Hydraulic oil supply device for internal combustion engine and ship having the same

Abstract

The present invention provides a hydraulic oil supply device for an internal combustion engine and a ship having the same. The hydraulic oil supply device includes a common rail pipe, a high-pressure oil pump, a fuel tank, an electric pump and a mechanical pump; the internal volume of the common rail pipe is connected to the first pressure storage chamber of the fuel injector; the second pressure storage chamber of the high-pressure oil pump is connected to the internal volume of the common rail pipe, and the high-pressure oil pump is used to increase the pressure of the fuel entering from its second oil inlet and then deliver it to the second pressure storage chamber; the internal space of the fuel tank is provided with fuel, and the internal space of the fuel tank is connected to the first oil return port of the fuel injector, the second oil return port of the high-pressure oil pump, and the third oil return port of the common rail pipe through an oil return pipeline; the first pump outlet of the electric pump is connected to the second oil inlet, and the first pump inlet of the electric pump is connected to the internal space of the fuel tank; the second pump outlet of the mechanical pump is connected to the second oil inlet, and the second pump inlet of the mechanical pump is connected to the internal space of the fuel tank. As a result, the common rail pressure can be established in the common rail pipe more quickly, and the internal combustion engine starts quickly.

Description

Technical Field

[0001] The present invention generally relates to the field of internal combustion engines, and more particularly to a hydraulic oil supply device of an internal combustion engine and a ship having the same. Background Art

[0002] Nowadays, after the design of the mechanical fuel system of marine diesel engines is finalized, the injection pressure and injection timing are fixed and cannot be flexibly adjusted according to the changes in the diesel engine working conditions. The high-pressure common rail fuel injection system is the most advanced fuel injection system currently. It can flexibly control the fuel injection pressure and injection timing, thereby achieving the optimal combination of engine fuel consumption and emissions. In the high-pressure common rail fuel injection system, the high-pressure common rail pipe is the main component of the high-pressure common rail fuel injection system, which stores and delivers high-pressure fuel with stable pressure to the injector.

[0003] Since the fuel injection volume of a high-pressure common rail diesel engine is small in a single cycle, the pressure fluctuation in the common rail pipe is small, and this pressure fluctuation can be absorbed by the internal cavity of the common rail pipe. In this way, the interference caused by the pressure fluctuation in the common rail pipe on the injection of adjacent cylinders can be ignored, so the volume of the common rail pipe of the diesel engine can be made very small.

[0004] The fuel injection volume of a high-power marine diesel engine is dozens or even hundreds of times that of a high-pressure common rail diesel engine for a vehicle. Therefore, a single injection of a high-power marine diesel engine will cause a large pressure fluctuation in the common rail pipe. After the pressure fluctuation is transmitted through the high-pressure oil pipe, its amplitude can still reach ±250bar or even higher. Nowadays, in order to reduce the amplitude of the above pressure fluctuation of a high-power marine diesel engine, the internal cavity of the common rail pipe is set to be very large to stabilize the pressure fluctuation at the inlet end of the injector, and even a first pressure storage chamber is set at the head of the injector to stabilize the injection pressure.

[0005] like Figure 1 , which is a schematic diagram of a hydraulic oil supply device of an existing high-power marine diesel engine. The hydraulic oil supply device of a high-power marine diesel engine includes an injector 10, a common rail pipe 20, a high-pressure oil pump 30, an oil tank 40, an oil return pipeline 50, a mechanical pump 70, a relief valve 21, a pipeline pressure sensor 22, an electronic control unit 24, a temperature sensor 25, a safety valve 27, a rail pressure sensor 29, a fine filter 31, a coarse filter 32, etc.

[0006] When the existing high-power marine diesel engine is started, the crankshaft speed of the diesel engine is driven to about 100rpm by the starter motor. At this time, the speed of the mechanical pump is also about 100rmp. The volumetric efficiency of the mechanical pump at this speed is low, the fuel supply pressure is low, and the flow rate is small. The fuel needs to overcome the opening pressure of the one-way valve in front of the oil metering valve on the high-pressure oil pump (the opening pressure is about 1.3~1.7bar) to deliver the fuel to the common rail pipe and the high-pressure oil pipe. Then the pressure can be built in the common rail pipe, and then the injector can spray and the engine can be successfully started.

