CN214533143U - Fuel system and vehicle with same - Google Patents

Abstract

The utility model belongs to the technical field of engine system, concretely relates to fuel oil system and have its vehicle. The utility model provides a fuel oil system includes gear pump and injection pump, the gear pump with be equipped with first passageway between the injection pump, be equipped with the second passageway between gear pump and the HC injection system, be equipped with the orifice on the injection pump, the orifice can indirectly be adjusted HC injection system's injection pressure. Through using the fuel oil system among this technical scheme, set up the orifice on the injection pump, can get into the oil pressure size in the injection pump according to the diameter influence of orifice, and then indirectly influence HC injection system's oil pressure size to control HC and spray the final expected pressure of getting the hydraulic fluid port, the utility model discloses simple structure, the improvement cost is little, has promoted HC injection system's controllability simultaneously.

Description

Fuel system and vehicle with same

Technical Field

The utility model belongs to the technical field of engine system, concretely relates to fuel oil system and have its vehicle.

Background

The gear pump absorbs oil from the oil tank, after the low-pressure fuel pressurized by the gear pump passes through fine filtration, one way enters the high-pressure oil pump, the other way improves the HC injection system for DPF regeneration, the pressure of an oil outlet of the HC injection system with the existing structure is the same as the pressure at the inlet of the oil metering valve, the pressure is determined by the opening pressure of the overflow valve, in order to keep the fuel pressure at the inlet of the oil metering valve constant and stable in control, the opening pressure of the overflow valve is lower, the oil pressure entering the oil injection pump is larger, and further the HC injection pressure is low during DPF regeneration, poor atomization exists, poor combustion and other influences.

SUMMERY OF THE UTILITY MODEL

The utility model aims at least solving the problem that influences fuel system HC injection pressure when DPF regenerates. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides a fuel oil system, including gear pump and injection pump, the gear pump with be equipped with first passageway between the injection pump, be equipped with the second passageway between gear pump and the HC injection system, be equipped with the orifice on the injection pump, the orifice can indirectly be adjusted HC injection system's injection pressure.

Through using the fuel oil system among this technical scheme, set up the orifice on the injection pump, can get into the oil pressure size in the injection pump according to the diameter influence of orifice, and then indirectly influence HC injection system's oil pressure size to control HC and spray the final expected pressure of getting the hydraulic fluid port, the utility model discloses simple structure, the improvement cost is little, has promoted HC injection system's controllability simultaneously.

In addition, according to the utility model discloses a fuel oil system still can have following additional technical characterstic:

the utility model discloses an in some embodiments, first passageway is close to the one end of injection pump is equipped with the communicating piece, the side of communicating piece is equipped with the connecting hole, the connecting hole with first passageway is linked together.

In some embodiments of the present invention, the communicating member is a ring-shaped structure, and the ring-shaped structure is adapted to the oil injection pump.

The utility model discloses an in some embodiments, the injection pump includes the bolt and the pump body, the top of the pump body is equipped with first oil inlet, the bolt is worn to locate the intercommunication piece and with first oil inlet looks adaptation, the orifice is located the bottom of bolt and with the connecting hole is corresponding.

In some embodiments of the present invention, the bolt includes a head portion and a throttle portion, the head portion is located at a top end of the throttle portion, and the throttle hole is located on a side wall of the throttle portion perpendicular to a direction of a center line of the throttle portion.

In some embodiments of the present invention, the throttling portion is a hollow structure, and the hollow structure is communicated with the throttling hole.

The utility model discloses an in some embodiments, the top of injection pump is equipped with the second oil inlet, the orifice is located the bottom of second oil inlet.

The utility model also provides a vehicle, this vehicle includes the fuel oil system among the above-mentioned embodiment.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows an overall structural schematic diagram of a fuel system according to an embodiment of the present invention;

fig. 2 schematically shows a schematic structural view of an injection pump of a fuel system according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a bolt of the injection pump of the fuel system of FIG. 2;

fig. 4 schematically shows a schematic structural view of an injection pump of a fuel system according to another embodiment of the present invention.

10: a gear pump;

20: injection pump, 21: orifice, 22: bolt, 221: head, 222: throttle portion, 23: a pump body, 231: second oil inlet, 232: oil amount metering valve, 233: an overflow valve;

30: an HC injection system;

40: first passage, 41: a communicating member;

50: a second path.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 schematically shows an overall structural schematic diagram of a fuel system according to an embodiment of the present invention. As shown in FIG. 1, the utility model provides a fuel system and have its vehicle. The utility model provides a fuel oil system includes gear pump 10 and injection pump 20, is equipped with first route 40 between gear pump 10 and the injection pump 20, is equipped with second route 50 between gear pump 10 and the HC injection system 30, is equipped with orifice 21 on the injection pump 20, and orifice 21 can indirectly adjust the injection pressure of HC injection system 30.

Through using the fuel oil system among this technical scheme, set up orifice 21 on injection pump 20, can get into the oil pressure size in injection pump 20 according to orifice 21's diameter influence, and then indirectly influence HC injection system 30's oil pressure size to in the final expected pressure of hydraulic fluid port is got in the control HC injection, the utility model discloses simple structure, improvement cost is little, has promoted HC injection system 30's controllability simultaneously.

