CN208793064U - Engine cap and engine - Google Patents

Abstract

This disclosure relates to a kind of engine cap and engine, the engine cap includes top plate (1), bottom plate (2), hollow main body (3) and pressure limiting valve (4), the top plate (1) and the bottom plate (2) are connected to the both ends of the main body (3), the first air inlet (21) are formed on the bottom plate (2), the first gas outlet (11) are formed on the top plate (1), pressure limiting valve (4) setting is internal in the main body (3), for opening under the conditions of predetermined pressure to be connected to first air inlet (21) and first gas outlet (11).The engine cap of the disclosure can discharge crankcase pressure by engine cap when crankcase pressure is excessive, and lubricating oil leakage and spraying machine oil failure is avoided to occur.

Description

Engine cap and engine

Technical field

This disclosure relates to automotive engine applications, and in particular, to a kind of engine cap and engine.

Background technique

In the prior art, most of automobile engine all uses force ventilated mode, and the exhaust gas generated in crankcase is only Engine aspirating system can be entered by crankcase ventilation pipeline to burn again.But in crankcase ventilation failure (such as ventilation duct Road blocking etc.) in the case of, exhaust gas is assembled in crankcase, cannot exclude, and causes crankcase internal pressure kept to increase, then crankcase Interior huge pressure, which eventually passes through at oil rule, to be discharged, and spraying machine oil failure is caused to occur, and be will lead to when serious and is burnt vehicle accident. Crankcase pressure is more than crankshaft oil seal maximum sealed pressure simultaneously, and machine oil leaks from crankshaft oil seal, causes engine can not It works normally.

Utility model content

Purpose of this disclosure is to provide a kind of engine cap and engines, which can When crankcase pressure is excessive, crankcase pressure is discharged by engine cap, avoids lubricating oil leakage and spraying machine oil event Barrier occurs.

To achieve the goals above, the one side of the disclosure provides a kind of engine cap, including top plate, bottom Plate, hollow main body and pressure limiting valve, the top plate and the bottom plate are connected to the both ends of the main body, shape on the bottom plate At there is the first air inlet, the first gas outlet is formed on the top plate, the pressure limiting valve setting is used in the body interior It opens under the conditions of predetermined pressure to be connected to first air inlet and first gas outlet.

Optionally, the pressure limiting valve is check valve.

Optionally, when the pressure is greater than standard atmospheric pressure, the pressure limiting valve is opened.

Optionally, the pressure limiting valve includes valve body and spool, and the valve body has the second air inlet and the second gas outlet, institute Spool is stated to be pressed against on the inner face of second air inlet, when pressure is greater than standard atmospheric pressure at second air inlet, The spool is opened, and second air inlet is connected to second gas outlet.

Optionally, the valve body is connect with the bottom plate, and second air inlet is connected to first air inlet, described Second gas outlet is connected to by the inner space of the main body with first gas outlet.

Optionally, first gas outlet is multiple, and multiple first gas outlets are evenly arranged on the top plate.

Optionally, the main body is to be formed with external screw thread on cylindric and outer peripheral surface.

Optionally, sealing ring is arranged on the outer peripheral surface of the main body.

Another aspect of the present disclosure provides a kind of engine, including engine cap recited above.

It covers, seals through the above technical solutions, engine cap is mounted on valve cover, need to add Cap filling engine oil can be backed out when machine oil.When crankcase ventilation failure, crankcase pressure is excessive, that is, reaches predetermined Pressure condition, pressure limiting valve are opened, then the first air inlet is connected to by pressure limiting valve with the first gas outlet, thus the pressure in crankcase It can be released via cap, the exhaust gas in crankcase can be discharged into atmosphere, avoid lubricating oil leakage and spraying machine Oily failure occurs, and guarantees engine work.

Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.

Detailed description of the invention

Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:

Fig. 1 is the structural schematic diagram of the engine cap of the disclosure.

Description of symbols

1 top plate, 11 first gas outlet

2 bottom plate, 21 first air inlet

3 main body, 4 pressure limiting valve

41 valve body, 42 spool

43 second air inlet, 44 second gas outlet

5 sealing rings

Specific embodiment

It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.

In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to Specified relative to direction shown in the drawings, " inside and outside " refers to the specified inside such as wall, shell relative to corresponding part and outer Portion.

As shown in Figure 1, the specific embodiment of the disclosure provides a kind of engine cap, including top plate 1, bottom plate 2, hollow main body 3 and pressure limiting valve 4, top plate 1 and bottom plate 2 are connected to the both ends of main body 3, be formed on bottom plate 2 first into Port 21 is formed with the first gas outlet 11 on top plate 1, and pressure limiting valve 4 is arranged inside main body 3, under the conditions of predetermined pressure It opens to be connected to the first air inlet 21 and the first gas outlet 11.

