WO2022156134A1 - 颗粒捕集器载体高温烧毁检测方法、***及诊断设备 - Google Patents

颗粒捕集器载体高温烧毁检测方法、***及诊断设备 Download PDF

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WO2022156134A1
WO2022156134A1 PCT/CN2021/101464 CN2021101464W WO2022156134A1 WO 2022156134 A1 WO2022156134 A1 WO 2022156134A1 CN 2021101464 W CN2021101464 W CN 2021101464W WO 2022156134 A1 WO2022156134 A1 WO 2022156134A1
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temperature
particle trap
carrier
temperature difference
accumulation
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PCT/CN2021/101464
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English (en)
French (fr)
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王世岩
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上海星融汽车科技有限公司
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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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • 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 invention belongs to the technical field of vehicle diagnosis, and in particular relates to a high-temperature burning detection method, system and diagnosis equipment for a particle trap carrier.
  • Automotive Particulate Filter is a device used to filter solid particles (mainly soot) in engine exhaust. After the airflow and soot particles enter the DPF, the airflow flows out from the inner wall due to the blocked outlet, thereby trapping the The soot is inside the DPF, which plays the role of collecting soot, and the purification efficiency is as high as 85% or more, which reduces the PM emission.
  • the DPF filters and collects particulates in the exhaust.
  • the soot in the DPF reaches a certain amount, the ECU needs to control the exhaust temperature of the engine to burn the accumulated soot for DPF regeneration, so that the DPF can continuously collect the particles in the exhaust.
  • the method of detecting DPF carrier burnout is mainly to judge by the carrier flow resistance (pressure difference/gas flow).
  • the carrier flow resistance pressure difference/gas flow
  • the carrier honeycomb structure is destroyed, and the flow resistance is smaller than the normal carrier.
  • the present invention adopts the following technical solutions:
  • a method for detecting high temperature burnout of a particle trap carrier including:
  • temperature difference accumulation front temperature - back temperature
  • Case 3 The temperature difference accumulation is greater than that of case 2, and smaller than that of case 1.
  • a system for detecting high temperature burnout of a particle trap carrier comprising a storage module, the storage module including instructions loaded and executed by a processor, the instructions, when executed, cause the processor to execute the above-mentioned one A particle trap carrier high temperature burn-out detection method.
  • a diagnostic apparatus having the above-mentioned high temperature burnout detection system for a particle trap carrier.
  • the present invention can automatically and real-time detect the high temperature burning of the particle filter carrier through the accumulated change of the temperature difference of the particle collector carrier, without relying on flow resistance, convenient and accurate, realize the timely replacement of the carrier, and make the PM amount meet the requirements of National VI emission. Regulatory requirements to improve vehicle safety.
  • Fig. 1 is the flow chart of the present invention
  • Fig. 2 is a schematic diagram of the present invention
  • FIG. 3 is a schematic diagram of the accumulation of temperature differences when the particle trap carrier of the present invention works normally and is not burned;
  • FIG. 4 is a schematic diagram of the accumulation of temperature differences when the particle trap carrier of the present invention is burned
  • FIG. 5 is a schematic diagram of temperature difference accumulation after the particle trap carrier of the present invention is burnt.
  • an embodiment of this specification provides a method for detecting high temperature burnout of a particle trap carrier, including:
  • Case 3 The temperature difference accumulation is greater than that of case 2, and smaller than that of case 1.
  • the particle trap carrier is not burned at high temperature and can continue to be used.
  • the accumulation of temperature difference is smaller than the accumulation of temperature difference when the carrier is working normally and not burnt, but it will be greater than that when the carrier is burned out. Therefore, after monitoring the temperature difference accumulation and the above three situations occur in sequence, it can be judged that the carrier has been burned, so that the carrier can be reminded to replace it in time, so that it can maintain the ability to filter PM.
  • the vehicle ECU monitors the front temperature and the rear temperature of the particle trap carrier, and calculates the temperature difference accumulation.
  • the diagnostic equipment can be used from the vehicle ECU through the OBD port. The accumulation of temperature difference is obtained in real time, and then it is judged whether the carrier of the particle trap is burnt.
  • the vehicle ECU can monitor the front temperature and the rear temperature through two temperature sensors arranged on both sides of the particle trap carrier.
  • the embodiments of this specification also provide a system for detecting high temperature burnout of a particle trap carrier, including a storage module, where the storage module includes instructions loaded and executed by a processor, and when the instructions are executed, the processor executes this specification
  • a storage module includes instructions loaded and executed by a processor, and when the instructions are executed, the processor executes this specification.
  • the storage module may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) and/or a cache storage unit, and may further include a read-only storage unit (ROM).
  • RAM random access storage unit
  • ROM read-only storage unit
  • Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural programming Language - such as the "C" language or similar programming language.
  • the program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server execute on.
  • the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (eg, using an Internet service provider business via an Internet connection).
  • LAN local area network
  • WAN wide area network
  • an external computing device eg, using an Internet service provider business via an Internet connection
  • the embodiments of the present specification further provide a diagnostic device, which has the above-mentioned high-temperature burnout detection system for a particle trap carrier, which will not be described in detail here.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

