CN211258755U - Crankcase ventilation system on natural air suction engine - Google Patents

Abstract

A crankcase ventilation system on a naturally aspirated engine relates to a ventilation system. One end of the PCV valve is in threaded connection with the engine valve chamber cover; the other end of the PCV valve is detachably and fixedly connected with one end of the PCV pipe through a clamp, and the other end of the PCV pipe is detachably and fixedly connected with a PCV pipe connector nozzle of an engine intake manifold through another clamp. The utility model adopts the PCV pipe with the inner diameter of 9mm, which is larger than the inner diameter of the traditional pipeline, so as to be convenient for identifying the neglected loading or falling off of the pipeline; the PCV valve in the threaded connection type is adopted, so that the PCV valve is more firmly connected with the valve chamber housing of the engine, and the risk of accidental falling or neglected loading of the PCV valve is greatly reduced; the integrity of the PCV system is ensured to a greater extent, the emission regulation requirement of the sixth stage in China is met, the emission of harmful substances is reduced, the pollution to the atmosphere is reduced, and meanwhile, the arrangement mode also meets the diagnosis mechanism of an electronic injection system supplier.

Description

Crankcase ventilation system on natural air suction engine

Technical Field

The utility model relates to a ventilation system, especially a crankcase ventilation system on natural aspiration engine.

Background

In the prior art, the PCV valve 2 is connected with an engine valve chamber housing in an interference fit manner, so that the PCV valve 2 and the PCV pipe 1 fall off or are neglected to be installed, and once the PCV valve and the PCV pipe are frequently found out in time, air pollution is caused. In order to solve the problem and meet the requirement of the emission regulation of the sixth stage of China that the PCV system is detected and the integrity of the system is ensured in the production enterprises of vehicles using the PCV system, a crankcase ventilation system applied to the national sixth natural air intake engine needs to be designed urgently.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the background art, the utility model provides a crankcase ventilation system on natural aspiration engine.

The purpose is achieved, the utility model adopts the following technical proposal: a crankcase ventilation system on a naturally aspirated engine comprises a PCV tube, a PCV valve and two hoops; one end of the PCV valve is in threaded connection with an engine valve chamber cover; the other end of the PCV valve is detachably and fixedly connected with one end of the PCV pipe through a clamp, and the other end of the PCV pipe is detachably and fixedly connected with a PCV pipe connector nozzle of an engine intake manifold through another clamp.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model adopts the PCV pipe with the inner diameter of 9mm, which is larger than the inner diameter of the traditional pipeline, so as to be convenient for identifying the neglected loading or falling off of the pipeline; the PCV valve in the threaded connection type is adopted, so that the PCV valve is more firmly connected with the valve chamber housing of the engine, and the risk of accidental falling or neglected loading of the PCV valve is greatly reduced; the integrity of the PCV system is ensured to a greater extent, the emission regulation requirement of the sixth stage in China is met, the emission of harmful substances is reduced, the pollution to the atmosphere is reduced, and meanwhile, the arrangement mode also meets the diagnosis mechanism of an electronic injection system supplier.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

The first embodiment is as follows: as shown in fig. 2, the utility model discloses a crankcase ventilation system on a naturally aspirated engine, which comprises a PCV pipe 1, a PCV valve 2 and two clamps 5; one end of the PCV valve 2 is in threaded connection with the engine valve chamber cover 3, and compared with the traditional interference fit connection mode, the threaded connection is firmer; the other end of the PCV valve 2 is detachably and fixedly connected with one end of the PCV pipe 1 through a clamp 5, and the other end of the PCV pipe 1 is detachably and fixedly connected with a PCV pipe connector of an engine intake manifold 4 through another clamp 5.

The second embodiment is as follows: in this embodiment, the PCV pipe 1 is a rubber hose, which is further described with respect to the first embodiment.

The third concrete implementation mode: in this embodiment, the second embodiment is further explained, and the inner diameter of the PCV pipe 1 is 9 mm. The inner diameter of the PCV pipeline is larger than that of the original PCV pipeline, the PCV pipeline is fixedly connected with the PCV valve 2 through a clamp, once the pipeline of the PCV pipe 1 is neglected to be installed or falls off, a large amount of fresh gas flows into an engine intake manifold 4 under the action of pressure difference, and the vehicle-mounted diagnostic system can report faults according to the control strategy of an electronic fuel injection system supplier to the engine.

The utility model discloses the during operation, guaranteed PCV system's integrality as far as, in case PCV system part takes place to drop or the condition of neglected loading, according to the diagnostic strategy of electricity injection system supplier, on-vehicle diagnostic system can report trouble, and the suggestion driver in time inspects PCV system to can reduce the pollution that harmful substance discharge caused the atmosphere, also satisfy the requirement of china's sixth stage emission regulation simultaneously. On the basis of forced ventilation of the crankcase, the integrity of the crankcase system is ensured at the same time.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other forms of embodiment without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (3)

1. A crankcase ventilation system on a naturally aspirated engine, comprising a PCV tube (1) and a PCV valve (2), characterized in that: the ventilation system further comprises two clamps (5); one end of the PCV valve (2) is in threaded connection with an engine valve chamber cover (3); the other end of the PCV valve (2) is detachably and fixedly connected with one end of the PCV pipe (1) through a clamp (5), and the other end of the PCV pipe (1) is detachably and fixedly connected with a PCV pipe nozzle of an engine intake manifold (4) through another clamp (5).

2. A crankcase ventilation system on a naturally aspirated engine as set forth in claim 1 wherein: the PCV pipe (1) is a rubber hose.

3. A crankcase ventilation system on a naturally aspirated engine as set forth in claim 2 wherein: the inner diameter of the PCV pipe (1) is 9 mm.

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