WO2016106993A1 - Secondary air injection system of engine - Google Patents
Secondary air injection system of engine Download PDFInfo
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- WO2016106993A1 WO2016106993A1 PCT/CN2015/075711 CN2015075711W WO2016106993A1 WO 2016106993 A1 WO2016106993 A1 WO 2016106993A1 CN 2015075711 W CN2015075711 W CN 2015075711W WO 2016106993 A1 WO2016106993 A1 WO 2016106993A1
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- secondary air
- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
Definitions
- the utility model belongs to the technical field of internal combustion engines, and in particular relates to an engine secondary air injection system.
- the engine During the warm-up after the cold start of the supercharged engine, the engine is in an abnormal and unstable working state. Due to the low temperature of the engine cooling water and the low oil temperature, the fuel atomization and air mixing uniformity are poor, and the engine has misfire and incomplete combustion. Due to the heat absorption of the supercharger, the three-way catalytic converter can not quickly start to ignite, leading to high levels of emissions in the process, especially in the process of unburned HC emissions in the FTP (Federal Test Procedure) operating conditions About 70%. Therefore, how to solve the problem of serious emissions during the cold start of gasoline engines is an urgent problem to be solved.
- FTP Federal Test Procedure
- the pump type secondary air injection technology adopts a pump-controlled secondary air combination valve, and controls the opening of the air pressure difference between the secondary air jet pump and the secondary air combination valve.
- the valve body of the secondary air combination valve is opened, and an appropriate amount of compressed air is injected into the exhaust manifold.
- the use of the pressure difference to control the opening manner of the valve body due to the large pressure difference, is likely to cause a large opening of the valve body, and the compressed air injected is excessive.
- Another way is to use a vacuum tank to store the vacuum created by the cold start to create the intake manifold, but this approach still has the problem of how to achieve a reasonable pressure differential across the vacuum tank.
- the present invention provides a secondary air injection system by improving the exhaust system of the existing supercharged engine.
- An engine secondary air injection system includes a secondary air injection pump, a secondary air combination valve, a solenoid valve, a vacuum gas storage tank and a one-way valve; wherein the secondary air injection pump inlet is connected to the air cleaner, The outlet of the secondary air jet pump is connected with the inlet of the secondary air combination valve; the outlet of the secondary air combination valve is in communication with the exhaust manifold of the engine; one end of the solenoid valve is connected to the vacuum storage tank, and the other end is connected with the secondary air.
- the vacuum chamber of the combination valve is connected; the secondary air injection pump and the electromagnetic valve are respectively connected to the ECU and controlled by the ECU; the other end of the vacuum storage tank is connected to the intake manifold through the one-way valve so that the gas in the vacuum storage tank is only Flowing into the intake manifold; the volume of the vacuum reservoir is at least five times the volume of the vacuum chamber.
- the secondary air combination valve includes a valve body, a valve core, an air inlet, an air outlet, and a return spring, the valve body having a vacuum chamber therein; in an initial state, the spool is in the a position at which the air inlet is disconnected from the air passage of the air outlet; when the vacuum chamber is evacuated, the spool operation is in a state of communicating the air inlet with the air passage of the air outlet, And the return spring is deformed with the action of the spool to provide a restoring force for driving the spool back to an initial state.
- the return spring is a diaphragm spring and the diaphragm spring constitutes a part of the vacuum chamber.
- the engine secondary air injection system is mounted on a turbocharged engine.
- the secondary air combination valve used in the utility model has the advantages of simple structure and good differential pressure response sensitivity.
- FIG. 1 is a schematic structural view of a secondary air injection system according to an embodiment of the present invention.
- FIG. 2 is a perspective view of a secondary air combination valve according to an embodiment of the present invention.
- Figure 3 is a cross-sectional view of a secondary air combination valve of an embodiment of the present invention.
- the turbocharged engine secondary air injection system works specifically under the following two working conditions: starting Self-diagnosis after cold start and hot start.
- starting Self-diagnosis after cold start and hot start.