一种颗粒捕集器载体高温烧毁检测方法、***及诊断设备，可以通过颗粒捕集器载体的温差积累的变化情况，自动实时检测到颗粒捕集器载体高温烧毁。

Description

颗粒捕集器载体高温烧毁检测方法、***及诊断设备 技术领域
本发明属于车辆诊断技术领域，尤其涉及一种颗粒捕集器载体高温烧毁检测方法、***及诊断设备。
背景技术
汽车颗粒捕集器(DPF)是一种用于过滤发动机排气中固体颗粒(主要为碳烟)的装置，气流和碳烟颗粒进入DPF后，由于出口被堵，气流从内壁流出，从而截留碳烟在DPF内部，起到收集碳烟的作用，净化效率高到85％以上，起到降低PM排放的目的。在发动机处于正常工作模式时，DPF过滤并收集排气中的颗粒。当DPF中的碳烟达到一定的量之后，需要ECU控制发动机的排气温度来烧掉积累的碳烟进行DPF再生，以便DPF能持续不断的收集排气中的颗粒。
但是，一旦将载体烧毁会导致DPF对排放没有处理能力，PM大量排入大气，将导致污染环境。因此，如何检测载体已经烧毁，进而及时更换载体是至关重要的。
目前,检测DPF载体烧毁的方法主要为利用载体流动阻力(压差/气体流量)进行判断，当载体烧毁时，载体蜂窝结构遭到破坏，流动阻力小于正常载体。但由于不同工况下载体流动阻力变化极大，没有明显规律，因此需要在多个工况下测试，绘制流动阻力和工况点MAP图后对每个工况点单独进行判断是否烧毁，工作量浩大且不准确。
发明内容
基于此，针对上述技术问题，提供一种颗粒捕集器载体高温烧毁检测方法、***及诊断设备。
为解决上述技术问题，本发明采用如下技术方案：
一方面，提供一种颗粒捕集器载体高温烧毁检测方法，包括：
S101、监测颗粒捕集器载体的前温度以及后温度，并计算温差积累：温差积累＝前温度-后温度；
S102、若所述温差积累依次出现如下三种情况，则颗粒捕集器载体高温烧毁：
情况1：温差积累大于0；
情况2：温差积累小于0；
情况3：温差积累大于情况2的温差积累，且小于情况1的温差积累。
另一方面，提供一种颗粒捕集器载体高温烧毁检测***，包括存储模块，所述存储模块包括由处理器加载并执行的指令,所述指令在被执行时使所述处理器执行上述一种颗粒捕集器载体高温烧毁检测方法。
再一方面，提供一种诊断设备，该设备具有上述一种颗粒捕集器载体高温烧毁检测***。
本发明可以通过颗粒捕集器载体的温差积累的变化情况，自动实时检测到颗粒捕集器载体高温烧毁，不依靠流动阻力，方便且准确，实现及时更换载体，使PM量满足国Ⅵ排 放的法规要求，提高车辆使用安全性。
附图说明
下面结合附图和具体实施方式本发明进行详细说明：
图1为本发明的流程图；
图2为本发明的原理图；
图3为本发明的颗粒捕集器载体正常工作未烧毁时的温差积累示意图；
图4为本发明的颗粒捕集器载体发生烧毁时的温差积累示意图；
图5为本发明的颗粒捕集器载体烧毁后的温差积累示意图。
具体实施方式
如图1所示，本说明书实施例提供一种颗粒捕集器载体高温烧毁检测方法，包括：
S101、监测颗粒捕集器载体的前温度以及后温度，并计算温差积累：温差积累＝前温度-后温度。
S102、若温差积累依次出现如下三种情况，则颗粒捕集器载体高温烧毁:
情况1：温差积累大于0。
情况2：温差积累小于0。
情况3：温差积累大于情况2的温差积累，且小于情况1的温差积累。
否则，则颗粒捕集器载体未高温烧毁，可以继续使用。
如图3所示，颗粒捕集器载体正常工作未烧毁时，排气经过载体时会有一定的热损耗(主要由载体的蜂窝状结构造成)，这时载体后温度会小于载体前温度，温差积累大于0；如图4所示，当载体发生烧毁时，由于载体烧毁放热，载体前温度会小于载体后温度，温差积累会短暂小于0；如图5所示，在载体烧毁后，颗粒捕集器视为空载体，失去对排放的处理能力，排气经颗粒捕集器热损失减小，此时的温差积累小于载体正常工作未烧毁时的温差积累，但会大于载体发生烧毁时的温差积累，因此，当监测到温差积累依次出现上述三种情况后，可判断载体已烧毁，从而可以及时进行更换载体的提醒，使其保持过滤PM的能力。
在本实施例中，如图2所示，通过车辆ECU监测颗粒捕集器载体的前温度以及后温度，并计算温差积累，相应地，在步骤S102中，诊断设备可以通过OBD口从车辆ECU实时获取温差积累，进而判断颗粒捕集器载体是否烧毁。
其中，车辆ECU可以通过设置在颗粒捕集器载体两侧的两个温度传感器监测前温度以及后温度。
基于同一发明构思，本说明书实施例还提供一种颗粒捕集器载体高温烧毁检测***，包括存储模块，存储模块包括由处理器加载并执行的指令,指令在被执行时使处理器执行本说明书上述一种颗粒捕集器载体高温烧毁检测方法部分中描述的根据本发明各种示例性实施方式的步骤。
其中，存储模块可以包括易失性存储单元形式的可读介质，例如随机存取存储单元(RAM)和/或高速缓存存储单元，还可以进一步包括只读存储单元(ROM)。
可以以一种或多种程序设计语言的任意组合来编写用于执行本发明操作的程序代码，程序设计语言包括面向对象的程序设计语言—诸如Java、C++等，还包括常规的过程 式程序设计语言—诸如“C”语言或类似的程序设计语言。程序代码可以完全地在用户计算设备上执行、部分地在用户设备上执行、作为一个独立的软件包执行、部分在用户计算设备上部分在远程计算设备上执行、或者完全在远程计算设备或服务器上执行。在涉及远程计算设备的情形中，远程计算设备可以通过任意种类的网络，包括局域网(LAN)或广域网(WAN)，连接到用户计算设备，或者，可以连接到外部计算设备(例如利用因特网服务提供商来通过因特网连接)。
基于同一发明构思，本说明书实施例还提供一种诊断设备，该设备具有上述一种颗粒捕集器载体高温烧毁检测***，此处不再具体赘述。
但是，本技术领域中的普通技术人员应当认识到，以上的实施例仅是用来说明本发明，而并非用作为对本发明的限定，只要在本发明的实质精神范围内，对以上所述实施例的变化、变型都将落在本发明的权利要求书范围内。

