CN2293653Y - Engine Lean Burn Assist - Google Patents

Abstract

An auxiliary device for lean combustion of engine is characterized by that an auxiliary device is added in the pipeline of positive crankcase ventilation system, said auxiliary device is equipped with trace channel and valve device in its self-body interior, wherein the micro passage is in a normal open state, guides micro air to directly enter the air inlet manifold, and dilutes the ventilation system of the positive crankcase to supply over-concentrated mixed gas; another valve device adjusts the introduction of a proper amount of air in response to the change in the pressure difference of the intake manifold; the micro passage promotes the pipeline between the intake manifold and the auxiliary device to be in a normally open state, the cross section of the valve device is instantly adjusted along with the change of the vacuum pressure difference of the intake manifold, a proper amount of air directly enters the intake manifold to dilute and supply rich mixed gas, the gas-oil mixture ratio is controlled to be close to the optimal ratio of 1: 14.7 before entering a combustion chamber, fuel oil is promoted to be completely combusted, and the combustion efficiency of an engine is effectively improved.

Description

Engine Lean Burn Assist

The utility model relates to an engine combustion device, in particular to an auxiliary device with the ability to regulate air directly entering the intake manifold, so that the oil-gas mixing ratio can be controlled in an optimal state before entering the combustion chamber.

When a general engine is circulating, there must be air running in the crankcase. The moisture and gasoline vapor in the crankcase must be taken away by a system, otherwise the moisture and gasoline vapor will generate flooding and acids in the crankcase. It will block the lubricating oil pipeline and corrode the metal; the moisture and gasoline vapor in the crankcase will be directly discharged into the air, which will cause air pollution; in order to prevent pollution problems, a leaky ventilation system is added in the crankcase. It is connected to the intake manifold through the conduit and enters the combustion chamber for combustion.

The crankcase introduces the air into the intake manifold through the conduit. If there is too much supply, the mixture ratio of oil and gas will be too thin and the operation will be poor; therefore, a positive crankcase ventilation valve is installed at the outlet end of the crankcase to adjust the passage of waste oil and gas. amount; the positive crankcase ventilation valve is adjusted in conjunction with the vacuum suction of the intake manifold, so that excessive waste oil and gas will not enter the intake manifold. This adjustment system is like the content of the US Patent No. 3,646,925.

When the engine is running, in order to prevent the shock situation caused by the too lean oil-air mixture ratio, the oil-air mixture ratio of the general engine is lower than 1:14.7. In the case of oversupply of the circuit system, especially when decelerating suddenly or closing the throttle valve to go downhill, because the outside air is blocked from entering the carburetor, and the oil circuit is still in the oil supply stage, the pressure in the intake manifold is in a high vacuum state. The combustion chamber produces a large amount of black smoke due to incomplete combustion.

The technology disclosed in the existing U.S. Patent No. 3,463,132 of the above situation solves the incomplete combustion situation caused by the intake manifold when decelerating rapidly or closing the throttle valve downhill; the technology uses a filter device to filter the positive crankcase The waste oil and gas introduced by the ventilation system, and then use the ball valve and spring in the valve body of a vacuum breaker valve, which will not operate under normal engine operation. Unless the vacuum of the intake manifold is too high, the breaker vacuum valve will not open; Under normal acceleration and deceleration conditions, when driving along a straight and flat road, the vacuum in the intake manifold will not be too high. The resulting high vacuum will have an effect on the vacuum breaker valve, open the ball valve to introduce external air, dilute the over-concentrated mixed gas, and prevent the discharge of a large amount of black smoke.

Although the above technology discloses that there is a passage in the center of the main valve body, the passage is provided with a spherical valve seat, which is supported by a spring on the surface of the spherical object to form a valve body with regulating function, but the vacuum breaker The valve does not move when the engine is running normally (at a mercury column height of 17 to 22 inches (432 to 559mm)), only when the vacuum value of the intake manifold is momentarily raised at 23 to 25 inches (584 to 635mm) of mercury The column height starts to generate action.

The main purpose of the auxiliary device provided by the utility model is to solve the situation that the mixing ratio between the oil circuit control system and the air supply is too thick caused by the instantaneous acceleration and deceleration of the oil circuit of the automobile engine, and to introduce an appropriate amount of air in a timely manner to dilute the excessive supply. The rich mixture allows the fuel-air mixture ratio to be controlled close to the ideal 1:14.7 before entering the combustion chamber, which promotes the complete combustion of the fuel and effectively improves the combustion efficiency of the engine.