- it mainly refers to a technical improvement in the case of cold start of the engine.
- the intake port of the secondary air jet pump 4 is in communication with the air cleaner 8, and the air outlet of the secondary air jet pump 4 is connected to the intake port 203 of the secondary air combination valve 2;
- the air outlet port 204 of the air combination valve 2 is in communication with the exhaust manifold 1 of the engine; one end of the solenoid valve 3 is in communication with the vacuum gas storage tank 6, and the other end is connected to the vacuum chamber 206 of the secondary air combination valve 2 through the vacuum pumping tube 207;
- the secondary air injection pump 4 and the electromagnetic valve 3 are respectively connected to the ECU 9 and controlled by the ECU 9; the other end of the vacuum storage tank 6 is connected to the intake manifold 5 through the check valve 7.
- the one-way valve 7 only allows the gas in the vacuum gas storage tank 6 to flow 5 to the intake manifold, so that the gas in the vacuum gas storage tank 6 flows out of the intake manifold 5 in the case where there is a vacuum in the intake manifold at the cold start. , storage vacuum. Also, the volume of the vacuum storage tank 6 is at least five times the volume of the vacuum chamber 206 of the secondary air combination valve 2.
- the secondary air combination valve 2 includes a valve body 201, a spool 202, an intake port 203, an air outlet 204, and a return spring 205.
- the vacuum chamber 206, the return spring 205, and the spool 202 are both located inside the valve body 201. More specifically, in the present embodiment, the return spring 205 is a diaphragm spring, and the diaphragm spring constitutes a part of the vacuum chamber 206.
- the left side of the line A-A indicates the position after the spool 202 is actuated, and the right side indicates the position of the spool 202 in the initial state. In the initial state, the spool 202 is in a position to disconnect the intake port 203 from the air passage of the air outlet 204.
- the specific working principle of the secondary air injection system is that the air of the air cleaner 8 is normally provided to the intake manifold 5 when the engine is started, and the engine secondary air injection system is activated by the engine ECU 9 during the cold start operation of the engine. Starting work. After the engine is started, the air passing through the air cleaner 8 is directly blown to the exhaust manifold 1 through the secondary air jet pump 4, while the solenoid valve 3 is controlled by the engine ECU 9, and the secondary air combination is driven by pressure. Valve 2 starts working.
- the secondary air jet pump 4 functions to press air into the exhaust gas of the exhaust manifold 1 in a short period of time.
- the hot exhaust gas will stop outside the secondary air combination valve 2, preventing the exhaust gas from entering the secondary air injection pump 4.
- the air in the exhaust manifold 1 oxidizes HC and CO in the exhaust gas, releasing heat to accelerate the ignition of the catalyst, improving the conversion efficiency of the catalyst, and improving the emission index.
- the specific working condition is that a vacuum gas storage tank 6 and a check valve 7 are installed between the electromagnetic valve 3 and the intake manifold 5, and the check valve 7 ensures that the gas in the vacuum gas storage tank can only be directed to the intake air.
- the tube 5 flows in the direction.
- the engine ECU 9 controls the solenoid valve 3 to open, at which time, the gas in the line connected to the solenoid valve 3 of the secondary air combination valve 2 enters the vacuum storage tank 6, that is, the vacuum
- the gas storage tank 6 evacuates the vacuum chamber 206 through the vacuum pumping tube 207.
- the pressure difference inside the valve body 201 drives the valve body 202 to enter a state in which the air inlet 203 and the air outlet 204 are in communication with each other, and the return spring The 205 deforms as the spool 202 acts to provide a restoring force that drives the spool 202 back to the initial state. Since the return spring 205 is a diaphragm spring and forms part of the vacuum chamber 206, the return spring 205 is more sensitive to the vacuuming action, so that the action response of the spool 202 is more timely. As the intake port 203 of the secondary air combination valve 202 and the air outlet 204 are electrically connected, the air enters the exhaust manifold 1 through the secondary air injection pump 4.
- the vacuum in the vacuum gas storage tank 6 caused by the intake manifold 5 during the cold start process is not excessive.
