Diesel engine oil way and diesel engine thereof

Abstract

The utility model discloses a diesel engine oil way and a diesel engine thereof. The diesel engine oil way comprises a low-pressure oil way, a high-pressure oil way and a filter. A liquid outlet of the low-pressure oil way is communicated with a liquid inlet pipeline of the high-pressure oil way, and a filter is arranged on the communicated pipeline; the filter comprises a lower end cover, a filter tank, an upper end cover, a central pipe, filter paper, a duck tongue pipe and a sintered copper filter disc, the upper end cover covers the two ends of the filter tank; the filter paper is accommodated in the filter tank; the central pipe is inserted into the filter paper central through hole; the duck tongue tube is arranged on the bottom surface of the lower end cover and is inserted into the central tube; and the sintered copper filter disc is accommodated in the interface of the upper end cover. The filter is arranged between the oil tank and the high-pressure oil pump, the sintered copper filter disc is arranged in the upper end cover of the filter, and the duck tongue pipe penetrates into the filter tank, so that the problem that the engine cannot be started after air enters a low-pressure oil way of the engine is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of diesel engines, and in particular to a diesel engine oil circuit and a diesel engine thereof. Background Art

[0002] Diesel engines have the characteristics of high power and good economic performance. As a vehicle power supply device, they are widely used in commercial vehicles at home and abroad. Diesel engine vehicles include: low-pressure oil circuit, that is, the oil circuit system from the vehicle tank to the diesel engine high-pressure oil pump. Due to the installation of oil pipelines, oil-water separators, diesel and filters and other components, the connection interfaces of related pipelines, the layout of the fuel tank, the bends and resistance of the oil pipelines and other external factors, plus the high-pressure oil pump's suction effect on the diesel in the pipeline. During the use of the diesel engine, the inside of the pipeline actually forms a suction to the outside, and the outside air will be sucked into the low-pressure oil circuit from the relevant connection positions.

[0003] When diesel containing air in the low-pressure oil circuit enters the high-pressure oil pump, common rail pipe, injector and other components of the high-pressure oil circuit system of the diesel engine, it will affect the pressure building at the high-pressure oil circuit end, the collected diesel pressure signal and the injection of the injector. For example, when the rail pressure sensor detects air, it will report a high rail pressure fault; if the rail pressure cannot be established on time, it will report a low rail pressure fault. This will cause the diesel engine to be difficult to start or unable to start, or to stall during driving, seriously affecting the normal use of the diesel engine and the end-user's experience. Further maintenance and investigation will also cause economic losses to the user.

[0004] Sintered copper is a filter material with high porosity and specific pore size distribution. It is currently mainly used in the oil-water separator of diesel engines, such as the diesel oil-water separator disclosed in CN201910171102.2 to prevent air blockage, in which the exhaust plug is made of sintered copper. By controlling the aperture of the exhaust plug mounting hole and the bubble point value of the exhaust plug, the large mass of air on the dirty side of the oil-water separator can be effectively converted into tiny bubbles acceptable to the fuel system through the exhaust plug and enter the clean side, while ensuring that the filtration efficiency of the oil-water separator will not be significantly reduced.

[0005] The information disclosed in the background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in the field. Utility Model Content

[0006] In view of the above problems, the present application provides a diesel engine oil circuit and a diesel engine thereof. The filter can effectively filter the air in the diesel, thereby effectively solving the problem of the engine being unable to start due to air entering the low-pressure oil circuit of the engine.

[0007] The present application provides a diesel engine oil circuit, comprising: a low-pressure oil circuit, a high-pressure oil circuit, and a filter; the outlet of the low-pressure oil circuit and the inlet of the high-pressure oil circuit are connected by pipelines, and a filter is arranged on the connected pipelines;

[0008] The filter includes: a lower end cover, a filter tank, an upper end cover, a center tube, filter paper, a duck tongue tube, and a sintered copper filter disc;

[0009] The lower end cover and the upper end cover are arranged at both ends of the filter tank; the filter paper is accommodated and arranged in the filter tank;

[0010] The central tube is inserted into the central through hole of the filter paper; the duck tongue tube is arranged on the bottom surface of the lower end cover and inserted into the central tube;

[0011] The sintered copper filter is accommodated in the interface of the upper end cover.

[0012] Preferably, the duckbill tube extends into 2 / 3 of the length of the filter paper.

[0013] Preferably, the interface comprises: a cylinder and a liquid inlet seat; the cylinder is arranged on the upper end cover and is connected to the duckbill tube; the liquid inlet seat is arranged on the side wall of the cylinder and is connected to the cylinder; and the sintered copper filter is accommodated in the liquid inlet seat.

[0014] Preferably, the liquid inlet seat is connected to the low-pressure oil pipeline; the cylinder is connected to the high-pressure oil pipeline.

[0015] Preferably, the low-pressure oil circuit comprises: an oil tank; the oil tank is connected to the liquid inlet pipeline of the filter.

