WO2015018215A1 - Secondary air jetting apparatus for engine - Google Patents

Secondary air jetting apparatus for engine Download PDF

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Publication number
WO2015018215A1
WO2015018215A1 PCT/CN2014/076940 CN2014076940W WO2015018215A1 WO 2015018215 A1 WO2015018215 A1 WO 2015018215A1 CN 2014076940 W CN2014076940 W CN 2014076940W WO 2015018215 A1 WO2015018215 A1 WO 2015018215A1
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WIPO (PCT)
Prior art keywords
secondary air
engine
valve
air
vacuum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/076940
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French (fr)
Chinese (zh)
Inventor
胡俊勇
刘青林
杜鹏
何博
李财宝
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Publication of WO2015018215A1 publication Critical patent/WO2015018215A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F01N3/32—Arrangements for supply of additional air using air pump
    • F01N3/323—Electrically driven air pumps
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F01N3/227—Control of additional air supply only, e.g. using by-passes or variable air pump drives using pneumatically operated valves, e.g. membrane valves
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the utility model belongs to the technical field of internal combustion engines, in particular to an engine secondary air injection device. Background technique
  • the present invention provides a turbocharged secondary air injection device by improving the exhaust system of the existing supercharged engine.
  • An engine secondary air injection device includes a secondary air pump, a secondary intake valve, a solenoid valve, a vacuum gas storage tank and a check valve; wherein the secondary air pump inlet port and the air filter port are connected by a bellows, The secondary air pump outlet port is connected with the secondary air valve inlet port by a bellows; the secondary intake valve outlet port is electrically connected to the engine four exhaust manifolds; one end of the solenoid valve is connected to the vacuum gas storage tank, and One end is connected to the secondary air valve; the secondary air 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 one-way valve, and the one-way valve is connected with the exhaust air intake manifold.
  • the engine secondary air injection device is mounted on a turbocharged engine.
  • the utility model has the beneficial effects that: during the cold start process of the ignition engine, the HC and CO emissions are deteriorated due to the catalytic converter not reaching the light-off temperature, and the secondary air after-treatment system can significantly improve the exhaust gas temperature and improve. The discharge of the process.
  • FIG. 1 is a schematic view of the structure of the present invention. detailed description
  • the utility model relates to a turbocharged engine secondary air injection device which is operated under the following two working conditions: self-diagnosis after cold start of the engine and hot start.
  • self-diagnosis after cold start of the engine and hot start.
  • it mainly refers to a technical improvement in the case of cold start of the engine.
  • the air of the filter 6 is normally supplied to the intake manifold when the engine is started, and when the engine is cold-started, the engine secondary air injection device is activated by the engine ECU 7, and the air passing through the filter 6 after the engine is started
  • the secondary air pump 4 is directly blown to the exhaust manifold 1, while the solenoid valve 3 is controlled by the engine ECU 7, and the secondary intake valve 2 is started to operate by pressure.
  • the secondary air pump 4 functions to press air into the exhaust gas of the exhaust manifold 1 in a short period of time. In the unoperated state of the secondary air injection device, the hot exhaust gas will stop outside the secondary intake valve 2, preventing the exhaust gas from entering the secondary air pump 4.
  • the air in the exhaust manifold 1 oxidizes the HC and CO in the exhaust gas, releases the heat to accelerate the ignition of the catalyst, improves the converter conversion efficiency, and improves the emission index.
  • the specific working condition is that a vacuum gas storage tank and a check valve (not shown) are installed between the electromagnetic valve 3 and the intake manifold 5, and the one-way valve ensures that the gas in the vacuum gas storage tank can only be Flows in the direction of the intake manifold 5.
  • the engine ECU 7 controls the solenoid valve 3 to open, at which time, the gas in the line connecting the secondary intake valve 1 and the solenoid valve 3 enters the vacuum storage tank, in the second time.
  • a pressure difference occurs in the intake valve 2, the secondary intake valve 2 is opened by this pressure difference, and the air enters the exhaust manifold 1 through the secondary air pump 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A secondary air jetting apparatus for an engine comprises a secondary air pump (4), a secondary air inlet valve (2), an electromagnetic valve (3), a vacuum air storage tank, and a one-way valve. An air inlet of the secondary air pump (4) is in communication with an air filter (6) through a corrugated pipe. An air outlet of the secondary air pump (4) is in communication with an air inlet of the secondary air inlet valve (2). An air outlet of the secondary air inlet valve (2) is in communication with four exhaust manifolds of the engine. One end of the electromagnetic valve (3) is communication with the vacuum air storage tank (3), and the other end is in communication with the secondary air inlet valve (2). The secondary air pump (4) and the electromagnetic valve (3) are separately connected to an ECU and are controlled by the ECU. The other end of the vacuum air storage tank is connected to the one-way valve. The one-way valve is connected exhaust and intake manifolds. In a cold starting process of a spark ignition engine, discharge of HC and CO deteriorates because a catalytic converter does not reach a ignition temperature, and the discharge temperature can be obviously increased and then discharge of the process is improved after a secondary air after-treatment system is additionally disposed.

