stroke, the exhaust stroke, the intake stroke, and the compression stroke. Here, the intake unit 150 opens the intake passage 150 to supply the gas to be used for the compression stroke and the explosion stroke in the intake stroke. Also, the exhaust unit 160 opens the exhaust passage 161 to exhaust the mixed gas in the exhaust stroke.

Referring to FIG. 6, when the thrust load is equal to or less than the reference load, the first cylinder 120 is used as the boost cylinder. In this case, the first cylinder 120 can reciprocate up and down by the cam, thereby performing the expansion stroke, the ejection stroke, the intake stroke, and the compression stroke. Here, the intake unit 150 may be configured such that the gas exhausted from the first cylinder 120 and supplied to the second cylinder 130 in the discharge stroke or the gas supplied from the gas supply unit 140 in the intake stroke The suction passage 151 is kept open to be supplied to the first cylinder 120. In addition, the exhaust unit 160 is maintained in a state in which the exhaust passage 161 is closed so as not to exhaust the gas.

Here, the expansion stroke may be performed by not supplying fuel so that explosion of fuel and gas is not performed by the first cylinder 120 when the propulsion load is equal to or less than the reference load.

Further, the discharge stroke can be achieved by discharging the gas expanded in the expansion stroke toward the second cylinder 130 by moving the first cylinder 120 upward.

The plurality of first cylinders 120 may be disposed. In this case, the first cylinders 120 and 120 'are connected to the connection chamber 113, respectively.

The second cylinder 130 is reciprocally moved up and down by a cam (not shown) coupled to the camshaft, thereby performing the explosion stroke, the exhaust stroke, the intake stroke, and the compression stroke. The second cylinder 120 can provide thrust to the object by performing the strokes using gas and fuel. The second cylinder 130 performs the explosion stroke, the exhaust stroke, the intake stroke, and the compression stroke using the gas supplied from the first cylinder 120 when the propelling load is equal to or less than the reference load can do. Also, the second cylinders 130 may be disposed in a plurality of positions. In this case, the second cylinders 130 and 130 'are connected to the supply chamber 112. The intake unit 150 is configured such that the gas supplied from the chamber unit 110 is supplied to the first cylinder 120, The suction passage 151 is opened and closed. For example, when the propelling load exceeds the reference load, the intake unit 150 opens the intake passage 151 so that gas is supplied to the first cylinder 120. Further, the intake unit 150 closes the intake passage 151 so that the mixed gas is discharged to the discharge passage 161 side.

Here, when the propulsive load is equal to or less than the reference load, the intake unit 150 is maintained in a state in which the intake passage 151 is opened.

The suction passage 151 provides a passage through which gas supplied from the gas supply unit 140 is sucked into the first cylinder 120. The suction passage 151 may be used as a passage through which the gas sucked from the first cylinder 120 is discharged to the second cylinder 130 when the propelling load is equal to or lower than the reference load. The intake passage 151 is connected to the connection chamber 113 and the first cylinder 120. The exhaust unit 160 includes a discharge passage for discharging gas from the first cylinder 120, (161). For example, when the propelling load is equal to or less than the reference load, the exhaust unit 160 closes the exhaust passage 161 so that gas is not discharged to the exhaust passage 161 side. Also, the exhaust unit 160 opens the exhaust passage 161 to discharge the mixed gas toward the exhaust passage 161 side.

Here, when the thrust load is equal to or less than the reference load, the exhaust unit 160 is maintained in a state in which the exhaust passage 161 is closed so that gas is not exhausted.

The exhaust passage 161 provides a passage through which the mixed gas is discharged to the outside through the exhaust pipe 170. To this end, the discharge passage 161 is connected to the first cylinder 120 and the exhaust pipe 170.

Here, the exhaust pipe 170 discharges the mixed gas discharged from the first cylinder 120 and the second cylinder 130 to the outside. The exhaust pipe 170 may discharge the mixed gas to the gas supply unit 140 side. In this case, the gas supply unit 140 may improve the efficiency of the engine 100 by supplying a part of the mixed gas to the chamber 110.

The switching unit 180 switches the moving direction of the working fluid so that the intake unit 150 and the exhaust unit 160 open and close the suction passage 151 and the discharge passage 161 in accordance with the driving load .

Accordingly, the engine 100 according to the present invention can switch the operation of the intake unit 150 and the exhaust unit 160 by switching the direction of movement of the working fluid. Accordingly, the engine 100 according to the present invention can cause the first cylinder 120 to perform the function of the supercharging cylinder or the combustion cylinder in accordance with the propelling load. Therefore, the engine 100 according to the present invention can use the first cylinder 120 as the supercharge cylinder even when the propelling load is equal to or lower than the reference load. Therefore, the first cylinder 120 and the second cylinder 120 130 can be improved.

The switching unit 180 includes an intake plunger main body 181, a first intake plunger 182, a second intake plunger 183, an intake cam 184, a switching member 185 and a first exhaust plunger 186. [ .

The intake plunger main body 181 engages the first intake plunger 182 and the second intake plunger 183 such that the first intake plunger 182 and the second intake plunger 183 are interlocked.

The first intake plunger 182 is coupled to the intake plunger main body 181 to interlock with the second intake plunger 183. The first intake plunger 182 moves the intake unit 150 in accordance with the driving load so that the intake unit 150 opens and closes the intake passage 151. For example, when the propelling load exceeds the reference load, the first intake plunger 182 can move the intake unit 150 by moving the second intake plunger 183.