- the vacuum chamber 206 is induced to generate an excessive pressure differential, thereby preventing excessive injection of compressed air.
- the volume difference can also ensure that a certain degree of vacuum remains in the vacuum reservoir 6 before the start of the next injection process in response to the next opening of the secondary air combination valve 2.
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Abstract
Disclosed is a secondary air injection system of an engine, comprising a secondary air injection pump (4), a secondary air combination valve (2), an electromagnetic valve (3), a vacuum air storage tank (6) and a check valve (7), wherein an air inlet of the secondary air injection pump (4) is in communication with an air filter (8), and an air outlet of the secondary air injection pump (4) is in communication with an air inlet of the secondary air combination valve (2); an air outlet of the secondary air combination valve (2) is in communication with an exhaust manifold (1) of the engine; one end of the electromagnetic valve (3) is in communication with the vacuum air storage tank (6), and the other end thereof is in communication with a vacuum chamber of the secondary air combination valve (2); the secondary air injection pump (4) and the electromagnetic valve (3) are respectively connected to an ECU (9) and are controlled by the ECU (9); the other end of the vacuum air storage tank (6) is connected to an intake manifold (5) by means of the check valve (7), so that air in the vacuum air storage tank (6) only flows to the intake manifold (5); and the volume of the vacuum air storage tank (6) is at least five times as large as that of the vacuum chamber. The system can avoid excessive injection of compressed air when the compressed secondary air is injected.
Description
本实用新型属于内燃机技术领域，具体涉及一种发动机二次空气喷射***。The utility model belongs to the technical field of internal combustion engines, and in particular relates to an engine secondary air injection system.
增压发动机冷起动后暖机过程中，发动机处于非正常、不稳定工作状态，由于发动机冷却水温、机油温度低，燃料雾化性、与空气混合均匀性差，发动机存在失火、燃烧不完全的问题；由于增压器吸热，三效催化转化器不能迅速起燃等问题，导致该过程中排放物水平高，尤其是该过程中未燃HC的排放在FTP(Federal Test Procedure)工况法中大约占到70％。因此如何解决汽油发动机冷起动过程中排放严重的问题，是当前亟待解决的问题。During the warm-up after the cold start of the supercharged engine, the engine is in an abnormal and unstable working state. Due to the low temperature of the engine cooling water and the low oil temperature, the fuel atomization and air mixing uniformity are poor, and the engine has misfire and incomplete combustion. Due to the heat absorption of the supercharger, the three-way catalytic converter can not quickly start to ignite, leading to high levels of emissions in the process, especially in the process of unburned HC emissions in the FTP (Federal Test Procedure) operating conditions About 70%. Therefore, how to solve the problem of serious emissions during the cold start of gasoline engines is an urgent problem to be solved.
泵式二次空气喷射技术采用泵压控制式二次空气组合阀，利用二次空气喷射泵与二次空气组合阀之间的空气压力差控制其开启。当喷射泵与组合阀之间的压力达到一定程度的数值后便将二次空气组合阀的阀体打开，将适量压缩空气喷射至排气歧管中。这种利用压差来控制阀体的开启方式，由于压差较大，容易造成阀体开启幅度较大，喷入的压缩空气过量。另一种方式是利用真空罐来储存冷启动使进气歧管产生的真空，但该方式仍然存在如何使真空罐所实现的压差处于一个合理范围内的问题。The pump type secondary air injection technology adopts a pump-controlled secondary air combination valve, and controls the opening of the air pressure difference between the secondary air jet pump and the secondary air combination valve. When the pressure between the jet pump and the combination valve reaches a certain level, the valve body of the secondary air combination valve is opened, and an appropriate amount of compressed air is injected into the exhaust manifold. The use of the pressure difference to control the opening manner of the valve body, due to the large pressure difference, is likely to cause a large opening of the valve body, and the compressed air injected is excessive. Another way is to use a vacuum tank to store the vacuum created by the cold start to create the intake manifold, but this approach still has the problem of how to achieve a reasonable pressure differential across the vacuum tank.