[0007] 1. When the hydraulic oil supply device of the existing high-power marine diesel engine starts the diesel engine, the oil supply pressure of the mechanical pump 70 is very low, and the high-pressure volume of the high-pressure common rail system (the internal cavity of the common rail pipe, the first pressure storage chamber of the injector head, the second pressure storage chamber of the high-pressure oil pump, and the high-pressure oil pipe) cannot be quickly filled, so the common rail pressure cannot be quickly established, resulting in a long start time for the diesel engine or multiple starts are required to start successfully.

[0008] 2. The overflow valve 21 of the hydraulic oil supply device of the existing high-power marine diesel engine includes an orifice plate and a one-way valve. In this way, the fuel pressure of the pipeline (fuel inlet pipeline) between the mechanical pump 70 and the high-pressure oil pump 30 is adjusted by adjusting the aperture of the orifice plate. The overflow bypass of the excess fuel in the fuel inlet pipeline is realized. The combination of the orifice plate and the one-way valve cannot keep the pressure of the fuel inlet pipeline unchanged under all working conditions. The pressure of the fuel inlet pipeline will increase with the increase of the speed of the diesel engine, and the overflow flow of the overflow valve 21 will gradually increase. The pressure of the fuel inlet pipeline will also be "held back" synchronously (the maximum pressure is high). The fuel inlet pressure of the high-pressure oil pump (the pressure of the fuel in the fuel inlet pipeline) is stable, and the oil metering valve inside the high-pressure oil pump can linearly adjust the opening to accurately control the amount of oil entering the high-pressure oil pump. If the oil inlet pressure is unstable or the pressure fluctuates too much, it will cause the high-pressure oil pump oil metering valve to be difficult to accurately control the oil inlet amount (the opening of the oil metering valve needs to be continuously adjusted when the pressure changes), which will affect the precise control of the common rail pressure in the internal cavity of the common rail pipe, and may eventually lead to unstable injection pressure and cause diesel engine wandering (unstable speed).

[0009] 3. The existing low-pressure fuel pipeline is complex, the positions of pipeline pressure sensors and temperature sensors are scattered, the position of the overflow valve is arranged randomly, the system layout is not compact, and the system reliability and maintainability are poor.

[0010] Therefore, it is necessary to provide a hydraulic oil supply device for an internal combustion engine and a ship having the same, so as to at least partially solve the above-mentioned problems. Summary of the invention

[0011] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the specific embodiments. The summary of the invention does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0012] To at least partially solve the above technical problems, according to one aspect of the present invention, a hydraulic oil supply device for an internal combustion engine is provided, the internal combustion engine comprising an injector for spraying atomized fuel into a combustion chamber of the internal combustion engine, comprising: a common rail pipe, the inner volume of the common rail pipe is connected to a first pressure accumulation chamber of the injector; a high-pressure oil pump, the second pressure accumulation chamber of the high-pressure oil pump is connected to the inner volume of the common rail pipe, the high-pressure oil pump is used to increase the pressure of the fuel entering from its second oil inlet and then deliver it to the second pressure accumulation chamber; a fuel tank, the inner space of the fuel tank is provided with fuel, the inner space of the fuel tank is connected to the first oil return port of the injector, the second oil return port of the high-pressure oil pump, and the third oil return port of the common rail pipe through an oil return pipe; an electric pump, the first pump outlet of the electric pump is connected to the second oil inlet, and the first pump inlet of the electric pump is connected to the inner space of the fuel tank; a mechanical pump, the second pump outlet of the mechanical pump is connected to the second oil inlet, and the second pump inlet of the mechanical pump is connected to the inner space of the fuel tank.

