Vacuum boosting system and vehicle

Abstract

The utility model belongs to the technical field of vehicle engineering, and particularly relates to a vacuum boosting system and a vehicle. The vacuum boosting system comprises a vacuum pump, a vacuum booster and a control valve, the vacuum pump is communicated with the vacuum booster, a one-way valve is arranged between the vacuum pump and the vacuum booster, the one-way valve is configured to be in one-way conduction from the vacuum booster to the vacuum pump, a first port of the control valve is communicated between the one-way valve and the vacuum pump, and a second port of the control valve is communicated between the one-way valve and the vacuum pump. A second port of the control valve is used for being communicated with the atmosphere, the control valve has a first state and a second state, when the control valve is in the first state, the first port is communicated with the second port, and when the control valve is in the second state, the first port is separated from the second port. According to the technical scheme, when the one-way valve leaks air slowly, air can be sucked from the atmosphere through the first port and the second port of the control valve, and therefore the problem that engine oil is sucked back from a vacuum pump is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle engineering technical field, concretely relates to a vacuum booster system and vehicle. BACKGROUND

[0002] The vacuum booster system is the assembly of vacuum pump and oil pump, and is immersed in the oil pan together, when the engine stops, the vacuum booster is in vacuum state, because the slow air leakage exists in the sealing one-way valve between the vacuum booster and the vacuum pump, the negative pressure in the vacuum booster can suck the oil in the oil pan into the vacuum booster, which causes the failure of the rubber sealing ring in the vacuum booster, and further causes the brake booster failure and poor reliability. SUMMARY

[0003] The utility model discloses a vacuum booster system and vehicle, which can solve the problem of vacuum booster back suction of vacuum pump oil in the prior art.

[0004] The utility model discloses a vacuum booster system and vehicle, which can solve the problem of vacuum booster back suction of vacuum pump oil in the prior art.

[0005] Vacuum pump;

[0006] Vacuum booster, the vacuum pump and the vacuum booster are communicated, and a one-way valve is arranged between the vacuum pump and the vacuum booster, and the one-way valve is configured to be one-way conducted from the vacuum booster to the vacuum pump;

[0007] Control valve, the first port of the control valve is communicated between the one-way valve and the vacuum pump, the second port of the control valve is used for being communicated with the atmosphere, the control valve has first state and second state, when the control valve is in the first state, the first port and the second port are communicated, when the control valve is in the second state, the first port and the second port are disconnected.

[0008] According to the technical scheme of the utility model, when the control valve is in the first state, i.e. when the engine stops, the vacuum pump stops working, at this time, the first port and the second port are communicated, when the one-way valve slowly leaks, it can suck air from the atmosphere through the first port and the second port of the control valve, thereby avoiding the problem of back suction of oil from the vacuum pump, when the control valve is in the second state, i.e. when the engine starts, the vacuum pump works, at this time, because the first port and the second port are disconnected, the vacuum pump can stably perform the vacuumizing operation on the vacuum booster.

[0009] In addition, the vacuum booster system according to the utility model can also have the following additional technical features:

[0010] In some embodiments of the utility model, the control valve includes valve body and valve core, the passage is formed in the valve body, the first port and the second port are connected with the passage respectively, the valve core is elastically connected to the passage, and can move to the direction of approaching or deviating from the first port, to switch the first state or the second state of the control valve.

[0011] In some embodiments of the utility model, the passage includes sealing cavity and communication cavity, the sealing cavity is connected with the first port and the second port respectively, the communication cavity is connected with the sealing cavity and the second port respectively, the valve core is sealingly arranged in the sealing cavity, and can move towards or away from the first port.

[0012] In some embodiments of the utility model, the valve core includes connected plugging part and sealing part, the sealing part is sealingly arranged in the sealing cavity, the plugging part is arranged on the side of the sealing part towards the first port, and the plugging part can move towards or away from the first port to cut off or connect the first port and the sealing cavity.

[0013] In some embodiments of the utility model, the control valve further includes elastic member, the elastic member is sleeved on the outside of the plugging part, and abuts between the side of the sealing part towards the first port and the inner wall surface of the sealing cavity.

[0014] In some embodiments of the utility model, the valve core further includes protruding part, the protruding part is arranged on the side of the sealing part away from the plugging part, and the projection of the protruding part towards the sealing part is located in the sealing part.

[0015] In some embodiments of the utility model, when the control valve is in the first state, the plugging part is located in the sealing cavity, and the first port is connected with the second port through the sealing cavity and the communication cavity, when the control valve is in the second state, at least part of the plugging part is located in the first port, and the first port is cut off from the sealing cavity.

[0016] In some embodiments of the utility model, a sealing member is arranged between the inner wall surface of the sealing cavity and the sealing part.