实用新型内容Utility model content
为了克服二次空气喷射过程中压缩空气喷射过量的问题，本实用新型通过对现有增压发动机的排气***进行改进，提供一种二次空气喷射***。In order to overcome the problem of excessive injection of compressed air during secondary air injection, the present invention provides a secondary air injection system by improving the exhaust system of the existing supercharged engine.
本实用新型是通过以下技术方案实现的：The utility model is realized by the following technical solutions:
一种发动机二次空气喷射***，包括二次空气喷射泵、二次空气组合阀、电磁阀、真空储气罐及单向阀；其中二次空气喷射泵进气口与空气滤清器连通，二次空气喷射泵出气口与二次空气组合阀进气口连通；二次空气组合阀出气口与发动机的排气歧管连通；电磁阀一端与真空储气罐连通，另一端与二次空气
组合阀的真空室连通；二次空气喷射泵和电磁阀分别与ECU连接并受ECU控制；真空储气罐的另一端通过单向阀与进气歧管连接使得真空储气罐内的气体仅向所述进气歧管流动；所述真空储气罐的体积至少为所述真空室的体积的五倍。An engine secondary air injection system includes a secondary air injection pump, a secondary air combination valve, a solenoid valve, a vacuum gas storage tank and a one-way valve; wherein the secondary air injection pump inlet is connected to the air cleaner, The outlet of the secondary air jet pump is connected with the inlet of the secondary air combination valve; the outlet of the secondary air combination valve is in communication with the exhaust manifold of the engine; one end of the solenoid valve is connected to the vacuum storage tank, and the other end is connected with the secondary air.
The vacuum chamber of the combination valve is connected; the secondary air injection pump and the electromagnetic valve are respectively connected to the ECU and controlled by the ECU; the other end of the vacuum storage tank is connected to the intake manifold through the one-way valve so that the gas in the vacuum storage tank is only Flowing into the intake manifold; the volume of the vacuum reservoir is at least five times the volume of the vacuum chamber.
优选地，所述二次空气组合阀包括阀体、阀芯、进气口、出气口、和回位弹簧，所述阀体内部具有真空室；初始状态下，所述阀芯处于使所述进气口与所述出气口的气路断开的位置；当所述真空室被抽真空时，所述阀芯动作处于使所述进气口与所述出气口的气路连通的状态，且所述回位弹簧随所述阀芯动作产生形变以提供驱动所述阀芯回复至初始状态的回复力。Preferably, the secondary air combination valve includes a valve body, a valve core, an air inlet, an air outlet, and a return spring, the valve body having a vacuum chamber therein; in an initial state, the spool is in the a position at which the air inlet is disconnected from the air passage of the air outlet; when the vacuum chamber is evacuated, the spool operation is in a state of communicating the air inlet with the air passage of the air outlet, And the return spring is deformed with the action of the spool to provide a restoring force for driving the spool back to an initial state.
优选地，所述回位弹簧为膜片弹簧，且所述膜片弹簧构成所述真空室的一部分。Preferably, the return spring is a diaphragm spring and the diaphragm spring constitutes a part of the vacuum chamber.
优选地，所述发动机二次空气喷射***安装于涡轮增压发动机上。Preferably, the engine secondary air injection system is mounted on a turbocharged engine.
本实用新型的有益效果是：The beneficial effects of the utility model are:
通过控制真空储气罐的体积与二次空气组合阀的真空室的体积比，来保证冷启动时进气歧管所引发的真空储气罐内的真空度不至于过大，从而将压差控制在一个合理范围内，避免喷入的压缩空气过量。By controlling the volume ratio of the volume of the vacuum storage tank to the vacuum chamber of the secondary air combination valve, it is ensured that the vacuum in the vacuum storage tank caused by the intake manifold during cold start is not excessively large, thereby the pressure difference Control is within a reasonable range to avoid excessive injection of compressed air.