[0013] According to the hydraulic oil supply device of the internal combustion engine of the present invention, when starting the internal combustion engine, the electric pump can be started to pre-fill the oil through the electric pump. At this time, the mechanical pump is in a stopped state, and the electric pump delivers the fuel in the fuel tank to the high-pressure oil pump. The high-pressure oil pump increases the pressure of the fuel and delivers it to the second pressure accumulation chamber. In this way, when starting the internal combustion engine, the fuel is delivered to the high-pressure oil pump through the electric pump. Since the oil supply pressure of the electric pump is large, the fuel can quickly fill the second pressure accumulation chamber, the first pressure accumulation chamber, the internal cavity of the common rail pipe, and the high-pressure oil pipe. The common rail pressure can be established in the common rail pipe quickly, and the internal combustion engine starts quickly, which is suitable for the starting requirements of a high-power emergency power station including an internal combustion engine.

[0014] Optionally, when the hydraulic oil supply device is started, the electric pump is started to deliver fuel to the first pressure accumulation chamber, the second pressure accumulation chamber, and the common rail pipe.

[0015] Optionally, the fuel pressure in the second pressure accumulation chamber is 6 bar to 10 bar.

[0016] Optionally, when the rotation speed of the crankshaft of the internal combustion engine is ≥ 40% of the rated rotation speed, the electric pump stops working and the mechanical pump starts working.

[0017] Optionally, the hydraulic oil supply device further comprises a first one-way valve, a first valve inlet of the first one-way valve is connected to a first pump outlet of the electric pump, and a first valve outlet of the first one-way valve is connected to a second oil inlet.

[0018] Optionally, the hydraulic oil supply device further comprises a second one-way valve, a second valve inlet of the second one-way valve is connected to a second pump outlet of the mechanical pump, and a second valve outlet of the second one-way valve is connected to the second oil inlet.

[0019] Optionally, the hydraulic oil supply device further comprises an overflow valve, an overflow inlet of the overflow valve is connected to the second oil inlet, and an overflow outlet of the overflow valve is connected to the inner space of the oil tank through an oil return pipeline.

[0020] Optionally, the hydraulic oil supply device also includes a temperature sensor, a pipeline pressure sensor, and a connecting module. The temperature sensor, the pipeline pressure sensor, and the overflow valve are all arranged on the connecting module. The overflow inlet is connected to the second pressure accumulation chamber through the internal channel of the connecting module. The temperature sensor and the pipeline pressure sensor are used to measure the temperature and pressure of the fuel in the internal channel of the module.

[0021] Optionally, the hydraulic oil supply device also includes a coarse filter and a fine filter. The coarse filter is arranged on a tank pipe connected to the oil tank outlet of the oil tank to filter the fuel flowing out of the oil tank, and the fine filter is arranged on an oil inlet pipe connected to the second oil inlet to filter the fuel flowing out of the electric pump or the mechanical pump.

[0022] The present invention also provides a ship, comprising: an internal combustion engine; and the aforementioned hydraulic oil supply device.

[0023] According to the ship of the present invention, the ship includes an internal combustion engine and the hydraulic oil supply device of the internal combustion engine. When starting the internal combustion engine, the electric pump can be started to pre-fill the oil through the electric pump. At this time, the mechanical pump is in a stopped state. The electric pump delivers the fuel in the fuel tank to the high-pressure oil pump. The high-pressure oil pump increases the pressure of the fuel and delivers it to the second pressure accumulation chamber. In this way, when starting the internal combustion engine, the fuel is delivered to the high-pressure oil pump through the electric pump. Since the oil supply pressure of the electric pump is large, the fuel can quickly fill the second pressure accumulation chamber, the first pressure accumulation chamber, the internal cavity of the common rail pipe, and the high-pressure oil pipe. The common rail pressure can be established in the common rail pipe quickly, and the internal combustion engine starts quickly, which is suitable for the starting requirements of a high-power emergency power station including an internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the advantages of the present invention more easily understood, the present invention briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present invention and therefore should not be considered as limiting the scope of protection thereof, and the present invention is described and explained with additional characteristics and details through the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of a hydraulic oil supply device of an existing high-power marine diesel engine;

[0026] Figure 2A schematic diagram of a hydraulic oil supply device for a diesel engine according to a first preferred embodiment of the present invention; and

[0027] Figure 3 for Figure 2 Schematic diagram of the connection module and overflow valve of the hydraulic oil supply device of a diesel engine connected together.