[0017] In some embodiments of the utility model, the vacuum power assisting system further includes oil pump, and the oil pump is drivingly connected with the vacuum pump.

[0018] The second aspect of the utility model provides a vehicle with the vacuum power assisting system. BRIEF DESCRIPTION OF DRAWINGS

[0019] 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 with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present inventive subject matter thereto. Like reference numerals are used to indicate like or similar elements throughout the several views of the drawings. In the drawings:

[0020] Figure 1 A structure schematic diagram of a vacuum booster system according to the embodiments of the present application is shown schematically;

[0021] Figure 2 For Figure 1 A cross-sectional structure schematic diagram of the control valve in the first state.

[0022] The various reference numbers in the drawings represent the following:

[0023] 10, vacuum pump;

[0024] 20, vacuum booster;

[0025] 30, one-way valve;

[0026] 40, control valve; 41, valve body; 411, first port; 412, second port; 413, sealing cavity; 414, communication cavity; 421, sealing part; 422, blocking part; 423, protruding part; 43, elastic member. DETAILED DESCRIPTION

[0027] Example embodiments of the present disclosure will be described herein below with reference to the accompanying drawings. While example embodiments of the present disclosure are illustrated in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0028] 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" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" 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 in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0029] Although the terms first, second, third, etc. can 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 can 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.

[0030] For ease of description, spatial relative terms can be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inner side", "outer side", "under", "below", "upper", "above", etc. Such spatial relative terms are intended to include 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, an element described as "below" or "under" another element or feature would then be oriented "above" or "above" the other element or feature. Therefore, the example term "below" can include both the above and below orientations.

[0031] The vacuum booster system is an assembly of a vacuum pump and an oil pump, and is immersed in an oil pan. When the engine is stopped, the vacuum booster is in a vacuum state because of the slow air leakage of the one-way valve between the vacuum booster and the vacuum pump. The negative pressure in the vacuum booster can suck the oil from the oil pan into the vacuum booster, causing the rubber sealing ring in the vacuum booster to fail, and further causing the brake booster to fail, which has poor reliability.

[0032] Figure 1 The structure of the vacuum booster system according to the embodiment of the present application is schematically shown. Figure 2 For Figure 1 The cross-sectional structure of the control valve 40 in the first state is schematically shown. Figure 1 And 2The utility model provides a vacuum booster system and vehicle as shown, the utility model discloses a vacuum booster system includes vacuum pump 10, vacuum booster 20 and control valve 40, and vacuum pump 10 and vacuum booster 20 are communicated through first pipe line, and vacuum pump 10 and vacuum booster 20 are provided with check valve 30 between, and the first port 411 of control valve 40 is communicated between check valve 30 and vacuum pump 10 through second pipe line, and the second port 412 of control valve 40 is used for communicating with atmosphere, and control valve 40 has first state and second state, when control valve 40 is in first state, first port 411 and second port 412 are communicated, when control valve 40 is in second state, first port 411 and second port 412 are cut off.

[0033] According to the technical scheme of the utility model, when control valve 40 is in first state, namely when engine stops, vacuum pump 10 stops operation, when check valve 30 slowly leaks, first port 411 and second port 412 of control valve 40 are communicated to suck air from atmosphere, thereby avoiding the problem of sucking oil from vacuum pump 10, when control valve 40 is in second state, namely when engine starts, vacuum pump 10 operates, and because first port 411 and second port 412 are cut off, vacuum pump 10 can stably perform vacuumizing operation on vacuum booster 20.

[0034] Specifically, in the embodiment, the check valve 30 is configured to be unidirectionally conducted from the vacuum booster 20 to the vacuum pump 10.

[0035] In some embodiments of the utility model, as shown in Figure 2 As shown, the control valve 40 includes a valve body 41 and a valve core, the valve body 41 is formed with a passage, the first port 411 and the second port 412 are respectively communicated with the passage, the valve core is elastically connected to the passage, and can move towards or away from the first port 411 to switch the first state or the second state of the control valve 40. In the embodiment, the valve core is arranged in the passage of the valve body 41, and the valve core is in a normally open state under no external force, i.e. the first state, and is switched to the second state under external force.

[0036] Specifically, when the engine starts (i.e. the second state), since the vacuum pump 10 is driven by the oil pump, the pipeline between the one-way valve 30 and the vacuum pump 10 is vacuum, and at this time the first port 411 and the second port 412 are communicated, the valve core can be moved to the first port 411 by the atmospheric pressure and the first port 411 is blocked, so that the first port 411 and the second port 412 are disconnected. When the engine stops, the vacuum pump 10 also stops working, and since the valve core is elastically connected in the channel, it can be reset by the elastic force and the first port 411 and the second port 412 are communicated again, when the one-way valve 30 slowly leaks, the first port 411 and the second port 412 of the control valve 40 can suck air from the atmosphere, thereby avoiding the problem of sucking oil from the vacuum pump 10.