The first intake plunger 182 is configured such that the intake unit 150 is moved to the intake passage 151 by the working fluid irrespective of the movement of the second intake plunger 183, So as to be fixed in an opened state. The first intake plunger 182 is supported by the second intake plunger 183 moving upward so that the intake unit 150 is fixed in a state in which the intake passage 151 is opened . In this case, the working fluid can move to the working fluid supply line (A).

The second intake plunger 183 is coupled to the intake plunger main body 181 to interlock with the first intake plunger 182. The second intake plunger 183 reciprocates up and down according to the rotation of the intake cam 184. For example, when the propulsive load exceeds the reference load, the second intake plunger 183 can move the first intake plunger 182. Further, when the propulsive load is equal to or less than the reference load, the second intake plunger 183 may move the first intake plunger 182 upward.

The intake cam 184 rotates about the cam axis to cause the second intake plunger 183 to reciprocate up and down. The switching member 185 switches the moving direction of the working fluid according to the propelling state. To this end, the switching member 185 is coupled to the working fluid supply line A to which the working fluid is supplied. For example, when the thrust load exceeds the reference load, the switching member 185 switches the working fluid supply line A so that the working fuel is supplied to the first exhaust plunger 186 side. In this case, the first exhaust plunger 186 is moved upward by the working fluid, so that the exhaust unit 160 opens the exhaust line 161.

In addition, when the propulsive load is equal to or lower than the reference load, the switching member 185 is connected to the working fluid supply line A (A) so that the working fuel is supplied between the first intake plunger 182 and the second intake plunger 183 ). Accordingly, the first intake plunger 161 is fixed in a state of being moved upward, regardless of the motion of the second intake plunger 183, so that the intake unit 150 opens the intake passage 151 State.

The first exhaust plunger 186 is coupled to the exhaust plunger body 187. The first exhaust plunger 186 can move the exhaust unit 160 as the switching member 185 switches the working fluid supply line A. [ For example, when the propelling load exceeds the reference load, the first exhaust plunger 186 is moved upward by the working fluid so that the exhaust unit 160 opens the exhaust passage 161 .

The first exhaust plunger 186 is moved downward as the working fluid is supplied to the first plunger 182 and the second plunger 183 side when the propelling load is equal to or less than the reference load, So that the discharge unit 160 can be maintained in a state in which the discharge passage 161 is closed.

 Accordingly, the engine 100 according to the present invention can switch the working fluid supply line A in accordance with the pushing load, so that the first cylinder 120 can have the function of the supercharging cylinder or the combustion cylinder have. Therefore, the engine 100 according to the present invention is capable of reducing the load on the first cylinder 120 to the boost cylinder, as compared with the case in which the first cylinder 120 is not operated according to the thrust load being less than the reference load. It is possible not only to improve the efficiency of the first cylinder 120 and the second cylinder 130 but also to improve the operating efficiency of the entire engine.

The engine 100 according to the present invention may include a second exhaust plunger 188, and an exhaust cam 189.

The second exhaust plunger 188 is coupled to the exhaust plunger body 187 to be spaced apart from the first exhaust plunger 186. The second exhaust plunger 188 reciprocates up and down according to the rotation of the exhaust cam 189.

The exhaust cam 189 rotates about the cam shaft to reciprocate the second exhaust plunger 188 up and down.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Will be clear to those who have knowledge of.

100: engine 110: chamber part
111: inlet chamber 112: supply chamber
113: connection chamber 114: first opening and closing mechanism
115: second opening / closing mechanism 120: first cylinder
130: second cylinder 140: intake part
141: Suction passage 150:
151: exhaust passage 160:
161: first intake plunger 162: second intake plunger
163: intake cam 164: switching member
165: first exhaust plunger 166: second exhaust plunger
167: exhaust cam 170:

Claims (4)

A first cylinder for burning gas;
A second cylinder that is installed to be spaced from the first cylinder and in which the gas is burned;
A chamber connected to the first cylinder and the second cylinder, respectively, for supplying gas to the first cylinder and the second cylinder;
An intake part for opening and closing a suction passage through which gas supplied from the chamber part is supplied to the first cylinder;
An exhaust unit for opening and closing an exhaust passage for exhausting gas from the first cylinder; And
And a switching unit for switching the gas supplied to the first cylinder through the suction passage to be discharged to the second cylinder through the suction passage when the propulsive load according to the propulsion state of the object is below the reference load Engine. 2. The apparatus of claim 1, wherein the chamber portion
An inflow chamber connected to the gas supply unit and through which gas supplied from the gas supply unit flows;
A supply chamber connected to the second cylinder for supplying gas to the second cylinder;
A connecting chamber located between the inlet chamber and the supply chamber for connection to the first cylinder;
A first opening / closing mechanism for passing a gas moving from the inlet chamber to the connection chamber and blocking the gas moving from the connection chamber to the inlet chamber; And
And a second opening and closing mechanism for passing a gas moving from the connecting chamber to the supply chamber and shutting off the gas moving from the supply chamber to the connecting chamber. The apparatus of claim 1, wherein the switching unit
A first intake plunger coupled to the intake unit;
A second intake plunger disposed to be spaced apart from the first intake plunger;
An intake cam for moving the second intake plunger; And
Switching the working fluid supply path so that a working fluid is supplied between the first intake plunger and the second intake plunger to maintain the intake path in an opened state when the propelling load corresponding to the propulsion state of the object is below the reference load And a switching member. The method of claim 3,
The switching unit
And a first exhaust plunger coupled to the exhaust portion,
When the propulsive load according to the propulsion state of the object exceeds the reference load, the first intake plunger is lowered to close the intake passage and the first exhaust plunger is raised by the working fluid to open the exhaust passage. And switches the working fluid supply path.

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