[0028] Description of reference numerals:

[0029] 10: fuel injector 20: common rail pipe;

[0030] 21: Relief valve 22: Pipeline pressure sensor

[0031] 24: Electronic control unit 25: Temperature sensor

[0032] 27: Safety valve 29: Rail pressure sensor

[0033] 30: High pressure oil pump 31: Fine filter

[0034] 32: Primary filter 40: Fuel tank

[0035] 50: Oil return pipe 70: Mechanical pump

[0036] 110: Injector 111: First oil return port

[0037] 112: First pressure accumulator chamber 113: First oil inlet

[0038] 120: Common rail pipe 121: The third oil outlet

[0039] 122: Internal cavity 123: Third oil inlet

[0040] 124: The third oil return port 130: High-pressure oil pump

[0041] 131: Second oil outlet 132: Second pressure storage chamber

[0042] 133: Second oil inlet 134: Second oil return

[0043] 140: Oil tank 141: Oil return port

[0044] 142: Oil tank outlet 150: Oil return pipe

[0045] 160: Electric pump 170: Mechanical pump

[0046] 180: first one-way valve 190: second one-way valve

[0047] 210: Overflow valve 211: Overflow inlet

[0048] 212: Overflow oil return port 220: Pipeline pressure sensor

[0049] 230: Connection module 231: Temperature interface

[0050] 232: Pressure port 233: Overflow port

[0051] 234: First liquid inlet 235: Second liquid inlet

[0052] 236: Module oil outlet 240: Electronic control unit

[0053] 250: Temperature sensor 260: Fuel tank pipe

[0054] 270: Safety valve 280: Oil inlet pipe

[0055] 290: Rail pressure sensor 310: Fine filter

[0056] 320: Coarse filter 330: Stop valve DETAILED DESCRIPTION

[0057] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

[0058] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0059] The present invention provides a hydraulic oil supply device for an internal combustion engine. The hydraulic oil supply device is used to spray atomized fuel into a combustion chamber of the internal combustion engine for operation of the internal combustion engine. The internal combustion engine may be a diesel engine.

[0060] In this embodiment, if Figure 2As shown, the hydraulic oil supply device includes an injector 110 and an oil tank 140. The injector 110 includes a first pressure accumulator chamber 112 located at the head of the injector 110, an injection port located at the bottom of the injector 110, a first oil inlet 113 connected to the first pressure accumulator chamber 112, and a first oil return port 111 located at the side of the injector 110. The first pressure accumulator chamber 112 is used to store high-pressure fuel. The first pressure accumulator chamber 112, the injection port, and the first oil return port 111 are connected through the injector internal channel of the injector 110. The first oil inlet 113 is connected to the third oil outlet 121 of the common rail pipe 120 described later through a high-pressure pipeline, so that the fuel in the internal cavity 122 of the common rail pipe 120 can enter the first pressure accumulator chamber 112 of the injector 110. The injection port is located in the combustion chamber of the internal combustion engine. In this way, the high-pressure fuel in the first pressure accumulation chamber 112 flows to the fuel injection port through the internal channel of the fuel injector, and then the fuel injection port sprays the fuel in a mist form into the combustion chamber of the internal combustion engine.

[0061] The fuel tank 140 includes an internal space, a fuel tank return port 141 communicating with the internal space, and a fuel tank outlet port 142 communicating with the internal space. Fuel is provided in the internal space of the fuel tank 140. The first fuel return port 111 of the fuel injector 110 is communicated with the fuel tank return port 141 of the fuel tank 140 through the fuel return pipe 150. Thus, the fuel in the fuel injector 110 can flow to the internal space of the fuel tank 140 through the fuel return pipe 150. The fuel tank outlet port 142 of the fuel tank 140 is communicated with the fuel tank pipe 260.