进一步地，本实用新型所采用的二次空气组合阀具有结构简单、压差响应灵敏度好的优点。Further, the secondary air combination valve used in the utility model has the advantages of simple structure and good differential pressure response sensitivity.
图1为本实用新型的实施例的二次空气喷射***的结构示意图；1 is a schematic structural view of a secondary air injection system according to an embodiment of the present invention;
图2为本实用新型的实施例的二次空气组合阀的立体图；2 is a perspective view of a secondary air combination valve according to an embodiment of the present invention;
图3为本实用新型的实施例的二次空气组合阀的剖视图。Figure 3 is a cross-sectional view of a secondary air combination valve of an embodiment of the present invention.
以下通过具体实施例来详细说明本实用新型的技术方案，应当理解的是，以下的实施例仅是示例性的，仅能用来解释和说明本实用新型的技术方案，而不能解释为是对本实用新型技术方案的限制。The following is a detailed description of the technical solutions of the present invention by way of specific embodiments. It should be understood that the following embodiments are merely illustrative and can be used to explain and explain the technical solutions of the present invention. Limitations of utility model solutions.
涡轮增压发动机二次空气喷射***具体在以下两种工作情况下工作：发动
机冷启动后和热启动时自诊断。在本申请的技术方案中，主要是指发动机冷启动情况下的技术改进。The turbocharged engine secondary air injection system works specifically under the following two working conditions: starting
Self-diagnosis after cold start and hot start. In the technical solution of the present application, it mainly refers to a technical improvement in the case of cold start of the engine.
结合图1至图3，二次空气喷射泵4的进气口与空气滤清器8连通，二次空气喷射泵4的出气口与二次空气组合阀2的进气口203连通；二次空气组合阀2的出气口204与发动机的排气歧管1连通；电磁阀3一端与真空储气罐6连通，另一端与二次空气组合阀2的真空室206通过抽真空管207连通；二次空气喷射泵4和电磁阀3分别与ECU9连接并受ECU9控制；真空储气罐6的另一端通过单向阀7与进气歧管5连接。单向阀7仅允许真空储气罐6内的气体向进气歧管流动5，从而在冷启动时进气歧管存在真空的情况下真空储气罐6内的气体流出进气歧管5，存储真空。并且，真空储气罐6的体积至少为二次空气组合阀2的真空室206的体积的五倍。1 to 3, the intake port of the secondary air jet pump 4 is in communication with the air cleaner 8, and the air outlet of the secondary air jet pump 4 is connected to the intake port 203 of the secondary air combination valve 2; The air outlet port 204 of the air combination valve 2 is in communication with the exhaust manifold 1 of the engine; one end of the solenoid valve 3 is in communication with the vacuum gas storage tank 6, and the other end is connected to the vacuum chamber 206 of the secondary air combination valve 2 through the vacuum pumping tube 207; The secondary air injection pump 4 and the electromagnetic valve 3 are respectively connected to the ECU 9 and controlled by the ECU 9; the other end of the vacuum storage tank 6 is connected to the intake manifold 5 through the check valve 7. The one-way valve 7 only allows the gas in the vacuum gas storage tank 6 to flow 5 to the intake manifold, so that the gas in the vacuum gas storage tank 6 flows out of the intake manifold 5 in the case where there is a vacuum in the intake manifold at the cold start. , storage vacuum. Also, the volume of the vacuum storage tank 6 is at least five times the volume of the vacuum chamber 206 of the secondary air combination valve 2.
结合图2、图3更清晰可见，二次空气组合阀2包括阀体201、阀芯202、进气口203、出气口204、和回位弹簧205。真空室206、回位弹簧205和阀芯202均位于阀体201内部。更具体地，在本实施例中回位弹簧205为膜片弹簧，并且该膜片弹簧构成了真空室206的一部分。在图3中，线A-A的左侧表示的是阀芯202动作后所处位置，而右侧表示的是阀芯202在初始状态下所处位置。在初始状态下，阀芯202处于使进气口203与出气口204的气路断开的位置。As can be seen more clearly in connection with FIGS. 2 and 3, the secondary air combination valve 2 includes a valve body 201, a spool 202, an intake port 203, an air outlet 204, and a return spring 205. The vacuum chamber 206, the return spring 205, and the spool 202 are both located inside the valve body 201. More specifically, in the present embodiment, the return spring 205 is a diaphragm spring, and the diaphragm spring constitutes a part of the vacuum chamber 206. In Fig. 3, the left side of the line A-A indicates the position after the spool 202 is actuated, and the right side indicates the position of the spool 202 in the initial state. In the initial state, the spool 202 is in a position to disconnect the intake port 203 from the air passage of the air outlet 204.