In some embodiments of the present invention, as shown in fig. 2, the end of the first passage 40 close to the fuel injection pump 20 is provided with a communicating member 41, and the side of the communicating member 41 is provided with a connecting hole, which is communicated with the first passage 40. The connecting piece is used for cooperateing with first passageway 40 and injection pump 20, and the leading-in connecting hole to the connecting piece of fluid that gets into first passageway 40, and then flow to injection pump 20's orifice 21, influences the oil pressure size that gets into in injection pump 20, and then indirectly influences HC injection system 30's oil pressure size to the final expected pressure of control HC injection oil pick-up mouth. When HC injection pressure needs to be increased, the aperture of the throttle hole 21 can be designed to be a small value, the flow of oil entering the oil injection pump 20 is reduced, most of the oil enters the HC injection system 30, and injection oil pressure is increased. When it is necessary to reduce the HC injection pressure, the orifice 21 may be designed to have a large bore diameter.

In some embodiments of the present invention, the communicating member 41 is a ring-shaped structure, and the ring-shaped structure is adapted to the fuel injection pump 20. The annular structure is used for matching with a bolt 22 on the oil injection pump 20 to realize the function of oil liquid diversion.

In some embodiments of the present invention, as shown in fig. 2, the fuel injection pump 20 includes a bolt 22 and a pump body 23, the top end of the pump body 23 is provided with a first oil inlet, the bolt 22 is inserted into the communicating member 41 and is adapted to the first oil inlet, and the orifice 21 is disposed at the bottom end of the bolt 22 and corresponds to the connecting hole. This allows oil to pass through the communication member 41 and enter the orifice 21 in the bolt 22, thereby controlling the inlet oil pressure of the injection pump 20 and indirectly adjusting the injection pressure of the HC injection system 30.

In some embodiments of the present invention, as shown in fig. 3, the bolt 22 includes a head 221 and a throttle portion 222, the head 221 is located at the top end of the throttle portion 222, the head 221 is used for limiting and fixing the annular structure, the throttle hole 21 is located on the side wall of the direction perpendicular to the center line of the throttle portion 222, and the throttle hole 21 is used for controlling the oil entering the oil injection pump 20 corresponding to the connecting hole, so as to control the oil pressure.

In some embodiments of the present invention, the throttling portion 222 is a hollow structure, and the hollow structure is communicated with the throttle hole 21, so as to guide the oil entering from the throttle hole 21 to the inside of the fuel injection pump 20 for use.

In some embodiments of the present invention, as shown in fig. 4, the top end of the fuel injection pump 20 is provided with a second oil inlet 231, and the throttle hole 21 is provided at the bottom end of the second oil inlet 231. In the embodiment, the throttle hole 21 is arranged at the bottom end of the second oil inlet 231, which can also affect the oil pressure entering the oil injection pump 20, and further indirectly affect the oil pressure of the HC injection system 30.

Specifically, the throttle hole 21 provided at the bottom end of the second oil inlet 231 communicates with the spill valve 233 and the fuel gauge valve 232 of the fuel injection pump 20, respectively.

The utility model also provides a vehicle, fuel oil system including above.

Through using the vehicle among this technical scheme, set up the orifice on the injection pump, can get into the oil pressure size in the injection pump according to the diameter influence of orifice, and then indirectly influence HC injection system's oil pressure size to control HC and spray the final expected pressure of getting the hydraulic fluid port, the utility model discloses simple structure, improvement cost is little, has promoted HC injection system's controllability simultaneously.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The fuel oil system is characterized by comprising a gear pump and a fuel injection pump, wherein a first passage is arranged between the gear pump and the fuel injection pump, a second passage is arranged between the gear pump and the HC injection system, and a throttling hole is formed in the fuel injection pump and can indirectly adjust the injection pressure of the HC injection system.

2. The fuel system of claim 1, wherein a communication member is provided at an end of the first passage close to the injection pump, and a side end of the communication member is provided with a connection hole that communicates with the first passage.

3. The fuel system as recited in claim 2, wherein the communication member is a ring-shaped structure that is adapted to the fuel injection pump.

4. The fuel system of claim 2, wherein the fuel injection pump includes a bolt and a pump body, a first oil inlet is disposed at a top end of the pump body, the bolt is disposed through the communication member and adapted to the first oil inlet, and the orifice is disposed at a bottom end of the bolt and corresponds to the connection hole.

5. The fuel system as recited in claim 4, wherein said bolt includes a head portion and a throttle portion, said head portion being located at a top end of said throttle portion, said throttle hole being provided on a side wall of said throttle portion in a direction perpendicular to a center line of said throttle portion.

6. The fuel system as recited in claim 5, wherein said throttle portion is a hollow structure, said hollow structure communicating with said throttle hole.

7. The fuel system of claim 1, wherein a second oil inlet is provided at a top end of the injection pump, and the orifice is provided at a bottom end of the second oil inlet.

8. A vehicle, characterized by a fuel system according to any one of claims 1-7.

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