[0062] In this embodiment, the hydraulic oil supply device further includes a common rail pipe 120. The common rail pipe 120 may be a high-pressure common rail pipe. The common rail pipe 120 includes an internal cavity 122, and a third oil inlet 123, a third oil outlet 121, and a third oil return port 124 that are all connected to the internal cavity 122. The third oil inlet 123 is connected to a second oil outlet 131 of a high-pressure oil pump 130 described later through a high-pressure pipeline, so that the fuel in the second pressure accumulation chamber 132 of the high-pressure oil pump 130 can enter the internal cavity 122 of the common rail pipe 120. The third oil outlet 121 is connected to the first oil inlet 113 of the injector 110 through a high-pressure pipeline. The third oil return port 124 is connected to the oil return pipeline 150, so that the fuel in the internal cavity 122 of the common rail pipe 120 can flow to the internal space of the oil tank 140 through the oil return pipeline 150.

[0063] Preferably, the hydraulic supply device further includes a safety valve 270. The liquid inlet of the safety valve 270 is connected to the third oil return port 124 of the common rail pipe 120. The liquid outlet of the safety valve 270 is connected to the oil return pipeline 150, so that the pressure of the fuel in the common rail pipe 120 can be prevented from being greater than a preset value. The preset value is the rated pressure of the safety valve 270.

[0064] In this embodiment, the hydraulic oil supply device further includes a high-pressure oil pump 130. The high-pressure oil pump 130 includes a second pressure storage chamber 132, a second oil inlet 133, a second oil outlet 131, and a second oil return port 134. The second pressure storage chamber 132 is connected to the second oil return port 134 and the second oil outlet 131 respectively. The second oil return port 134 is connected to the oil return pipe 150, so that the fuel in the second pressure storage chamber 132 of the high-pressure oil pump 130 can flow to the inner space of the oil tank 140 through the oil return pipe 150. The second oil outlet 131 is connected to the third oil inlet 123 of the common rail pipe 120 through the high-pressure pipe. The second oil inlet 133 is connected to the oil inlet pipe 280, so that the fuel can be delivered to the high-pressure oil pump 130 through the oil inlet pipe 280. Then the high-pressure oil pump 130 increases the pressure of the fuel and delivers it to the second pressure storage chamber 132.

[0065] Preferably, the high-pressure oil pump 130 can increase the pressure of the fuel to a range of 6 bar to 10 bar, and then store the fuel in the second pressure accumulator chamber 132. In this way, the pressure of the fuel in the second pressure accumulator chamber 132, the first pressure accumulator chamber 112, the inner cavity 122 of the common rail pipe 120, and the high-pressure pipeline is 6 bar to 10 bar.

[0066] In this embodiment, the hydraulic oil supply device further includes an electric pump 160. The electric pump 160 includes a first pump outlet and a first pump inlet. The first pump outlet is connected to the oil inlet pipeline 280 through a pipeline. The first pump inlet is connected to the oil tank pipeline 260 through a pipeline. In this way, the electric pump 160 can transport the fuel in the oil tank 140 to the second oil inlet 133 of the high-pressure oil pump 130 through the oil inlet pipeline 280.

[0067] In this embodiment, the hydraulic oil supply device further includes a mechanical pump 170. The mechanical pump 170 may be a gear pump. The mechanical pump 170 includes a second pump outlet and a second pump inlet. The second pump outlet is connected to the oil inlet pipeline 280 through a pipeline. The second pump inlet is connected to the oil tank pipeline 260 through a pipeline. In this way, the mechanical pump 170 can transport the fuel in the oil tank 140 to the second oil inlet 133 of the high-pressure oil pump 130 through the oil inlet pipeline 280.

[0068] In this embodiment, the hydraulic oil supply device also includes a first one-way valve 180 and a second one-way valve 190. The first valve inlet of the first one-way valve 180 is connected to the first pump outlet of the electric pump 160. The first valve outlet of the first one-way valve 180 is connected to the oil inlet pipe 280. Thus, the fuel in the oil inlet pipe 280 is prevented from flowing back to the first pump outlet of the electric pump 160. The second valve inlet of the second one-way valve 190 is connected to the second pump outlet of the mechanical pump 170. The second valve outlet of the second one-way valve 190 is connected to the oil inlet pipe 280. Thus, the fuel in the oil inlet pipe 280 is prevented from flowing back to the second pump outlet of the mechanical pump 170. The first one-way valve 180 and the second one-way valve 190 can prevent the electric pump 160 and the mechanical pump 170 from affecting each other.

