CN2220538Y

CN2220538Y - Crankcase vacuum controlled blowing air leak recovery device

Info

Publication number: CN2220538Y
Application number: CN 94238108
Authority: CN
Inventors: 陈捷
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-26
Filing date: 1994-08-26
Publication date: 1996-02-21
Anticipated expiration: 2004-08-26

Abstract

The utility model relates to a blowing and air-leaking recovery device for a crankcase controlled by vacuum. The device is characterized in that the crankcase is completely sealed except a passage to an air inlet manifold and a vacuum pressure controller for the crankcase composed of a seat body (15) and a top cover (8) is arranged at the middle of the passage to the air inlet manifold; after combination, two valve chambers are formed at the inner part and each valve chamber is provided with a group of diaphragm valves to respectively control low-speed and high-speed operation; the lower part of the seat body is provided with two pipelines, an upper pipeline for an air inlet pipeline connected with the crankcase and a lower pipeline (18) for an air outlet pipeline connected with the air inlet manifold (3).

Description

The gas leakage recovering device is blown in crankcase depression control

The utility model relates to generation vacuum in the crankcase that makes four-journey engine, reclaims control and blows the device of gas leakage.

At present, in any case the manufacturing of car engine is accurate, no matter it is new and old, absolutely notly between cylinder wall and piston ring accomplish complete driving fit, so four-journey engine is in the stroke of compression and outburst, portion gas in the firing chamber can be via in the crankcase that bleeds between cylinder wall and piston ring, and these gases in crankcases of bleeding are called and blow gas leakage.Blow that Main Ingredients and Appearance is nitrogen, oxygen, carbon dioxide in the gas leakage, some harmful gas also simultaneously, as carbon monoxide, hydrocarbon, oxynitrides and other harmful matters.These harmful gases enter in the atmosphere, can cause serious atmospheric pollution, and therefore, national governments stipulate that all automobile must install Positive crankcase ventilation, i.e. the PCV system.The PCV system, crankcase has two ventilation ducts, and one leads to intake manifold, and another leads to air-strainer, connects the PCV valve in leading to the pipeline of intake manifold.When the engine low-speed running, air-distributor vacuum is strong, it is few to blow air leakage, so fresh air enters crankcase from air-strainer, when engine runs up, a little less than the air-distributor vacuum, blowing air leakage heightens, blow the wash with watercolours that leaks gas nowhere in the crankcase in a large number and let out, just can enter gas handling system, so that blow in the unlikely atmosphere that bleeds of gas leakage by the pipeline that connects air-strainer.

Though the PCV system can make and blow gas leakage and do not bleed in the atmosphere, causes following puzzlement:

1, blowing gas leakage, to be trapped in the crankcase time oversize, mixes desaturation and the deterioration that causes machine oil with machine oil easily, shortened the working life of machine oil.

2, can produce corrosive carbonic acid thing and sludge in the machine oil of deterioration, cause insufficient lubrication, and damage the engine parts.

3, the PCV system can cause mixed gas too rare by sucking a large amount of fresh airs in the crankcase when the engine low-speed running.When running up, blow the gas leakage adverse current to air-strainer, the mixed gas when making air inlet is too dense.Too rare or too dense mixed gas all can cause horsepower to reduce, and exhaust contaminant increases, and waste fuel.

4, blowing has gas after 70%-80% the burning in the gas leakage, be trapped in the crankcase, causes oil temperature too high, reduces lubricated effect.

The purpose of this utility model provides a kind of control system that four-journey engine blows gas leakage that solves; adopt the crankcase of complete closed; can solve the problem that gas leakage escapes of blowing more up hill and dale than the PCV system; make full use of the gas heat energy and the incendivity energy that blow in the gas leakage; overcome engine blows the oil gas overrich that causes of gas leakage when heavy load turns round phenomenon; overcome and blowing gas leakage and be stranded in the oil pollution that is caused in the crankcase; promote the horsepower of engine; the consumption of fuel saving; prolong the working life of machine oil and engine; simplify the design of engine, and can make exhaust cleaner, meet the requirement of world environments protection.