[0037] In some embodiments of the present application, as shown in Figure 2 The channel includes a sealing cavity 413 and a communication cavity 414, the sealing cavity 413 is communicated with the first port 411 and the second port 412 respectively, the communication cavity 414 is communicated with the sealing cavity 413 and the second port 412 respectively, the valve core is sealingly arranged in the sealing cavity 413 and can move towards or away from the first port 411. In this embodiment, the sealing cavity 413 is used to accommodate the valve core and support the valve core to move towards or away from the first port 411.

[0038] Specifically, when the engine starts (i.e. the second state), since the vacuum pump 10 is driven by the oil pump, the pipeline between the one-way valve 30 and the vacuum pump 10 is vacuum, and at this time the first port 411 and the second port 412 are communicated, the valve core can be moved to the first port 411 by the atmospheric pressure and the first port 411 is blocked, so that the first port 411 and the second port 412 are disconnected. When the engine stops, the vacuum pump 10 also stops working, and since the valve core is elastically connected in the channel, it can be reset by the elastic force and the first port 411 and the second port 412 are communicated again, when the one-way valve 30 slowly leaks, the first port 411 and the second port 412 of the control valve 40 can suck air from the atmosphere, thereby avoiding the problem of sucking oil from the vacuum pump 10.

[0039] In some embodiments of the present application, as shown in Figure 2As shown, the valve core comprises a sealing part 421 and a blocking part 422 connected with each other, the sealing part 421 is arranged in the sealing cavity 413, the blocking part 422 is arranged on the side of the sealing part 421 facing the first port 411, and the blocking part 422 can move towards or away from the first port 411 to cut off or communicate the first port 411 and the sealing cavity 413. In the embodiment, the sealing part 421 is used for sealing the sealing cavity 413 and can move towards or away from the first port 411 under the push of the atmospheric pressure.

[0040] In some embodiments of the utility model, as shown in Figure 2 As shown, the control valve 40 further comprises an elastic member 43, the elastic member 43 is sleeved outside the blocking part 422 and abuts between the side of the sealing part 421 facing the first port 411 and the inner wall surface of the sealing cavity 413. In the embodiment, when the vacuum pump 10 stops, the pipeline between the one-way valve 30 and the vacuum pump 10 is not in vacuum, thus the push force of the atmospheric pressure on the valve core decreases, and the elastic member 43 can promote the reset of the valve core, so that the valve core quickly recovers from the second state to the first state.

[0041] In some embodiments of the utility model, as shown in Figure 2 As shown, the valve core further comprises a protruding part 423, the protruding part 423 is arranged on the side of the sealing part 421 away from the blocking part 422, and the projection of the protruding part 423 towards the sealing part 421 is located in the sealing part 421. In the embodiment, in order to prevent the side of the sealing part 421 away from the blocking part 422 from being completely attached to the inner wall surface of the sealing cavity 413, and thus it is difficult for the atmospheric pressure to extrude the sealing part 421, the protruding part 423 is arranged on the side of the sealing part 421 away from the blocking part 422, and the projection of the protruding part 423 towards the sealing part 421 is located in the sealing part 421, which can prevent the sealing part 421 from being completely attached to the inner wall surface of the sealing cavity 413, facilitate the extrusion of the atmospheric pressure on the sealing part 421, and thus improve the moving speed of the valve core and the reliability.

[0042] In some embodiments of the utility model, as shown in Figure 2As shown, when the control valve 40 is in the first state (i.e. engine stop), the pipeline between the one-way valve 30 and the vacuum pump 10 is in a non-vacuum state, and the atmospheric pressure cannot push the valve core, and the blocking part 422 is located in the sealing cavity 413 due to the elastic force of the elastic member 43, at this time, the first port 411 is communicated with the second port 412 through the sealing cavity 413 and the communication cavity 414, that is, the normally open state, and when the one-way valve 30 slowly leaks, air is sucked from the atmosphere through the first port 411, the sealing cavity 413, the communication cavity 414 and the second port 412 of the control valve 40, thereby avoiding the problem of oil suction from the vacuum pump 10. When the control valve 40 is in the second state (i.e. engine start), the pipeline between the one-way valve 30 and the vacuum pump 10 is in a vacuum state, and since the atmospheric pressure is communicated with the first port 411 through the communication cavity 414 and the sealing cavity 413, the valve core can be pushed towards the first port 411, and at least part of the blocking part 422 is located in the first port 411, that is, the first port 411 is separated from the sealing cavity 413, at this time, the vacuum pump 10 can stably perform the vacuumizing operation on the vacuum booster 20.

[0043] In some embodiments of the present application, a sealing member is arranged between the inner wall surface of the sealing cavity 413 and the sealing part 421. In this embodiment, the sealing member can be a sealing ring, which can further provide the sealing performance between the sealing part 421 and the sealing cavity 413.