Description

一种发动机二次空气喷射装置  Engine secondary air injection device

技术领域 Technical field

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装置。 背景技术  The utility model belongs to the technical field of internal combustion engines, in particular to an engine secondary air injection device. Background technique

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、 与空气混合均勾性差， 发动 机存在失火、 燃烧不完全； 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排放在 FTP工况 法中大约占到 70 %。 申请号为 CN200610157333. 0的专利要求保护的是一种增 压发动机真空系统，该系统是通过在发动机进气歧管与真空助力器之间的管路 上设置有产生真空度的装置，该结构能够提高增压发动机的真空系统不足之处， 但是却不能解决排气的污染物的量的问题，特别是对于增压发动机的冷启动时 的尾气排放问题。 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。 实用新型内容  During the warm-up process 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 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, which leads to high levels of emissions in the process, especially in the process, the unburned HC emissions account for about 70% in the FTP operating conditions. The patent application No. CN200610157333. 0 claims a supercharged engine vacuum system which is provided with a vacuum generating device on a pipeline between an engine intake manifold and a vacuum booster, the structure capable of Increasing the vacuum system of the supercharged engine is not sufficient, but it does not solve the problem of the amount of pollutants in the exhaust gas, especially for the exhaust emission of the supercharged engine during cold start. Therefore, how to solve the problem of serious emissions during the cold start of gasoline engines is an urgent problem to be solved. Utility model content

为了克服增压发动机冷起动过程中排放严重的问题，本实用新型通过对现 有增压发动机的排气系统进行改进，提供一种一种涡轮增压发动机二次空气喷 射装置。  In order to overcome the problem of severe exhaust during the cold start of the supercharged engine, the present invention provides a turbocharged secondary air injection device 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装置， 包括二次空气泵、 二次进气阀、 电磁阀、 真空储气罐及单向阀； 其中二次空气泵进气口与空滤器釆用波纹管连通，二次 空气泵出气口与二次空气阀进气口釆用波纹管连通；二次进气阀出气口与发动 机四个排气歧管相导通； 电磁阀一端与真空储气罐连通， 另一端与二次空气阀 连通； 二次空气泵和电磁阀分别与 ECU连接并由 ECU控制； 真空储气罐的另一 端连接单向阀， 单向阀与排进气歧管连接。 所述发动机二次空气喷射装置安装于涡轮增压发动机上。 An engine secondary air injection device includes a secondary air pump, a secondary intake valve, a solenoid valve, a vacuum gas storage tank and a check valve; wherein the secondary air pump inlet port and the air filter port are connected by a bellows, The secondary air pump outlet port is connected with the secondary air valve inlet port by a bellows; the secondary intake valve outlet port is electrically connected to the engine four exhaust manifolds; one end of the solenoid valve is connected to the vacuum gas storage tank, and One end is connected to the secondary air valve; the secondary air 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 one-way valve, and the one-way valve is connected with the exhaust air intake manifold. The engine secondary air injection device is mounted on a turbocharged engine.

本实用新型的有益效果是： 在点燃式发动机冷起动过程中， 由于催化转化 器未达到起燃温度造成 HC和 CO排放恶化，而加装二次空气后处理系统可以明 显提高排气温度进而改善该过程的排放。 附图说明  The utility model has the beneficial effects that: during the cold start process of the ignition engine, the HC and CO emissions are deteriorated due to the catalytic converter not reaching the light-off temperature, and the secondary air after-treatment system can significantly improve the exhaust gas temperature and improve. The discharge of the process. DRAWINGS

本实用新型上述的和 /或附加的方面和优点从下面结合附图对实施例 的描述中将变得明显和容易理解， 其中：  The above and/or additional aspects and advantages of the invention will be apparent from the

图 1为本实用新型结构示意图。 具体实施方式  Figure 1 is a schematic view of the structure of the present invention. detailed description

下面详细描述本实用新型的实施例，所述实施例的示例在附图中示出， 其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似 功能的元件。 下面通过参考附图描述的实施例是示例性的， 仅用于解释本 实用新型， 而不能解释为对本实用新型的限制。  The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

涉及一种涡轮增压发动机二次空气喷射装置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 utility model relates to a turbocharged engine secondary air injection device which is operated under the following two working conditions: self-diagnosis after cold start of the engine 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.