[0069] In this embodiment, when starting the internal combustion engine, the electric pump 160 can be started to pre-fill the oil through the electric pump 160. At this time, the mechanical pump 170 is in a stopped state, and the electric pump 160 delivers the fuel in the fuel tank 140 to the high-pressure oil pump 130. The high-pressure oil pump 130 increases the pressure of the fuel and then delivers it to the second pressure accumulation chamber 132. In this way, when starting the internal combustion engine, the fuel is delivered to the high-pressure oil pump 130 through the electric pump 160. Since the oil supply pressure of the electric pump 160 is large, the fuel can be quickly filled in the second pressure accumulation chamber 132, the first pressure accumulation chamber 112, the internal cavity 122 of the common rail pipe 120, and the high-pressure oil pipe. The common rail pressure can be quickly established in the common rail pipe 120, and the internal combustion engine starts quickly, which is suitable for the starting requirements of a high-power emergency power station including an internal combustion engine.

[0070] In an embodiment not shown, a pneumatic pump may also be provided so that when the internal combustion engine is started, the fuel in the fuel tank 140 is delivered to the high-pressure fuel pump 130 through the pneumatic pump.

[0071] In this embodiment, after the internal combustion engine is successfully started, when the rotation speed of the crankshaft of the internal combustion engine is ≥ 40% of the rated rotation speed, the mechanical pump 170 can work normally to ensure the common rail pressure in the common rail pipe 120. In this way, when the rotation speed of the crankshaft of the internal combustion engine is ≥ 40% of the rated rotation speed, the electric pump 160 can be stopped and the mechanical pump 170 can be started.

[0072] In this embodiment, if Figure 2 and Figure 3As shown, the hydraulic oil supply device also includes a relief valve 210, a temperature sensor 250, a pipeline pressure sensor 220 and a connection module 230. The connection module 230 is provided with a module internal channel, a temperature interface 231, a pressure interface 232, an overflow interface 233, a first liquid inlet 234, a second liquid inlet 235, and a module oil outlet 236. The relief valve 210 includes an overflow inlet 211 and an overflow oil return port 212. The first liquid inlet 234 and the second liquid inlet 235 are both connected to the oil inlet pipeline 280. The overflow interface 233, the first liquid inlet 234, the second liquid inlet 235, the temperature interface 231, and the pressure interface 232 are all connected to the module internal channel of the connection module 230. The temperature sensor 250 is connected to the temperature interface 231 to measure the temperature of the liquid in the module internal channel of the connection module 230. The pipeline pressure sensor 220 is connected to the pressure interface 232 to measure the pressure of the liquid in the module internal channel of the connection module 230.

[0073] The overflow inlet 211 of the overflow valve 210 is connected to the overflow interface 233. At this time, the overflow inlet 211 of the overflow valve 210 and the overflow interface 233 are connected to keep the pressure of the liquid in the module internal channel of the connection module 230 within a preset range. Therefore, by integrating the overflow valve 210, the pipeline pressure sensor 220, and the temperature sensor 250 in the connection module 230, the hydraulic oil supply device is more compact and has a simple structure; it is convenient to adjust the overflow valve 210, the maintenance of the hydraulic oil supply device, and the reliability of the hydraulic oil supply device is improved. In addition, the module internal channel of the connection module 230 is divided, and the liquid in the oil inlet pipeline 280 is divided to the pipeline pressure sensor 220, the temperature sensor 250, the high-pressure oil pump 130, and the overflow inlet 211 of the overflow valve 210.

[0074] In this embodiment, the overflow oil return port 212 of the overflow valve 210 is connected to the oil return pipe 150. The overflow valve 210 can be a straight-through overflow valve 210. By adjusting the overflow valve 210, the pressure of the fuel in the oil inlet pipe 280 can be maintained within a preset range, the pressure value of the fuel entering the second oil inlet port 133 of the high-pressure oil pump 130 can be stabilized, and the pressure of the oil inlet pipe 280 under all working conditions can be stably regulated. Compared with the method of using an orifice plate and a one-way valve to control the fuel pressure in the oil inlet pipe 280, in this embodiment, due to the effect of the overflow valve 210, the pressure of the fuel in the oil inlet pipe 280 is more stable, so that the pressure of the fuel in the oil inlet pipe 280 is not affected by the engine speed, and the pressure of the fuel in the oil inlet pipe 280 is avoided. The phenomenon of "holding up" occurs.