[0044] In some embodiments of the present application, as shown in Figure 1 The vacuum booster system further comprises an oil pump, and the oil pump is in driving connection with the vacuum pump 10. In this embodiment, the vacuum booster system further comprises a liquid path unit, and the liquid path unit comprises the oil pump, the oil pump is in synchronous driving connection with the vacuum pump 10, the engine is started, the oil pump can drive the vacuum pump 10 to rotate, and the engine is stopped, and the oil pump and the vacuum pump 10 are both stopped.

[0045] Further, in this embodiment, the vacuum booster system further comprises a crankcase, the crankcase is connected with the vacuum pump 10, and the liquid path unit further comprises an oil pan, the oil pan is in communication with the oil pump. The oil outlet of the oil pump is in communication with the main oil gallery.

[0046] Further, the vacuum booster system in the utility model adds a normally open control valve 40 between the one-way valve 30 and the vacuum pump 10, when the engine is running, the vacuum pump 10 works, the pipeline between the one-way valve 30 and the vacuum pump 10 forms negative pressure, the pressure difference formed in the pipeline of atmosphere and vacuum can push the valve core to move right, make the control valve 40 be in the second state, namely the first port 411 and the second port 412 are disconnected.

[0047] The utility model further provides a vehicle with the vacuum booster system.

[0048] According to the vacuum booster system of the vehicle of the utility model, when the control valve 40 is in the first state, namely when the engine stops, the vacuum pump 10 stops working, at this time, the first port 411 and the second port 412 are connected, when the one-way valve 30 slowly leaks, it will suck air from the atmosphere through the first port 411 and the second port 412 of the control valve 40, thereby avoiding the problem of sucking machine oil from the vacuum pump 10, when the control valve 40 is in the second state, namely when the engine starts, the vacuum pump 10 works, at this time, since the first port 411 and the second port 412 are disconnected, it can make the vacuum pump 10 can stably carry out the vacuumizing operation to the vacuum booster 20.

[0049] The above is only the preferred specific implementation mode of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of the change or replacement within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A vacuum boosting system, characterized by, The vacuum booster system comprises: a vacuum pump; a vacuum booster, which is communicated with the vacuum pump and is provided with a one-way valve between the vacuum pump and the vacuum booster, the one-way valve being configured to be one-way communicated from the vacuum booster to the vacuum pump; a control valve, a first port of which is communicated between the one-way valve and the vacuum pump, a second port of which is used to be communicated with the atmosphere, the control valve having a first state and a second state, when the control valve is in the first state, the first port and the second port are communicated, when the control valve is in the second state, the first port and the second port are disconnected.

2. The vacuum boosting system according to claim 1, characterized in that The control valve comprises a valve body and a valve core, the valve body is formed with a channel, the first port and the second port are respectively communicated with the channel, the valve core is elastically connected to the channel and can be moved towards or away from the first port to switch the first state or the second state of the control valve.

3. The vacuum boosting system of claim 2, wherein, The channel comprises a sealing cavity and a communicating cavity, the sealing cavity is respectively communicated with the first port and the second port, the communicating cavity is respectively communicated with the sealing cavity and the second port, the valve core is sealingly arranged in the sealing cavity and can be moved towards or away from the first port.

4. The vacuum boosting system of claim 3, wherein The valve core comprises a sealing part and a blocking part connected with each other, the sealing part is sealingly arranged in the sealing cavity, the blocking part is arranged on a side of the sealing part facing the first port, the blocking part can be moved towards or away from the first port to disconnect or communicate the first port and the sealing cavity.

5. The vacuum boosting system of claim 4, wherein, The control valve further comprises an elastic member, the elastic member is sleeved outside the blocking part and abuts between a side of the sealing part facing the first port and an inner wall surface of the sealing cavity.

6. The vacuum boosting system of claim 4, wherein, The valve core further comprises a protruding part, the protruding part is arranged on a side of the sealing part away from the blocking part, a projection of the protruding part towards the sealing part is located in the sealing part.

7. The vacuum boosting system of claim 4, wherein, When the control valve is in the first state, the blocking part is located in the sealing cavity, and the first port is communicated with the second port through the sealing cavity and the communicating cavity, when the control valve is in the second state, at least part of the blocking part is located in the first port, and the first port is disconnected with the sealing cavity.

8. The vacuum boosting system of claim 4, wherein, A sealing member is arranged between the inner wall surface of the sealing cavity and the sealing part.

9. The vacuum boosting system of claim 1, wherein, The vacuum booster system further comprises an oil pump, which is drivingly connected with the vacuum pump.

10. A vehicle characterized by comprising: The vacuum booster system according to any one of claims 1-9.

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