CN200982215Y

CN200982215Y - Closed type crank box forced ventilation pipe for internal combustion engine

Info

Publication number: CN200982215Y
Application number: CN 200620016981
Authority: CN
Inventors: 万继征; 柴领道
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2006-07-12
Filing date: 2006-07-12
Publication date: 2007-11-28
Anticipated expiration: 2016-07-12

Abstract

The utility model discloses a combustion engine closed crankcase forced-ventilation pipeline which comprises the air inlet system and the air outlet system, wherein the air inlet system is equipped with an air inlet pipe and an air inlet passage communicate with the internal cavity of the crankcase. The top of the crankcase is positioned with a cylinder cover, with the air inlet passage formed with the cavity between the external wall of the cylinder cover and the internal wall of the cylinder hood for the cylinder cover. One end of the air inlet pipe communicates with the air filter, wherein the air filter communicates with the combustion engine intake manifold, and the other end of the air inlet pipe passes through the cylinder hood and communicates with the inlet passage; the air outlet system is positioned with the outlet pipe and the outlet passage communicating with the cavity of the crankcase; one end of the outlet pipe communicates with the intake manifold, with the air outlet passage formed with another cavity, in contrast with the inlet passage, between the external wall of the cylinder cover and the internal wall of the cylinder hood for the cylinder cover. The outlet pipe passes through the cylinder hood and communicates with the outlet passage. The ventilation pipe is reasonably laid out and convenient for maintenance.

Description

Closed crankcase forced ventilation pipe of Internal combustion engine

Technical field

The utility model relates to a kind of crankcase ventilation pipeline of internal-combustion engine, relates in particular to a kind of Closed crankcase forced ventilation pipe of Internal combustion engine that is easy to piping layout and maintenance.

Background technique

Motor is when work, and some inflammable mixture and waste gas are in vent piston drains to crankcase; Leak into and make machine oil thinning after gasoline vapor in the inflammable mixture in the crankcase condenses, performance depreciation; Waste gas contains water vapour and sulfur dioxide; The water vapour formation foam that condenses in gasoline destroys the supply of machine oil, and this phenomenon is particularly serious in the winter time.Sulfur dioxide is met water and is generated sulphurous acid, and sulphurous acid oxidation in air generates sulfuric acid.These acidic materials appear in the lubricating system, even a spot of part that also can make is corroded.For prolonging the machine oil life time, the wearing and tearing of the part of reducing friction and corrosion prevent engine oil leakage, and motor all needs to keep ventilating.In addition because mixed gas and waste gas enter in the crankcase, and crankcase pressure increases, machine oil will ooze out and run off from oil sealing, liner etc., and current have two kinds of draft types: the one, and natural ventilation, the 2nd, forced ventilation; Natural ventilation is that waste gas and inflammable mixture directly are discharged in the air, can cause certain pollution to environment like this, and therefore modern motor generally all is to adopt forced ventilation.The burning mixture of scurrying in the crankcase can be recycled like this, also help the Economy that improves motor.Current most of forced ventilation, its piping layout is as shown in Figure 1; By pipeline 1 ' with inflammable mixture and waste gas from the crankcase sucking-off, make it with filter through air-strainer 4 ' after fresh air mix after, enter in the engine air inlet tube 5 ', burn thereby enter in the cylinder, one-way valve 3 ' is installed between suction tude 5 ' and pipeline 1 ' regulates air inflow.And the inlet 2 ' of fresh air on valve mechanism cover 6 ' enters into motor waste gas and inflammable mixture are pressed into to pipeline 1 ', thereby finish whole forced ventilation process; But because the pipeline between crankcase and the suction tude is long, be not easy to arrange, and all multifactor restrictions such as the mixing quality problem of mixed gas and fresh air and dismounting, some inconvenience brought to production; This inconvenience become those skilled in the art an anxious technical problem to be solved.

The model utility content

Technical problem underlying to be solved in the utility model provides a kind of Closed crankcase forced ventilation pipe of Internal combustion engine that is easy to piping layout and maintenance.