The secondary purpose of the auxiliary device provided by the utility model is to use a group of trace passages supplying trace air to guide the trace air directly into the intake manifold, dilute the waste oil gas supplied by the positive crankcase ventilation system, and promote the intake manifold. The pipeline between the air manifold and the auxiliary device is kept in a normal open state. With the change of the vacuum pressure difference of the intake manifold, the instantaneous pilot valve device produces an adjustment of the cross-sectional area, allowing an appropriate amount of air to directly enter the intake manifold to dilute Fuel mixture supplied too rich.

The secondary purpose of the auxiliary device provided by the utility model is to provide a smooth passage between the intake manifold and the auxiliary device by using the micro passage in the normally open state, regardless of the instantaneous change of low speed, high speed, refueling, starting or deceleration. In the case of excessive oil supply, according to the instantaneous change of the vacuum suction of the intake manifold, an appropriate amount of air can be instantly introduced into the intake manifold to reduce air pollution caused by an excessively high oil-air mixing ratio.

Another purpose of the auxiliary device provided by the utility model is that the pipeline between the intake manifold and the auxiliary device can supply the pressure in the intake manifold with the change of the vacuum pressure difference of the intake manifold through the normally open trace passage. This directly affects the valve unit, which regulates the amount of air required to dilute the supplied rich mixture.

With regard to the utility model, the illustration is as follows:

Fig. 1 is a sectional view of the utility model, showing the structure of the auxiliary device.

Fig. 2 is an exploded view of the components of the utility model.

Fig. 3 is a diagram of parts of the valve seat of the present invention, showing the situation that the valve surface is provided with trace passages.

Fig. 4 is a cross-sectional view of the present invention, showing the second embodiment of the trace channel.

An engine lean-burn auxiliary device, which is connected to the connection end of the engine intake manifold with a three-prong connecting pipe for connecting the pipeline of the positive crankcase ventilation system and the pipeline of the auxiliary device of the present invention; as shown in Figure 1 One end of the pipeline is connected to the pipe joint 42 of the auxiliary device 11, and the auxiliary device 11 is installed and fixed in an appropriate space on the outer edge of the engine; The device 16 and a group of trace passages 27 that guide the supply of trace air in a normally open state, when the engine is running normally, use the trace passage 27 to guide trace air directly into the intake manifold to dilute the waste gas supplied by the positive crankcase ventilation system. In addition to oil and gas, the pipeline between the intake manifold and the auxiliary device 11 is kept in a constant open state. With the change of the vacuum pressure difference of the intake manifold, the instantaneous pilot valve device 16 produces an adjustment of the cross-sectional area, so that an appropriate amount of The air directly enters the intake manifold to dilute and supply the over-rich mixture, so that the fuel-air mixture ratio is controlled close to the ideal 1:14.7 before entering the combustion chamber, which promotes the complete combustion of fuel and effectively improves the combustion efficiency of the engine.

Please refer to Fig. 1 to Fig. 3, the engine lean-burn auxiliary device 11 of the present utility model, it is to be provided with a columnar shell 56 on the outer edge of body 12, and this shell 56 center is provided with a cylinder 19, and this cylinder 19 and shell The body 56 is divided into several interval spaces 22 by a plurality of stencils 21; the inner edge of the cylindrical body 19 is provided with a positioning post 24 and a through hole 23, and the outer edge is provided with a screw thread 25 and a cylindrical surface 26 for a The valve device 16 is screwed into it; the body 12 is located at the outer edge of one end of the housing 56 and is provided with an external thread 17, and the port is sleeved with a leak-proof gasket 38 which is screwed together with the internal thread 41 of the upper cover 13; the upper cover 13 There are symmetrical pipe joints 42 on the outer edge of the pipe, one of which is a closed pipe joint, and a passage 43 is provided in the center of the other pipe joint. The pipe joint 42 with the passage 43 is connected to the three-prong pipe joint at the outer end of the intake manifold with a pipeline The body 12 is located at the outer edge of the other end of the housing 56 and is provided with an external thread 18, and the port is screwed with the internal thread 54 of the lower cover 14, and the filter device 15 is accommodated by the chamber 52 in the lower cover 14 as a filtered air for.

The valve device 16, which is screwed on the open port of the cylinder body 19, includes components such as a spring 31, a ball 32, an O-ring 33 and a valve seat 34, wherein the spring 31 is accommodated in the space of the cylindrical surface 20 of the cylinder body 19, One end is supported on the plane of the outer edge of the positioning column 24, and the other end is used for the support of the ball 32; the outer edge of the valve seat 34 is respectively provided with a ring groove 61 and a thread 60 for the positioning of the O-ring 33 and screwing on the cylindrical surface 20 On the screw thread 25 and the cylindrical surface 26 of the outer end.