[0075] In this embodiment, the hydraulic oil supply device may include an ECU electronic control unit 240. The temperature sensor 250, the pipeline pressure sensor 220, the injector 110, and the high-pressure oil pump 130 may be electrically connected to the electronic control unit 240. In this way, the electronic control unit 240 can obtain the temperature of the fuel in the oil inlet pipeline 280 in real time through the temperature sensor 250. The electronic control unit 240 can obtain the pressure of the fuel in the oil inlet pipeline 280 in real time through the pipeline pressure sensor 220. The electronic control unit 240 can control the operation of the high-pressure oil pump 130 in real time according to the pressure and temperature of the fuel in the oil inlet pipeline 280. The electronic control unit 240 can control the injector 110 to spray atomized fuel into the combustion chamber of the internal combustion engine. The electronic control unit 240 can also be electrically connected to the electric pump 160 and the mechanical pump 170 to control the operation of the electric pump 160 and the mechanical pump 170 to realize the automatic operation of the hydraulic oil supply device.

[0076] In this embodiment, the hydraulic oil supply device further includes a rail pressure sensor 290. The rail pressure sensor 290 may be a pressure sensor. The rail pressure sensor 290 is disposed on the common rail pipe 120 to measure the pressure of the fuel in the internal cavity 122 of the common rail pipe 120. The rail pressure sensor 290 is electrically connected to the electronic control unit 240, so that the electronic control unit 240 can obtain the pressure of the fuel in the internal cavity 122 of the common rail pipe 120 in real time through the rail pressure sensor 290, and then control the operation of the high-pressure oil pump 130.

[0077] In this embodiment, the hydraulic oil supply device further includes a fine filter 310. The fine filter 310 is arranged on the oil inlet pipeline 280 to filter out impurities with smaller particles in the fuel on the oil inlet pipeline 280. Along the flow direction of the fuel on the oil inlet pipeline 280, the fine filter 310, the temperature sensor 250, and the pipeline pressure sensor 220 are arranged in sequence. That is, after the fuel flows out from the first pump outlet of the electric pump 160 or the second pump outlet of the mechanical pump 170, it flows through the fine filter 310, the temperature sensor 250, and the pipeline pressure sensor 220 in sequence and then enters the second oil inlet 133 of the high-pressure oil pump 130.

[0078] In this embodiment, the hydraulic oil supply device further includes a coarse filter 320 and a stop valve 330. The coarse filter 320 and the stop valve 330 are arranged on the oil tank pipeline 260. In this way, the coarse filter 320 can filter out impurities with larger particles in the fuel flowing out of the oil tank outlet 142. The stop valve 330 can close the oil tank pipeline 260 at any time to prevent the fuel in the oil tank 140 from entering the electric pump 160 and the mechanical pump 170. In this way, the oil tank pipeline 260 can be closed by closing the stop valve 330 in an emergency.

[0079] This embodiment also provides a ship. The ship may include a generator set, and the generator set includes an internal combustion engine and the aforementioned hydraulic oil supply device.

[0080] In this embodiment, the ship may include a generator set, which includes an internal combustion engine and the aforementioned hydraulic oil supply device. When starting the internal combustion engine, the electric pump 160 may be started to pre-fill the oil through the electric pump 160. At this time, the mechanical pump 170 is in a stopped state. The electric pump 160 delivers the fuel in the fuel tank 140 to the high-pressure oil pump 130. The high-pressure oil pump 130 increases the pressure of the fuel and then delivers it to the second pressure accumulation chamber 132. In this way, when starting the internal combustion engine, the fuel is delivered to the high-pressure oil pump 130 through the electric pump 160. Since the oil supply pressure of the electric pump 160 is large, the fuel can quickly fill the second pressure accumulation chamber 132, the first pressure accumulation chamber 112, the internal cavity 122 of the common rail pipe 120, and the high-pressure oil pipe. The common rail pressure can be established quickly in the common rail pipe 120, and the internal combustion engine starts quickly, which is suitable for the starting requirements of a high-power emergency power station including an internal combustion engine.