For solving the problems of the technologies described above, the utility model provides a kind of Closed crankcase forced ventilation pipe of Internal combustion engine, be provided with gas handling system and the system of giving vent to anger, wherein: gas handling system is provided with an admission line and one and the gas-entered passageway that connects of crankcase intracavity, the top of this crankcase is provided with cylinder head, the outer wall of this cylinder head and and the inwall of the valve mechanism cover of this cylinder head of cover cap between folded part cavity form above-mentioned gas-entered passageway, one end of this admission line is communicated with air-strainer, this air-strainer is communicated with an intake manifold, the other end of this admission line runs through this valve mechanism cover, is communicated with this gas-entered passageway; The system of giving vent to anger is provided with an outlet pipe, one end of this outlet pipe is communicated with this intake manifold, this system of giving vent to anger also is provided with the outlet passageway that a crankcase intracavity connects, another part cavity with respect to forming described gas-entered passageway folded between the outer wall of this cylinder head and the inwall of valve mechanism cover forms above-mentioned outlet passageway, and this outlet pipe runs through described valve mechanism cover and is communicated with this outlet passageway.

On the said structure basis, wherein:

Described gas-entered passageway and described outlet passageway separate.

Described outlet pipe is provided with one-way valve.

Described outlet pipe is provided with gas diverter at the end place that it is communicated with described intake manifold, and this gas diverter is communicated with described intake manifold.

Compared to prior art, Closed crankcase forced ventilation pipe of Internal combustion engine of the present utility model, be provided with the outlet passageway that the inner chamber with crankcase connects by means of the system of giving vent to anger, another part cavity with respect to forming described gas-entered passageway folded between the outer wall of cylinder head and the inwall of valve mechanism cover forms this outlet passageway, outlet pipe runs through valve mechanism cover and is communicated with this outlet passageway, it is more reasonable that line arrangement is got, convenient maintenance; In addition, at the gas diverter that its end place that is communicated with intake manifold is provided with, make the fuel-air mixture that enters the firing chamber more even, improved the combustion efficiency of loop gas by this outlet pipe.

Description of drawings

For convenience of explanation, the utility model uses following preferred embodiment and accompanying drawing to do to describe in detail:

Fig. 1 is a prior art engine crankcase ventilation simplified schematic diagram;

Fig. 2 is the pipeline simplified schematic diagram of a kind of mode of execution of the utility model Closed crankcase forced ventilation pipe of Internal combustion engine;

Fig. 3 is the local pipeline simplified schematic diagram (comprising one-way valve 3, intake manifold 5, three-way pipe 7) of Fig. 2, and the visual angle of Fig. 3 is the left apparent direction of Fig. 2.

Embodiment

Below in conjunction with accompanying drawing 2 and accompanying drawing 3, embodiment of the present utility model is elaborated;

Among the embodiment of the present utility model, be provided with gas handling system and the system of giving vent to anger, wherein: the gas-entered passageway 10 that gas handling system is provided with admission line 2 and connects with crankcase intracavity, the top of this crankcase is provided with cylinder head 8, part cavity folded between the inwall of the valve mechanism cover 6 of this cylinder head 8 of the outer wall of this cylinder head 8 and cover cap forms above-mentioned gas-entered passageway 10, one end of this admission line 2 is communicated with air-strainer 4, this air-strainer 4 is communicated with inlet manifold of IC engine 5, the other end of this admission line 2 runs through this valve mechanism cover 6, is communicated with this gas-entered passageway 10; The system of giving vent to anger is provided with outlet pipe 1, one end of this outlet pipe 1 is communicated with this intake manifold 5, this system of giving vent to anger also is provided with the outlet passageway 11 that crankcase intracavity connects, another part cavity with respect to forming described gas-entered passageway folded between the inwall of the outer wall of this cylinder head 8 and valve mechanism cover 6 forms above-mentioned outlet passageway 11, this outlet pipe 1 runs through described valve mechanism cover 6 and is communicated with this outlet passageway 11, and this outlet passageway and above-mentioned gas-entered passageway separate.This outlet pipe 1 is provided with one-way valve 3, this outlet pipe 1 is provided with gas diverter at the end place that it is communicated with described intake manifold simultaneously, this gas diverter can be a three-way pipe 7, two air outlets of three-way pipe 7 are communicated with symmetrically arranged first steam outlet pipe 11 and second steam outlet pipe 12 respectively, first steam outlet pipe 11 connects

air intake branch

51,52, second steam outlet pipe 12 connects

air intake branch

53,54, the first steam outlet pipes 11 and second steam outlet pipe 12 is socketed with metallic pipe coupling 101,102; First steam outlet pipe 11 and second steam outlet pipe 12 are divided mixed gas equally and are outputed to four

air intake branches

51,52,53,54; Four

air intake branches

51,52,53,54 are delivered to intake manifold 5 with mixed gas.