该二次空气喷射***的具体工作原理为：空气滤清器8的空气在发动机启动时正常提供给进气歧管5，在发动机冷启动工作时，通过发动机ECU 9激活发动机二次空气喷射***开始工作.发动机启动后经过空气滤清器8的空气通过二次空气喷射泵4直接被吹到排气歧管1后，同时由发动机ECU 9控制电磁阀3，并通过压力驱动二次空气组合阀2开始工作。二次空气喷射泵4的作用是在很短的时间内将空气压进排气歧管1的废气中。在二次空气喷射***未工作状态下，热的废气将停止在二次空气组合阀2外，阻止废气进入二次空气喷射泵4。排气歧管1内的空气对废气中的HC和CO进行氧化，释放热量加快催化器起燃，提高催化器转换效率，改善排放指标。The specific working principle of the secondary air injection system is that the air of the air cleaner 8 is normally provided to the intake manifold 5 when the engine is started, and the engine secondary air injection system is activated by the engine ECU 9 during the cold start operation of the engine. Starting work. After the engine is started, the air passing through the air cleaner 8 is directly blown to the exhaust manifold 1 through the secondary air jet pump 4, while the solenoid valve 3 is controlled by the engine ECU 9, and the secondary air combination is driven by pressure. Valve 2 starts working. The secondary air jet pump 4 functions to press air into the exhaust gas of the exhaust manifold 1 in a short period of time. In the non-operating state of the secondary air injection system, the hot exhaust gas will stop outside the secondary air combination valve 2, preventing the exhaust gas from entering the secondary air injection pump 4. The air in the exhaust manifold 1 oxidizes HC and CO in the exhaust gas, releasing heat to accelerate the ignition of the catalyst, improving the conversion efficiency of the catalyst, and improving the emission index.
其具体的工作情况是，在电磁阀3与进气歧管5之间安装有真空储气罐6和单向阀7，单向阀7保证真空储气罐内的气体只能向进气歧管5方向流动。在二次空气喷射***未工作时，随着空气滤清器8的空气向进气歧管5的流动，
产生的虹吸现象将真空储气罐6内的气体抽出。当二次空气喷射***启动时，发动机ECU 9控制电磁阀阀3打开，这时，二次空气组合阀2与电磁阀3相连接的管线内的气体进入到真空储气罐6内，即真空储气罐6通过抽真空管207对真空室206抽真空，此时阀体201内部的压差驱动阀芯202动作进入使进气口203与出气口204的气路连通的状态，并且回位弹簧205随着阀芯202动作产生形变以提供驱动阀芯202回复至初始状态的回复力。由于回位弹簧205为膜片弹簧并且形成了真空室206的一部分，所以回位弹簧205对抽真空的反应更加灵敏，使得阀芯202的动作响应更加及时。随着二次空气组合阀202的进气口203与出气口204的导通，空气通过二次空气喷射泵4进入到排气歧管1。在此过程中，由于真空储气罐6的体积达到了真空室206的五倍甚至更高，因此在冷启动过程中进气歧管5所导致的真空储气罐6内的真空度不至于引发真空室206产生过大压力差，从而防止了压缩空气喷射过量。而且，该体积差还能够保证在下一喷射过程开始前真空储气罐6内仍残存一定的真空度来响应二次空气组合阀2的下一次打开。The specific working condition is that a vacuum gas storage tank 6 and a check valve 7 are installed between the electromagnetic valve 3 and the intake manifold 5, and the check valve 7 ensures that the gas in the vacuum gas storage tank can only be directed to the intake air. The tube 5 flows in the direction. When the secondary air injection system is not operating, as the air of the air cleaner 8 flows toward the intake manifold 5,
The generated siphon phenomenon draws out the gas in the vacuum gas tank 6. When the secondary air injection system is started, the engine ECU 9 controls the solenoid valve 3 to open, at which time, the gas in the line connected to the solenoid valve 3 of the secondary air combination valve 2 enters the vacuum storage tank 6, that is, the vacuum The gas storage tank 6 evacuates the vacuum chamber 206 through the vacuum pumping tube 207. At this time, the pressure difference inside the valve body 201 drives the valve body 202 to enter a state in which the air inlet 203 and the air outlet 204 are in communication with each other, and the return spring The 205 deforms as the spool 202 acts to provide a restoring force that drives the spool 202 back to the initial state. Since the return spring 205 is a diaphragm spring and