[0081] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "component" and the like appearing herein may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing herein may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0082] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A hydraulic oil supply device for an internal combustion engine, the internal combustion engine comprising an injector for spraying atomized fuel into a combustion chamber of the internal combustion engine, characterized in that: include: A common rail pipe, wherein the inner volume of the common rail pipe is connected to the first pressure storage chamber of the fuel injector; a high-pressure oil pump, wherein the second pressure storage chamber of the high-pressure oil pump is in communication with the internal volume chamber of the common rail pipe, and the high-pressure oil pump is used to increase the pressure of the fuel entering from the second oil inlet thereof and then deliver the fuel to the second pressure storage chamber; A fuel tank, wherein the internal space of the fuel tank is provided with fuel, and the internal space of the fuel tank is respectively connected to the first oil return port of the injector, the second oil return port of the high-pressure fuel pump, and the third oil return port of the common rail pipe through an oil return pipeline; an electric pump, wherein a first pump outlet of the electric pump is in communication with the second oil inlet, and a first pump inlet of the electric pump is in communication with the internal space of the oil tank; a mechanical pump, wherein a second pump outlet of the mechanical pump is in communication with the second oil inlet, and a second pump inlet of the mechanical pump is in communication with the internal space of the oil tank; When the hydraulic oil supply device is started, the electric pump is started to deliver fuel to the first pressure accumulation chamber, the second pressure accumulation chamber, and the common rail pipe, and the mechanical pump is in a stopped state; When the rotation speed of the crankshaft of the internal combustion engine is ≥ 40% of the rated rotation speed, the electric pump stops working and the mechanical pump starts working; The hydraulic oil supply device further comprises a first one-way valve, a first valve inlet of the first one-way valve is connected to a first pump outlet of the electric pump, and a first valve outlet of the first one-way valve is connected to the second oil inlet; The hydraulic oil supply device further comprises a second one-way valve, a second valve inlet of the second one-way valve is connected to a second pump outlet of the mechanical pump, and a second valve outlet of the second one-way valve is connected to the second oil inlet; The hydraulic oil supply device further comprises a relief valve, the relief inlet of the relief valve is connected to the second oil inlet, and the relief outlet of the relief valve is connected to the internal space of the oil tank through the oil return pipeline; The hydraulic oil supply device further includes a temperature sensor, a pipeline pressure sensor, and a connection module, wherein the temperature sensor, the pipeline pressure sensor, and the overflow valve are all arranged on the connection module, the overflow inlet is connected to the second oil inlet through the module internal channel of the connection module, and the temperature sensor and the pipeline pressure sensor are used to measure the temperature and pressure of the fuel in the module internal channel; The hydraulic oil supply device also includes an electronic control unit. The temperature sensor, the pipeline pressure sensor, and the high-pressure oil pump are electrically connected to the electronic control unit. The electronic control unit obtains the temperature of the fuel in the oil inlet pipeline through the temperature sensor, and obtains the pressure of the fuel in the oil inlet pipeline through the pipeline pressure sensor. The electronic control unit controls the operation of the high-pressure oil pump according to the pressure and temperature of the fuel in the oil inlet pipeline.

2. The hydraulic oil supply device according to claim 1, characterized in that: The fuel pressure in the second pressure accumulation chamber is 6 bar to 10 bar.

3. The hydraulic oil supply device according to claim 1, characterized in that: The hydraulic oil supply device also includes a coarse filter and a fine filter. The coarse filter is arranged on a tank pipe connected to the oil tank outlet of the oil tank to filter the fuel flowing out of the oil tank. The fine filter is arranged on an oil inlet pipe connected to the second oil inlet to filter the fuel flowing out of the electric pump or the mechanical pump.

4. A ship, characterized in that: Said vessels include: Internal combustion engines; and A hydraulic oil supply device according to any one of claims 1 to 3.

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