Claims (5)

  1. 一种颗粒捕集器载体高温烧毁检测方法，其特征在于，包括：
    S101、监测颗粒捕集器载体的前温度以及后温度，并计算温差积累：温差积累＝前温度-后温度；
    S102、若所述温差积累依次出现如下三种情况，则颗粒捕集器载体高温烧毁：
    情况1：温差积累大于0；
    情况2：温差积累小于0；
    情况3：温差积累大于情况2的温差积累，且小于情况1的温差积累。
  2. 根据权利要求1所述的一种颗粒捕集器载体高温烧毁检测方法，其特征在于，通过车辆ECU监测颗粒捕集器载体的前温度以及后温度，并计算温差积累。
  3. 根据权利要求2所述的一种颗粒捕集器载体高温烧毁检测方法，其特征在于，所述步骤S102还包括：
    从所述车辆ECU实时获取所述温差积累。
  4. 一种颗粒捕集器载体高温烧毁检测***，其特征在于，包括存储模块，所述存储模块包括由处理器加载并执行的指令,所述指令在被执行时使所述处理器执行根据权利要求1-3任一项所述的一种颗粒捕集器载体高温烧毁检测方法。
  5. 一种诊断设备，其特征在于，具有根据权利要求4所述的一种颗粒捕集器载体高温烧毁检测***。
PCT/CN2021/101464 2021-01-22 2021-06-22 颗粒捕集器载体高温烧毁检测方法、***及诊断设备 WO2022156134A1 (zh)

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CN112901324A (zh) * 2021-01-22 2021-06-04 上海星融汽车科技有限公司 颗粒捕集器载体高温烧毁检测方法、***及诊断设备

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DE102012022153A1 (de) * 2012-11-10 2014-05-15 Volkswagen Aktiengesellschaft Verfahren zur Regeneration mindestens eines Partikelfilters, Steuereinrichtung und Kraftfahrzeug mit einer solchen
WO2015118856A1 (en) * 2014-02-10 2015-08-13 Toyota Jidosha Kabushiki Kaisha Control device for internal combustion engine
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