forms part of the vacuum chamber 206, the return spring 205 is more sensitive to the vacuuming action, so that the action response of the spool 202 is more timely. As the intake port 203 of the secondary air combination valve 202 and the air outlet 204 are electrically connected, the air enters the exhaust manifold 1 through the secondary air injection pump 4. In this process, since the volume of the vacuum gas storage tank 6 reaches five times or more the vacuum chamber 206, the vacuum in the vacuum gas storage tank 6 caused by the intake manifold 5 during the cold start process is not excessive. The vacuum chamber 206 is induced to generate an excessive pressure differential, thereby preventing excessive injection of compressed air. Moreover, the volume difference can also ensure that a certain degree of vacuum remains in the vacuum reservoir 6 before the start of the next injection process in response to the next opening of the secondary air combination valve 2.
尽管已经示出和描述了本实用新型的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本实用新型的范围由所附权利要求及其等同限定。
While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.
Claims (4)
- 一种发动机二次空气喷射***，其特征在于：包括二次空气喷射泵、二次空气组合阀、电磁阀、真空储气罐及单向阀；其中二次空气喷射泵进气口与空气滤清器连通，二次空气喷射泵出气口与二次空气组合阀进气口连通；二次空气组合阀出气口与发动机的排气歧管连通；电磁阀一端与真空储气罐连通，另一端与二次空气组合阀的真空室连通；二次空气喷射泵和电磁阀分别与ECU连接并受ECU控制；真空储气罐的另一端通过单向阀与进气歧管连接使得真空储气罐内的气体仅向所述进气歧管流动；所述真空储气罐的体积至少为所述真空室的体积的五倍。An engine secondary air injection system, comprising: a secondary air injection pump, a secondary air combination valve, a solenoid valve, a vacuum gas storage tank and a check valve; wherein the secondary air injection pump inlet and the air filter The cleaner is connected, the outlet of the secondary air jet pump is connected with the inlet of the secondary air combination valve; the outlet of the secondary air combination valve is connected with the exhaust manifold of the engine; one end of the solenoid valve is connected with the vacuum gas storage tank, and the other end is connected Connected to the vacuum chamber of the secondary air combination valve; the secondary air injection pump and the solenoid valve are respectively connected to the ECU and controlled by the ECU; the other end of the vacuum gas storage tank is connected to the intake manifold through the one-way valve to make the vacuum gas storage tank The gas inside flows only to the intake manifold; the volume of the vacuum reservoir is at least five times the volume of the vacuum chamber.
- 根据权利要求1所述的发动机二次空气喷射***，其特征在于：所述二次空气组合阀包括阀体、阀芯、进气口、出气口、和回位弹簧，所述阀体内部具有真空室；初始状态下，所述阀芯处于使所述进气口与所述出气口的气路断开的位置；当所述真空室被抽真空时，所述阀芯动作处于使所述进气口与所述出气口的气路连通的状态，且所述回位弹簧随所述阀芯动作产生形变以提供驱动所述阀芯回复至初始状态的回复力。The engine secondary air injection system according to claim 1, wherein the secondary air combination valve comprises a valve body, a valve core, an air inlet, an air outlet, and a return spring, wherein the valve body has an internal a vacuum chamber; in an initial state, the spool is in a position to disconnect the air inlet from the air passage of the air outlet; when the vacuum chamber is evacuated, the spool action is in the a state in which the intake port is in communication with the air passage of the air outlet, and the return spring is deformed in accordance with the action of the spool to provide a restoring force for driving the spool to return to an initial state.