The valve seat 34 of the valve device 16 is screwed on the thread 25 of the cylindrical surface 20. After the tension of the spring 31 is adjusted, in order to prevent consumers from arbitrarily adjusting the tension of the spring 31 and causing abnormal air supply, a preset positioning is used. The fixing plate 44 of the post 45 and the round hole 46 is buckled on the seat surface 30 of the outer edge of the valve device 16 , and the fixing plate 44 is provided with a round hole 46 for air circulation.

The valve seat 34 is located in the center with a post hole 37, one end of the post hole 37 is provided with a valve surface 36, and the other end is provided with a slot 62; , the ball 32 located in the cylindrical surface 20 is supported by the spring 31, and is closed by contacting the valve surface 36 of the valve seat 34. The tension of the spring 31 is controlled by the helix of the valve seat 34. Value height, adjusts the tightness of spring 31.

The valve device 16 is to introduce an appropriate amount of air into the intake manifold at the moment when the engine is in normal operation and in different road driving conditions according to the pressure difference of the intake manifold. Therefore, the valve on the valve seat 34 At least one ventilation groove 58 is provided on the surface 36, and when the ball 32 and the valve surface 36 are in a close state, a small amount of air is guided into the intake manifold with a trace passage 27, so as to promote the air intake manifold and the auxiliary device 11. The pipeline maintains a normal open path.

When the engine is running normally, the pressure difference in the intake manifold changes with different road conditions. At idle speed (throttle valve is fully closed), the vacuum suction in the intake manifold is about 432 to 559mm of mercury column height; when throttle When the valve is fully opened, the vacuum suction in the intake manifold will be reduced to a mercury column height of 100mm or below; It has to rise to a height of 584 to 635mm mercury column.

When the operation between the ball 32 and the valve seat 34 of the regulating valve device 16 is normal and stable, the opening point between the ball 32 and the valve seat 34 is adjusted in advance to an appropriate position of mercury column height (such as 100mm mercury column height as a benchmark), the When the vacuum value of the intake manifold is higher than the height of 100mm mercury column, the ball 32 and the valve seat 34 will act to introduce appropriate air directly into the intake manifold; when the vacuum value of the intake manifold is lower than 100mm mercury column When the column is high, the ball 32 and the valve face 36 are in a closed state, and the trace air is guided by the trace passage 27 of the air groove 58 directly into the intake manifold to dilute the waste oil gas introduced by the regulating valve of the positive crankcase ventilation system.

The vent groove 58 arranged on the valve surface 36, as long as the engine is running normally, will introduce external air directly into the intake manifold to form a smooth passage. When the vacuum value of the intake manifold changes, the In addition to supplying an appropriate amount of mixed gas through the passage of the oiler, the positive crankcase ventilation system also controls the amount of waste oil and gas introduced; when the vacuum value of the intake manifold is higher than 100 mm of mercury column height, the ball 32 of the valve device 16 is pulled open, and then The cross-sectional area between the ball 32 and the valve surface 36 is adjusted according to the vacuum value of the intake manifold to guide a proper amount of air into the intake manifold.

The valve device 16 is located on the valve surface 36 and is provided with at least one ventilation groove 58. When the vacuum value of the intake manifold is lower than 100 mm of mercury column height, a small amount of air is directly introduced into the intake manifold through the pipeline in a normally open state to dilute the positive crank. The tank ventilation system introduces the waste oil gas in the intake manifold; the trace passage 27 provides a smooth passage for the pipeline between the auxiliary device 11 and the intake manifold, and as the vacuum pressure difference of the intake manifold changes, the ball 32 The cross-sectional area between the valve surface 36 and the valve face 36 is adjusted according to the change of the vacuum value, without any hysteresis, so that an appropriate amount of external air is directly introduced into the intake manifold to help the combustion of the engine.

The utility model is located in the trace passage 27 provided by the valve device 16, except that the valve surface 36 of the valve seat 34 is provided with at least one venting groove 58, as shown in Figure 4, one is between the cylinder 19 cylindrical surface 20 port and the shell The position of the flat plate 57 between the body 56 is provided with a small hole 29 through which the function of the small hole 29 and at least one ventilation groove 58 provided on the valve surface 36 is the same; in the normally open state, a small amount of air is directly introduced into the intake air through the pipeline. In the manifold, dilute the waste oil gas introduced into the intake manifold by the positive crankcase ventilation system, and the air volume required when the vacuum suction in the intake manifold is lower than the mercury column height of 100mm or below, and promote the intake manifold to the auxiliary device The pipeline between 11, with the increase and change of the vacuum pressure difference of the intake manifold, the adjustment between the ball 32 and the valve surface 36 of the pilot valve device 16 is instantaneously adjusted, so that an appropriate amount of air directly enters the intake manifold to dilute the supply. The over-rich mixture allows the fuel-air mixture ratio to be controlled close to the ideal 1:14.7 before entering the combustion chamber, reducing the generation of exhaust gases such as HC and CO.