Engine cap is mounted on valve cover and covers, and seals, need plus when machine oil can back out plus Engine oil port cover filling engine oil.When crankcase ventilation failure, crankcase pressure is excessive, that is, reaches predetermined pressure condition, pressure limiting valve 4 It opens, then the first air inlet 21 is connected to by pressure limiting valve 4 with the first gas outlet 11, so that the pressure in crankcase can be via adding Engine oil port cover is released, and the exhaust gas in crankcase can be discharged into atmosphere, and lubricating oil leakage and spraying machine oil failure is avoided to occur, Guarantee engine work.

As a kind of preferred embodiment of the disclosure, optionally, pressure limiting valve 4 is check valve, so that useless in crankcase Gas can be discharged via check valve, but the gas of external environment will not be entered in crankcase by check valve, guarantee crankcase Normal operating pressure (negative pressure).

Since crankcase usually works under negative pressure, optionally, when pressure is greater than standard atmospheric pressure, i.e., it is in crankcase When positive pressure, pressure limiting valve 4 is opened, then pressure can be discharged by pressure limiting valve 4, avoid crankcase internal pressure excessive.

As shown in Figure 1, the specific embodiment as pressure limiting valve 4, optionally, pressure limiting valve 4 include valve body 41 and spool 42, Valve body 41 has the second air inlet 43 and the second gas outlet 44, and spool 42 is pressed against on the inner face of the second air inlet 43, when the When pressure is greater than standard atmospheric pressure at two air inlets 43, spool 42 is opened, and the second air inlet 43 is connected to the second gas outlet 44. Spool 42 seals the second air inlet 43 by self gravity, when pressure is greater than standard atmospheric pressure at the second air inlet 43, spool 42 can overcome self gravity to move up, so that the second air inlet 43 is connected to the second gas outlet 44, and then the first air inlet 21 are connected to the first gas outlet 11, and crankcase pressure can be discharged by cap.

As shown in Figure 1, optionally, valve body 41 is connect with bottom plate 2, and the two can be integrated for the ease of the installation of pressure limiting valve 4 Molding.Second air inlet 43 is connected to the first air inlet 21, and the two can be aligned, and the size of the second air inlet 43 is greater than the The size of one air inlet 21.Second gas outlet 44 is connected to by the inner space of main body 3 with the first gas outlet 11, and second goes out The size of port 44 is greater than the size of the first gas outlet 11, so that the exhaust gas in crankcase has cushion space.

In order to improve exhaust effect, optionally, the first gas outlet 11 be it is multiple, multiple first gas outlets 11 are evenly arranged on top plate On 1, so that crankcase waste gas can be discharged into atmosphere as early as possible by the first gas outlet 11, working efficiency is improved.

For the ease of the installation of cap, as shown in Figure 1, optionally, main body 3 is to be formed on cylindric and outer peripheral surface There is external screw thread, covers and can cover so that only main body 3 need to be screwed in valve cover, back-out when adding machine oil is easy to operate.

In order to guarantee the leakproofness of cap, as shown in Figure 1, optionally, sealing is arranged on the outer peripheral surface of main body 3 Circle 5 prevents lubricating oil leakage, guarantees sealing effect.

Another aspect of the present disclosure also provides a kind of engine, including engine cap recited above.

The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure Monotropic type, these simple variants belong to the protection scope of the disclosure.

It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can No further explanation will be given for the combination of energy.

In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally Disclosed thought equally should be considered as disclosure disclosure of that.

Claims (8)

1. a kind of engine cap, which is characterized in that including top plate (1), bottom plate (2), hollow main body (3) and pressure limiting Valve (4), the top plate (1) and the bottom plate (2) are connected to the both ends of the main body (3), are formed on the bottom plate (2) First air inlet (21) is formed with the first gas outlet (11) on the top plate (1), and the pressure limiting valve (4) is arranged in the main body (3) internal, for opening under the conditions of predetermined pressure to be connected to first air inlet (21) and first gas outlet (11).

2. engine cap according to claim 1, which is characterized in that the pressure limiting valve (4) is check valve.

3. engine cap according to claim 2, which is characterized in that the pressure limiting valve (4) includes valve body (41) and spool (42), the valve body (41) have the second air inlet (43) and the second gas outlet (44), spool (42) pressure On the inner face for leaning against second air inlet (43), when pressure is greater than standard atmospheric pressure at second air inlet (43), The spool (42) is opened, and second air inlet (43) is connected to second gas outlet (44).

4. engine cap according to claim 3, which is characterized in that the valve body (41) and the bottom plate (2) it connects, second air inlet (43) is connected to first air inlet (21), and second gas outlet (44) passes through described The inner space of main body (3) is connected to first gas outlet (11).

5. engine cap according to claim 4, which is characterized in that first gas outlet (11) is more A, multiple first gas outlets (11) are evenly arranged on the top plate (1).

6. engine cap according to claim 1, which is characterized in that the main body (3) is cylindric and outer External screw thread is formed on circumferential surface.

7. engine cap according to claim 6, which is characterized in that covered on the outer peripheral surface of the main body (3) Equipped with sealing ring (5).

8. a kind of engine, which is characterized in that including engine oil filler described according to claim 1 any one of -7 Lid.