Technical solution of the present utility model is on the basis of the four-journey engine system of prior art, promptly at air-strainer, Carburetor, intake manifold, piston, cylinder, on the basis of firing chamber, overthrow the design of the employed crankcase ventilation of PCV system, the mode that changes the employing crankcase depression solves blows the puzzlement that gas leakage produces, so crankcase of the present utility model is except that leaving complete closed towards the path of intake manifold, be vacuum state during engine running in the crankcase, all blows gas leakage all being inhaled toward intake manifold rapidly in a flash of taking place, and more can solve than the PCV system and blow the various pollutions that gas leakage causes.

Crankcase of the present utility model leads in the pipeline of intake manifold, connects a crankcase depression controller, is used for controlling the pressure in the crankcase and blowing the yield of gas leakage, controls the flow that blows gas leakage by the crankcase depression pressure controller during engine running.The crankcase depression pressure controller comprises that pedestal, loam cake constitute, and two empty chambers of inner formation, combination back are respectively the idling valve box and quicken the valve box.In two valve boxs identical diaphragm valve sets is arranged all, the diaphragm valve sets is made up of diaphragm, pad, valve lever, spring, screw, and two valve box's bottom center all have the valve hole.Two pipelines are arranged at the pedestal bottom, and last pipeline is an admission line, is connected with crankcase, and following pipeline is an outlet pipe, are connected with intake manifold, and last pipeline has two holes to communicate with following pipeline, and this two hole and two valve holes are respectively on same center line.All there is identical diaphragm valve sets two valve boxs, and the diaphragm valve sets is made up of diaphragm, pad, valve lever, spring, screw.Diaphragm is fixed between lid and the pedestal, and screw is fixed in pad, valve lever on the diaphragm.Spring is positioned at the valve lever periphery, and one with pedestal valve hole around join, the other end presses closer diaphragm.Valve lever one end passes the valve hole and is positioned at pipeline.In the acceleration valve box, be stamped a vacuum pressure hole, connect the vacuum advance signal that vacuum firing shifts to an earlier date, can quicken to blow the recovery of gas leakage when making the running of high speed heavy load.The action principle of diaphragm group is when engine running, intake manifold produces vacuum negative pressure, the diaphragm group is pulled down, valve opening degree is little, makes that to blow the gas leakage yield little, and closure is opened greatly when quickening, the air-distributor vacuum negative pressure dies down, the diaphragm group is pushed up on the spring, and valve opening degree is big, make blow gas leakage yield big.

Working principle of the present utility model is when engine running, the vacuum negative pressure of intake manifold makes and is vacuum state in the crankcase, when blowing the gas leakage generation, is inhaled toward intake manifold rapidly, the flow of gas leakage is blown in control through the crankcase depression controller, sends intake manifold desaturation mixed gas back to.Because blow the combustible gas gas that has 20%-30% compression stroke to produce in the gas leakage, and gas after the combustion of 70%-80% outburst stroke generation, not only having in these gases can be for the energy of burning, the heat energy that can improve combustion efficiency is more arranged, if can in addition suitable recovery and control, the best that just can become the empty combustion gas of desaturation be originated.No matter the utility model engine speed height, the yield that blows gas leakage all can carry out synchronously with engine running, and it is few that the engine load hour blows the gas leakage generating capacity, and engine is required, and to blow gas leakage also less, by the crankcase depression controller to blow gas leakage less.Load when big when engine, it is many to blow air leakage, and engine is required, and to blow gas leakage also more, by the crankcase depression controller to blow gas leakage also more.The generating capacity that blows gas leakage is directly proportional with the requirement of engine forever.And under the vacuum of crankcase, blow gas leakage and can both fully and rapidly reclaim forever.Like this owing to blow the recovery of gas leakage, the fuel delivery of oil supply system can be directly proportional with the yield that blows gas leakage, overcome the PCV system when the high speed heavy load turns round, blow the gas leakage adverse current to oil supply system, cause proportions of ingredients too dense, after these burnings of 70%-80% of blowing in the gas leakage to be contained high-temperature gas not only its heat energy almost completely waste, adverse current is to oil supply system, cause temperature rising in the oil supply system, and blown gas leakage and pollute, shorten the working life of oil supply system.