[0016] Preferably, the oil tank is a filter oil tank.

[0017] Preferably, the high-pressure oil circuit includes: a high-pressure oil pump, a high-pressure oil rail, and an injector; the high-pressure oil pump is connected to the liquid outlet pipeline of the filter; the high-pressure oil rail is connected to the liquid outlet pipeline of the high-pressure oil pump; the injector is connected to the liquid outlet pipeline of the high-pressure oil rail.

[0018] Preferably, the high-pressure oil circuit comprises: a high-pressure oil rail and an electronic control unit are connected through a sensor and an actuator control.

[0019] Another aspect of the present application provides a diesel engine, comprising: the diesel engine oil circuit as described above.

[0020] The beneficial effects of this application include:

[0021] 1) The diesel engine oil circuit provided in the present application effectively solves the problem of the engine being unable to start due to air entering the low-pressure oil circuit of the engine by arranging a filter between the fuel tank and the high-pressure oil pump, and by using a sintered copper filter plate arranged in the upper end cover of the filter and a duckbill tube extending deep into the filter tank.

[0022] 2) The diesel engine provided in the present application can avoid pumping diesel containing air into the high-pressure oil pump, thereby avoiding the problem of the diesel engine being difficult to start, unable to start, or stalling during driving due to the introduction of diesel containing air. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a filter explosion in at least one embodiment provided in the present application;

[0024] Figure 2 A schematic diagram of a filter oil circuit connection in at least one embodiment provided in the present application;

[0025] Legend:

[0026] Upper end cover 1, duckbill tube 11, interface 12, sintered copper filter 2, filter paper 3, center tube 4, lower end cover 5, snap ring 51, bump 52, filter 6, liquid inlet seat 121, high-pressure oil pump 21, oil tank 22, sensor 23, actuator 24, electronic control unit 25, high-pressure oil rail 26, and injector 27. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0029] The technical means that are not described in detail in this application and are not used to solve the technical problems of this application are all set according to the common knowledge in the field, and can be implemented in a variety of common knowledge settings.

[0030] See also Figures 1-2 The diesel engine oil circuit provided in the present application includes: a low-pressure oil circuit, a high-pressure oil circuit, and a filter 6; the outlet of the low-pressure oil circuit and the inlet of the high-pressure oil circuit are connected by pipelines, and the filter 6 is arranged on the connected pipelines;

[0031] The filter 6 used includes: a lower end cover 5, a filter tank, an upper end cover 1, a center tube 4, and a filter paper 3; the lower end cover 5 and the upper end cover 1 are respectively buckled and covered on the top and bottom surfaces of the filter tank; the center tube 4 is accommodated in the through hole in the filter paper 3, and is sleeved on the duck tongue tube 11 arranged on the bottom surface of the lower end cover 5. The sintered copper filter plate 2 and the slag lock are installed on the interface 12 of the upper end cover 1, and the sintered copper filter plate 2 is accommodated in the interface 12 and fixed by the slag lock in the interface 12, which can ensure that the sintered copper filter plate 2 is installed firmly; the duck tongue tube 11 is inserted into the center hole of the filter paper 3 and is spaced apart from the lower end cover 5. The specific structure of the slag lock used in this application is a commonly used lock form in the field, which will not be described here.

[0032] The sintered copper filter 2 is arranged in the interface 12 and can filter out the air contained in the diesel flowing through the interface 12 .

[0033] The sintered copper filter 2 used can filter out the air entering the low-pressure oil circuit and prevent air from entering the high-pressure oil circuit. This can solve the problem of diesel engine vehicles being difficult to start, unable to start, or stalling due to diesel containing air entering the pipeline, effectively improve user experience, and avoid subsequent maintenance.

[0034] The use of this oil circuit can solve the problem of air entering the low-pressure oil circuit of the diesel engine. The sintered copper air management system installed on the diesel filter and the oil-water separator (see Figure 1 ), which is characterized in that the air entering the low-pressure oil circuit is discharged through filtering to prevent air from entering the high-pressure oil circuit.

[0035] In a specific embodiment, a duckbill tube 11 extending two-thirds into the filter tank is provided on the upper end cover 1. When the diesel liquid level cannot fill the filter tank, the duckbill tube 11 extending deep into the filter tank can ensure that the diesel is sucked in normally, preventing air from entering the diesel engine high-pressure system along with the diesel.

[0036] In a specific embodiment, the central tube 4 includes: a plurality of stacked annular units, the annular units include: a first ring body, a second ring body, and a connecting rod; the first ring body and the second ring body are arranged at intervals, and a plurality of connecting rods are arranged at intervals along the circumference of the first ring body and the second ring body, and are respectively connected to the first ring body and the second ring body. This arrangement can provide reliable support for the filter paper 3.

[0037] In a specific embodiment, the lower end cover 5 includes: a disc body, a snap ring 51, and a protrusion 52; the snap ring 51 is arranged on the periphery of the disc body and abuts against the side wall of the filter tank; the protrusion 52 is arranged in the center of the disc body; and the center hole of the filter paper 3 is inserted on the protrusion 52.