- 根据权利要求2所述的二次空气喷射***，其特征在于：所述回位弹簧为膜片弹簧，且所述膜片弹簧构成所述真空室的一部分。The secondary air injection system according to claim 2, wherein said return spring is a diaphragm spring, and said diaphragm spring constitutes a part of said vacuum chamber.
- 根据权利要求1所述的发动机二次空气喷射***，其特征在于：所述发动机二次空气喷射***安装于涡轮增压发动机上。 The engine secondary air injection system of claim 1 wherein said engine secondary air injection system is mounted to a turbocharged engine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR212017014240-1U BR212017014240Y1 (en) | 2014-12-31 | 2015-04-01 | secondary engine air injection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420870320.8U CN204357597U (en) | 2014-12-31 | 2014-12-31 | A kind of secondary air injection system of engine |
| CN201420870320.8 | 2014-12-31 |
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| WO2016106993A1 true WO2016106993A1 (en) | 2016-07-07 |
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| PCT/CN2015/075711 WO2016106993A1 (en) | 2014-12-31 | 2015-04-01 | Secondary air injection system of engine |
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| CN (1) | CN204357597U (en) |
| BR (1) | BR212017014240Y1 (en) |
| WO (1) | WO2016106993A1 (en) |
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| CN204357597U (en) * | 2014-12-31 | 2015-05-27 | 安徽江淮汽车股份有限公司 | A kind of secondary air injection system of engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196150A (en) * | 2006-12-06 | 2008-06-11 | 奇瑞汽车有限公司 | Vacuum system of engine with supercharger |
| CN101657614A (en) * | 2007-04-18 | 2010-02-24 | 丰田自动车株式会社 | Secondary air supply system and secondary air supplying method of internal combustion engine |
| CN203383886U (en) * | 2013-08-08 | 2014-01-08 | 安徽江淮汽车股份有限公司 | Secondary air jetting device for engine |
| CN103511064A (en) * | 2012-06-15 | 2014-01-15 | 现代自动车株式会社 | Secondary air injection system |
| CN204357597U (en) * | 2014-12-31 | 2015-05-27 | 安徽江淮汽车股份有限公司 | A kind of secondary air injection system of engine |
-
2014
- 2014-12-31 CN CN201420870320.8U patent/CN204357597U/en not_active Expired - Fee Related
-
2015
- 2015-04-01 WO PCT/CN2015/075711 patent/WO2016106993A1/en active Application Filing
- 2015-04-01 BR BR212017014240-1U patent/BR212017014240Y1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196150A (en) * | 2006-12-06 | 2008-06-11 | 奇瑞汽车有限公司 | Vacuum system of engine with supercharger |
| CN101657614A (en) * | 2007-04-18 | 2010-02-24 | 丰田自动车株式会社 | Secondary air supply system and secondary air supplying method of internal combustion engine |
| CN103511064A (en) * | 2012-06-15 | 2014-01-15 | 现代自动车株式会社 | Secondary air injection system |
| CN203383886U (en) * | 2013-08-08 | 2014-01-08 | 安徽江淮汽车股份有限公司 | Secondary air jetting device for engine |
| CN204357597U (en) * | 2014-12-31 | 2015-05-27 | 安徽江淮汽车股份有限公司 | A kind of secondary air injection system of engine |
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| Publication number | Publication date |
|---|---|
| BR212017014240U2 (en) | 2018-05-29 |
| CN204357597U (en) | 2015-05-27 |
| BR212017014240Y1 (en) | 2020-11-24 |
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