The crankcase depression controller is the vacuum negative pressure that is used for controlling in the crankcase, and low speed control valve during two groups of diaphragm type control valves are respectively also is the valve of idling valve box, and quickens control valve, promptly quickens the valve of valve box.When engine start, the air-distributor vacuum negative pressure is strong, it is few to blow the gas leakage generating capacity, two groups of diaphragms of crankcase depression controller are all drop-down by suction, quicken control valve and close fully this moment, blow gas leakage and can only flow to intake manifold via middle low speed control valve, when engine quickens, the vacuum negative pressure diminuendo in the intake manifold, it is cumulative to blow air leakage, diaphragm is pushed away on the spring, two groups of control valves are all opened, and the vacuum pressure that the flexible pipe that is shifted to an earlier date by vacuum firing simultaneously transmits is cumulative, make the diaphragm that quickens control valve along with the vacuum signal that quickens rises, the opening of valve is increased, quicken to blow the yield of gas leakage.Blow the flow of gas leakage through the control of crankcase vacuum controller, mixed gas flow in the intake manifold not only is directly proportional with the yield that blows gas leakage, more can under the situation of engine high speed heavy load, quicken to reclaim a large amount of gas leakage of blowing, required for engine, the empty combustion gas of the desaturation of timely and appropriate discovery, and reclaim the insurmountable for a long time problem of blowing gas leakage fully and rapidly.

The utility model has the advantages that, at first be the horsepower that has strengthened engine accordingly, this is owing to be the vacuum negative pressure state in the crankcase, pressure difference in firing chamber and the crankcase increases, when the outburst stroke, internal pressure of combustion chamber is identical with the chamber pressure of using the PCV system, but crankcase of the present utility model is vacuum state, the PCV system then is a barometric pressure, so the utility model is in the stroke of engine outburst, the downward thrust of piston increases naturally, and the pressure difference with in turbosupercharging engine increase firing chamber and the crankcase strengthens the theoretical similar of engine horsepower, only turbo charge system is to increase internal pressure of combustion chamber, the utility model is to reduce crankcase pressure, but the both has increased the pressure difference in firing chamber and the crankcase, so engine horsepower strengthens.Also owing to blow gas after 70%-80% the burning arranged in the gas leakage, in the utility model, reclaimed rapidly, gas heat energy is difficult for absorbing for each parts of engine internal, in intake manifold, mix with mixed gas, so intake temperature raises, rapider when burning, improve combustion efficiency and also strengthened engine instantaneous burst power.Also because under the state of crankcase depression, the recovery of blowing gas leakage is forever consistent with the running of engine, the puzzlement that has thoroughly solved PCV system oil gas overrich when the high speed heavy load.

Two of advantage is to have saved fuel consumption, and this is because blow and 20%-30% combustible gas gas is arranged approximately in the gas leakage under the various operational situations of engine, all can timely and appropriate discovery and reclaim fully and utilize.Also be that combustion efficiency improves, so can use more approaching theory to mix the weak mixture of ratio, the consumption of fuel saving because blow and have gas heat energy after 70%-80% the burning to be used for the lifting of mixture temperature in the gas leakage.

Three of advantage is prolongation machine oil working life, has protected engine.This is because the interior vacuum of crankcase; blow gas leakage when taking place; just be inhaled into intake manifold rapidly; be not easy to mix with machine oil; so machine oil is not perishable; can not cause simultaneously oil temperature to raise because of the temperature of blowing gas leakage itself yet, and make lubrication effect bad, so just can reach the purpose of protection engine.