Be furnished with the utility model pipeline crankcase in, flow into gas-entered passageway 10 through air-strainer 4 filtered airs via admission line 2, enter crankcase 9 through gas-entered passageway 10 again, be mixed into mixed gas with oil gas and waste gas in the crankcase 9, flow into outlet pipe 1 along outlet passageway 11 under the vacuum draw effect of this mixed gas pipeline in induction system of internal combustion engine, when this mixed gas is flowed through one-way valve 3, one-way valve 3 is regulating according to the operating mode of motor automatically, when the throttle opening of one-way valve 3 hour, crankcase output mixed gas is few; When the throttle opening of one-way valve 3 was big, crankcase output mixed gas was many, to regulate the gas pressure in the crankcase 9; Mixed gas is shunted mixed gas by three-way pipe 7 behind one-way valve 3 again, along mixed gas first steam outlet pipe 11 that is symmetrically distributed in three-way pipe about 7 and 12 outputs of second steam outlet pipe; On first steam outlet pipe, 11 sockets, first metallic pipe coupling, 101, the second steam outlet pipes, 12 sockets, second metallic pipe coupling 102; The other end of first metallic pipe coupling 101 is communicated to first air intake branch 51 and second air intake branch 52 by a triplate line structure (not shown), makes the mixed gas from first steam outlet pipe 11 be evenly distributed to first air intake branch 51 and second air intake branch 52; The other end of second metallic pipe coupling 102 is communicated with the 3rd air intake branch 53 and the 4th air intake branch 54 by a triplate line structure (not shown), makes the mixed gas from second steam outlet pipe 12 be evenly distributed to the 3rd air intake branch 53 and the 4th air intake branch 54;

Air intake branch

51,52,53,54 evenly is conveyed into the mixed gas that is assigned in the intake manifold 5 respectively, thereby assurance enters the uniformity of the mixed gas of firing chamber, with raising mixed gas burning quality and exhaust gas utilization rate, and then finish the whole circulation process; The top that all pipelines are arranged at crankcase makes whole system compact more, overhauls convenient.

In a word, because the utility model has adopted aforesaid line arrangement, pipeline is simplified more, be easier to produce and field-strip, and, because the setting of gas diverter can enter through intake manifold gas more equably and enters into cylinder combustion, has improved the combustion efficiency of loop gas.

Claims

1, a kind of Closed crankcase forced ventilation pipe of Internal combustion engine, be provided with gas handling system and the system of giving vent to anger, wherein: the gas-entered passageway that gas handling system is provided with admission line and connects with crankcase intracavity, the top of this crankcase is provided with cylinder head, the outer wall of this cylinder head and and the inwall of the valve mechanism cover of this cylinder head of cover cap between folded part cavity form above-mentioned gas-entered passageway, one end of this admission line is communicated with air-strainer, this air-strainer is communicated with inlet manifold of IC engine, the other end of this admission line runs through this valve mechanism cover, is communicated with this gas-entered passageway; The system of giving vent to anger is provided with outlet pipe, one end of this outlet pipe is communicated with this intake manifold, it is characterized in that: the described system of giving vent to anger also is provided with the outlet passageway that connects with crankcase intracavity, another part cavity with respect to forming described gas-entered passageway folded between the outer wall of described cylinder head and the inwall of valve mechanism cover forms above-mentioned outlet passageway, and described outlet pipe runs through described valve mechanism cover and is communicated with this outlet passageway.

2, Closed crankcase forced ventilation pipe of Internal combustion engine according to claim 1 is characterized in that: described gas-entered passageway and described outlet passageway separate.

3, Closed crankcase forced ventilation pipe of Internal combustion engine according to claim 1 and 2 is characterized in that: described outlet pipe is provided with one-way valve.

4, Closed crankcase forced ventilation pipe of Internal combustion engine according to claim 3 is characterized in that: described outlet pipe is provided with a gas diverter at the end place that it is communicated with described intake manifold, and this gas diverter is communicated with described intake manifold.