[0038] In a specific embodiment, the low-pressure oil circuit includes: an oil tank 22 ; an oil outlet of the oil tank 22 is connected to a liquid inlet pipeline of the filter 6 .

[0039] In a specific embodiment, filters are disposed on both the inlet and outlet of the oil tank 22 .

[0040] In a specific embodiment, the high-pressure oil circuit includes: a high-pressure oil pump 21, a high-pressure oil rail 26, and an injector 27; the liquid outlet of the filter 6 is connected to the liquid inlet pipeline of the high-pressure oil pump 21; the liquid outlet of the high-pressure oil pump 21 is connected to the liquid inlet pipeline of the high-pressure oil rail 26; the liquid outlet of the high-pressure oil rail 26 is connected to the liquid inlet pipeline of the injector 27.

[0041] In a specific embodiment, it includes: a sensor 23, an actuator 24, and an electronic control unit 25; the sensor 23 and the actuator 24 are respectively connected to the high-pressure oil rail 26; the sensor 23 and the actuator 24 are respectively connected to the electronic control unit 25. The oil output of the high-pressure oil rail 26 is effectively controlled through the control loop.

[0042] This oil circuit can effectively reduce the air content in diesel during actual testing.

[0043] In a specific embodiment, the interface 12 includes: a cylinder, a liquid inlet seat 121; the liquid inlet seat 121 is arranged on the side wall of the cylinder and is connected to the duckbill pipe 11; the sintered copper filter 2 is accommodated and arranged in the liquid inlet seat 121. The cylinder of the interface 12 is connected to the liquid inlet pipeline of the high-pressure oil pump 21 as a liquid outlet. According to this arrangement, it is convenient to filter and remove the air in the diesel entering the filter 6.

[0044] Another aspect of the present application also provides a diesel engine, including: the diesel engine oil circuit as described above. The parts of the diesel engine not described in detail are all arranged according to the diesel engine mechanism in the art.

[0045] The diesel engine can effectively avoid the problem of difficulty in starting, inability to start, or flameout during driving caused by the introduction of diesel containing air.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A diesel engine oil circuit, characterized in that: include: Low-pressure oil circuit, high-pressure oil circuit, filter (6); The outlet of the low-pressure oil circuit and the inlet of the high-pressure oil circuit are connected by pipelines, and a filter (6) is arranged on the connected pipelines; The filter (6) comprises: a lower end cover (5), a filter tank, an upper end cover (1), a central tube (4), filter paper (3), a duck tongue tube (11), and a sintered copper filter disc (2); The lower end cover (5) and the upper end cover (1) are arranged at both ends of the filter tank; the filter paper (3) is accommodated and arranged in the filter tank; The central tube (4) is inserted into the central through hole of the filter paper (3); the duck tongue tube (11) is arranged on the bottom surface of the lower end cover (5) and inserted into the central tube (4); The sintered copper filter (2) is accommodated in the interface (12) of the upper end cover (1).

2. The diesel engine oil circuit according to claim 1, characterized in that: The duck tongue tube (11) extends into 2 / 3 of the length of the filter paper (3).

3. The diesel engine oil circuit according to claim 1, characterized in that: The interface (12) comprises: a cylinder and a liquid inlet seat (121); the cylinder is arranged on the upper end cover (1) and is connected to the duckbill tube (11); the liquid inlet seat (121) is arranged on the side wall of the cylinder and is connected to the cylinder; the sintered copper filter (2) is accommodated in the liquid inlet seat (121).

4. The diesel engine oil circuit according to claim 3, characterized in that: The liquid inlet seat (121) is connected to the low-pressure oil pipeline; the cylinder is connected to the high-pressure oil pipeline.

5. The diesel engine oil circuit according to claim 1, characterized in that: The low-pressure oil circuit comprises: an oil tank (22); the oil tank (22) is connected to the liquid inlet pipeline of the filter (6).

6. The diesel engine oil circuit according to claim 5, characterized in that: The oil tank (22) is a filter oil tank.

7. The diesel engine oil circuit according to claim 1, characterized in that: The high-pressure oil circuit comprises: a high-pressure oil pump (21), a high-pressure oil rail (26), and an injector (27); the high-pressure oil pump (21) is connected to a liquid outlet pipeline of a filter (6); the high-pressure oil rail (26) is connected to a liquid outlet pipeline of the high-pressure oil pump (21); and the injector (27) is connected to a liquid outlet pipeline of the high-pressure oil rail (26).

8. The diesel engine oil circuit according to claim 7, characterized in that: The high-pressure oil circuit comprises: a high-pressure oil rail (26) and an electronic control unit (25) which are controlled and connected via a sensor (23) and an actuator (24).

9. A diesel engine, characterized in that: include: A diesel engine oil circuit according to any one of claims 1 to 8.

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