滤清器 6的空气在发动机启动时正常提供给进气歧管，在发动机冷启动工 作时， 通过发动机 ECU 7激活发动机二次空气喷射装置开始工作， 发动机启动 后经过滤清器 6的空气通过二次空气泵 4直接被吹到排气歧管 1后，同时由发 动机 ECU 7控制电磁阀阀 3， 并通过压力驱动二次进气阀 2开始工作。 二次空 气泵 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 喷射装置未工作状态下， 热的废气将停止在二次进气阀 2外， 阻止废气进入二 次空气泵 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 air of the filter 6 is normally supplied to the intake manifold when the engine is started, and when the engine is cold-started, the engine secondary air injection device is activated by the engine ECU 7, and the air passing through the filter 6 after the engine is started The secondary air pump 4 is directly blown to the exhaust manifold 1, while the solenoid valve 3 is controlled by the engine ECU 7, and the secondary intake valve 2 is started to operate by pressure. The secondary air pump 4 functions to press air into the exhaust gas of the exhaust manifold 1 in a short period of time. In the unoperated state of the secondary air injection device, the hot exhaust gas will stop outside the secondary intake valve 2, preventing the exhaust gas from entering the secondary air pump 4. The air in the exhaust manifold 1 oxidizes the HC and CO in the exhaust gas, releases the heat to accelerate the ignition of the catalyst, improves the converter conversion efficiency, and improves 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和 单向阀 （图中未示出）， 单向阀保证真空储气罐内的气体只能向进气歧管 5方 向流动。 在二次空气喷射装置未工作时， 随着滤清器 6 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内的气体抽出。 当二次空气喷射装置启 动时， 发动机 ECU 7控制电磁阀阀 3打开， 这时， 二次进气阀 1与电磁阀 3 相连接的管线内的气体进入到真空储气罐内， 在二次进气阀 2内出现压力差， 二次进气阀 2通过这一压力差打开，空气通过二次空气泵 4进入到排气歧管 1。 The specific working condition is that a vacuum gas storage tank and a check valve (not shown) are installed between the electromagnetic valve 3 and the intake manifold 5, and the one-way valve ensures that the gas in the vacuum gas storage tank can only be Flows in the direction of the intake manifold 5. When the secondary air injection device is not operating, the air of the filter 6 is directed to the intake manifold 5 The flow, the resulting siphon phenomenon draws out the gas in the vacuum storage tank. When the secondary air injection device is started, the engine ECU 7 controls the solenoid valve 3 to open, at which time, the gas in the line connecting the secondary intake valve 1 and the solenoid valve 3 enters the vacuum storage tank, in the second time. A pressure difference occurs in the intake valve 2, the secondary intake valve 2 is opened by this pressure difference, and the air enters the exhaust manifold 1 through the secondary air pump 4.

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

权 利 要 求 Rights request 1、 一种发动机二次空气喷射装置， 其特征在于： 包括二次空气泵、 二次 进气阀、 电磁阀、 真空储气罐及单向阀； 其中二次空气泵进气口与空滤器釆用 波纹管连通，二次空气泵出气口与二次空气阀进气口釆用波纹管连通； 二次进 气阀出气口与发动机四个排气歧管相导通； 电磁阀一端与真空储气罐连通， 另 一端与二次空气阀连通； 二次空气泵和电磁阀分别与 ECU连接并由 ECU控制； 真空储气罐的另一端连接单向阀， 单向阀与排进气歧管连接。 1. An engine secondary air injection device, characterized by: including a secondary air pump, a secondary air intake valve, a solenoid valve, a vacuum air tank and a one-way valve; wherein the secondary air pump air inlet and air filter The air outlet of the secondary air pump is connected to the air inlet of the secondary air valve through a bellows; the air outlet of the secondary air intake valve is connected to the four exhaust manifolds of the engine; one end of the solenoid valve is connected to the vacuum The air storage tank is connected, and the other end is connected to the secondary air valve; the secondary air pump and the solenoid valve are connected to and controlled by the ECU respectively; the other end of the vacuum air storage tank is connected to the one-way valve, which is connected to the exhaust and intake manifold Pipe connection. 2、 根据权利要求 1所述的发动机二次空气喷射装置， 其特征在于： 所述 发动机二次空气喷射装置安装于涡轮增压发动机上。 2. The engine secondary air injection device according to claim 1, characterized in that: the engine secondary air injection device is installed on a turbocharged engine.
PCT/CN2014/076940 2013-08-08 2014-05-07 Secondary air jetting apparatus for engine Ceased WO2015018215A1 (en)

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CN201320484983.1U CN203383886U (en) 2013-08-08 2013-08-08 Secondary air jetting device for engine
CN201320484983.1 2013-08-08

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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
CN103821599A (en) * 2014-03-20 2014-05-28 安徽江淮汽车股份有限公司 Secondary air treatment system and method for automobile exhaust
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
CN104533646B (en) * 2014-12-31 2016-10-12 安徽江淮汽车股份有限公司 The combustion parameter adjustment method of engine with supercharger and combustion parameter debugging apparatus
DE102017201716A1 (en) * 2017-02-02 2018-08-02 Volkswagen Aktiengesellschaft Internal combustion engine with a secondary air pump and method for operating an internal combustion engine with a secondary air pump

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