Four of advantage is to have simplified engine apparatus.This is to improve combustion efficiency because of having made full use of the heat energy that blows gas leakage, so do not need to improve intake temperature with the EGR exhaust gas recycling system again, native system can replace PCV system all functions fully in addition, so simplified the equipment of engine.

Five of advantage is to have met environmental requirement, and this is to reclaim fully with under the extraneous vacuum state that seals owing to blowing gas leakage, fuel consumption minimizing in addition, and combustion efficiency improves, and exhaust is clean.

Below in conjunction with accompanying drawing embodiment of the present utility model is described:

Fig. 1 organigram of the present utility model;

Fig. 2 crankcase depression controller of the present utility model profile construction schematic representation;

Fig. 3 crankcase depression controller of the present utility model decomposes organigram;

Fig. 4 PCV Positive crankcase ventilation structure and working principle reference view.

Shown in Fig. 1,2,3,4, the utility model is on the basis of four-journey engine system, promptly on the basis of air-strainer (1), Carburetor (2), intake manifold (3), crankcase (4), piston (5), cylinder (6), firing chamber (7), crankcase of the present utility model (4) is except that leaving complete closed towards the path of intake manifold (3).Lead to connection crankcase depression controller in the pipeline of intake manifold (3) at crankcase (4), the crankcase depression controller comprises pedestal (15), loam cake (8) constitutes, two empty chambers of inner formation, combination back, be respectively the idling valve box and quicken the valve box, two valve box's bottom center all have the valve hole, two pipelines are arranged at pedestal (15) bottom, last pipeline (17) is an admission line, is connected with crankcase (4), and following pipeline (18) is an outlet pipe, be connected with intake manifold (3), last pipeline (17) has two holes to communicate with following pipeline (18), and this two hole and two valve holes are respectively at same center line, and all there is identical diaphragm valve sets two valve boxs, the diaphragm valve sets is by diaphragm (11), pad (10) and (12), valve lever (14), spring (13), screw (9) is formed.Diaphragm (11) is fixed between lid (8) and the pedestal (15), screw (9) is with pad (10) and (12), valve lever (14) is fixed on the diaphragm (11), spring (13) is positioned at valve lever (14) periphery, and one with pedestal (15) valve hole around join, the other end presses closer diaphragm (11), and valve lever (14) one ends pass the valve hole and are positioned at pipeline (17), is stamped a vacuum pressure hole (11) in the acceleration valve box.

Claims

1, the gas leakage recovering device is blown in crankcase depression control, be applicable to all four-journey engines, comprise air-strainer (1), Carburetor (2), intake manifold (3), piston (5), cylinder (6), firing chamber (7) constitutes, it is characterized in that crankcase (4) except that leaving complete closed towards the path of intake manifold (3), in leading to the pipeline of intake manifold (3), be connected with the crankcase depression controller, the crankcase depression controller includes pedestal (15), loam cake (8) constitutes, two empty chambers of inner formation, combination back, be respectively the idling valve box and quicken the valve box, two valve box's bottom center all have the valve hole, two pipelines are arranged at pedestal (15) bottom, last pipeline (17) is an admission line, be connected with crankcase (4), following pipeline (18) is an outlet pipe, be connected with intake manifold (3), last pipeline (17) has two holes to communicate with following pipeline (18), this two hole and two valve holes are respectively on same center line, all there is identical diaphragm valve sets two valve boxs, the diaphragm valve sets is by diaphragm (11), pad (10) and (12), valve lever (14), spring (13), screw (9) is formed, diaphragm (11) is fixed between lid (8) and the pedestal (15), screw (9) is with pad (10) and (12), valve lever (14) is fixed on the diaphragm (11), spring (13) is positioned at valve lever (14) periphery, and one with pedestal (15) valve hole around join, the other end presses closer diaphragm (11), valve lever (14) one ends pass the valve hole and are positioned at pipeline (17), are stamped a vacuum pressure hole (16) in the acceleration valve box.