The utility model adds a group of micro passages 27 in a normally open state to the structure other than the valve device 16. Although the structure of the spring 31, the ball 32 and the valve surface 36 of the valve device 16 has been widely used, it belongs to the common technology, but Because the pipeline of the positive crankcase ventilation system belongs to the equipment of the original vehicle, the length of the pipeline and the space around the original vehicle are limited and the principle of not destroying the equipment of the original vehicle, the auxiliary device 11 of the utility model uses a pipeline of an appropriate length It is connected to the trident connecting pipe at the connecting end of the intake manifold, and is properly installed and fixed at an appropriate position on the outer edge of the engine; the opening between the ball 32 of the valve device 16 and the valve surface 36, along with the setting of the micro passage 27, is When the vacuum suction of the intake manifold is adjusted to be lower than the height of the mercury column below 100mm, an appropriate amount of outside air is guided into the intake manifold; the trace channel 27 provides a smooth passage at the same time, and the vacuum suction of the intake manifold is high. When the mercury column height is above 100 mm, the cross-sectional area between the ball 32 and the valve surface 36 changes with the pressure difference of the intake manifold as it is opened and adjusted, without any hysteresis.

The utility model is respectively explained by the above-mentioned embodiments, which fully reveals the characteristics and structural relationship of the utility model, and it is obvious that the case has been significantly improved, and after the actual vehicle test, it is confirmed that the utility model is indeed equipped with a trace passage. It can effectively reduce the generation of exhaust gas and increase the combustion efficiency of the engine. It is an invention that is not foreseen by the industry and can be easily achieved. The structure also has its originality.

Claims (3)

1. An engine lean-burn auxiliary device, which is mainly composed of a body, a lower cover, a filter device, a valve device and other components, wherein the outer edge of the body is a cylindrical shell, and a cylinder for the valve device to be screwed is arranged in the center Body, the upper end of the body is screwed to the upper cover, the outer end of the upper cover is connected to the joint outside the intake manifold by a pipe joint, and the lower end of the body is screwed to a lower cover provided with a filter device; The valve device includes a spring, a ball, an O-ring and a valve seat. The spring is accommodated in the cylindrical space of the cylinder, and one end is supported on the outer edge plane of the positioning column, and the other end is used for the support of the ball; the outer surface of the valve seat The edge is provided with a ring groove and a thread for the O-ring to be positioned and screwed to the thread and the cylinder at the outer end of the cylinder; It is characterized in that the auxiliary device is located inside the main body and is provided with a valve device and a micro passage, wherein the valve device is provided with a spherical valve surface on the inner edge of the valve seat, the spherical valve surface is in contact with the spherical surface of the ball, and the other end of the ball is supported by a spring. Hold, at least one ventilation groove is provided on the spherical valve surface of the valve seat. When the ball and the valve surface of the valve seat are in a tight state, a trace channel is used to guide a trace amount of air into the intake manifold, so that the intake air The pipeline between the manifold and the auxiliary device maintains a normally open state. The flow cross-sectional area between the spherical valve surface of the valve device and the spherical surface of the ball changes with the moment of the vacuum pressure difference of the intake manifold, and is determined by the normally open state. The micro-channel guides the circulating airflow, which promotes the smooth adjustment of the cross-sectional area between the ball and the valve surface, and supplies an appropriate amount of air directly into the intake manifold, diluting and supplying an over-rich mixture. 2. The engine lean-burn auxiliary device according to claim 1, wherein the valve device and the trace passage provided by the auxiliary device, one is that at least one ventilation groove is provided on the valve seat of the valve device, When the ball and the valve surface are in a tight state, a micro-channel is formed between the spherical surface and the air groove, and the micro-channel is in a normally open state for a small amount of air to be directly introduced into the intake manifold through the pipeline. 3. The lean-burn auxiliary device for engines according to claim 1, wherein the valve device and the trace channel provided by the auxiliary device are, one is that the valve device is screwed on the cylinder, and the shell located at the outer edge of the body There is a flat plate between the body and the barrel, and a small through-hole is set at the appropriate position of the plate to form a micro passage, which is in a normally open state for a small amount of air to be directly introduced into the intake manifold through the pipeline.

Images