利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

86 条记录 (耗时 0.019 秒)

    ENGINE TEST METHOD, ENGINE TEST PROGRAM, AND ENGINE TEST APPARATUS
    1.
    发明公开
    ENGINE TEST METHOD, ENGINE TEST PROGRAM, AND ENGINE TEST APPARATUS 审中-公开

    公开(公告)号：EP4141404A1

    公开(公告)日：2023-03-01

    申请号：EP22191675.2

    申请日：2022-08-23

    申请人： Transtron Inc.

    发明人： Ogawa, Masatoshi ,  Degawa, Takuma

    IPC分类号： G01M15/08 ,  G01M15/10 ,  G01M15/05 ,  F02D41/14

    摘要： An engine test method that causes a computer to execute a process including, acquiring, a first test pattern in which an operation variable that is used for an engine test is changed in time series, inputting, based on the first test pattern, a first operation variable to a mathematical model that represents a time series response of an engine obtained by inputting a test pattern as a simulation of the engine test, monitoring, as a first monitoring parameter of engine abnormality, at least one of an air excess ratio, pressure and temperature of an intake manifold, pressure and temperature of an exhaust manifold, and a maximum cylinder pressure rise rate that are obtained by inputting the first operation variable to the mathematical model, holding, when the first monitoring parameter exceeds a first threshold value, the first operation variable until the first monitoring parameter is less than the first threshold value, creating, a history of the first operation variable in the simulation as a second test pattern, monitoring, as a second monitoring parameter, at least one of the air excess ratio, the pressure and the temperature of the intake manifold, the pressure and the temperature of the exhaust manifold, and the maximum cylinder pressure rise rate that are obtained by inputting a second operation variable to a real engine based on the second test pattern, holding, when the second monitoring parameter exceeds a second threshold value, the second operation variable until the second monitoring parameter is less than the second threshold value, and acquiring, time series data of the second operation variable and a controlled variable.

    DETECTING AND MITIGATING ABNORMAL COMBUSTION CHARACTERISTICS
    5.
    发明公开
    DETECTING AND MITIGATING ABNORMAL COMBUSTION CHARACTERISTICS 审中-公开

    公开(公告)号：EP3286541A1

    公开(公告)日：2018-02-28

    申请号：EP16782437

    申请日：2016-04-22

    申请人： WESTPORT POWER INC

    发明人： HUANG JIAN ,  LEE KEVIN DEREK

    IPC分类号： G01M15/05 ,  F02D41/22 ,  G01L23/22

    CPC分类号： F02D41/22 ,  F02D19/0623 ,  F02D19/105 ,  F02D35/024 ,  F02D35/027 ,  F02D35/028 ,  F02D41/0025 ,  F02D41/0027 ,  F02D2200/025 ,  G01M15/11 ,  Y02T10/36 ,  Y02T10/40

    摘要： Premixed engines including dual fuel engines can experience abnormal combustion characteristics including misfire, pre-ignition and knock. A method for detecting and mitigating abnormal combustion in an engine comprises sensing frequency components of an acoustic signal associated with a combustion chamber during a combustion cycle, the frequency components representative of at least one of a normal and an abnormal combustion characteristic; determining an in-cylinder pressure signal as a function of the acoustic signal; calculating as functions of the in- cylinder pressure signal at least one of a knock index, a gross indicated mean effective pressure and a start of combustion timing; detecting the abnormal combustion characteristic is at least one of (a) a misfire event when the gross indicated mean effective pressure is less than a predetermined mean effective pressure value; (b) a pre-ignition event when the start of combustion timing is advanced of a start of ignition timing; and (c) an engine knock event when the knock index is greater than a predetermined knock value; and performing a mitigation strategy for the detected abnormal combustion characteristic.

    A System for the precise determination of crankshaft angular position for fuel self-ignition, especially in the cylinder of diesel engine using Langmuir probe
    8.
    发明公开
    A System for the precise determination of crankshaft angular position for fuel self-ignition, especially in the cylinder of diesel engine using Langmuir probe 审中-公开
    一种用于准确地确定曲轴角度位置到燃料自燃，特别是柴油发动机的气缸与朗缪尔探针系统

    公开(公告)号：EP2793012A3

    公开(公告)日：2014-10-29

    申请号：EP14460001.2

    申请日：2014-01-23

    申请人： Instytut Maszyn Przeplywowych PAN. im. R. Szewalskiego ,  Energa Spolka Akcyjna

    发明人： Cenian, Adam ,  Piechowski, Leszek ,  Korczewski, Zbigniew ,  Rudnicki, Jacek ,  Cenian, Witold

    IPC分类号： G01M15/05 ,  F02P17/02 ,  G01M15/06 ,  G01M15/08 ,  F02D41/40 ,  F02D41/00 ,  F02D35/02 ,  G01L23/22

    CPC分类号： F02D35/021 ,  F02D35/023 ,  F02D35/028 ,  G01L23/221 ,  G01M15/05 ,  G01M15/06 ,  G01M15/08

    摘要： A system for monitoring of the fuel self-ignition angle, especially in the cylinder of a diesel engine applying Langmuir probe is described. A two-channel metal adapter (2) with pressure indicator (6) and Langmuir probe (3) is placed in an engine cylinder(1). In the indicator channel a pressure sensor (7) is placed, which generates a signal which is sent to the electronic pressure recorder (10). Langmuir probe (3) is connected with a power source (4) and signal amplification set-up (5), which is connected with the fuel self-ignition angle recorder (13). The monitoring system includes the Top Dead Centre (TDC) signal generator (8), which signal is transmitted to the TDC signal divider (9), which after galvanic separation is transmitted to the electronic pressure recorder (10), the vibration recorder (11), the crankshaft revolution timer (12) and the self-ignition angle recorder (13). The vibrational sensor (16), sends its signals to the vibration recorder (11) but the signal from the self-ignition angle recorder (13) is sent to numerical indicator of self-ignition angle (15) and the signal determining the value of angular velocity to its numerical indicator (14); finally, export of data from the self-ignition angle recorder (13) is performed through data transmission set-up (17) to external monitoring systems.
    An alternative system for monitoring of the fuel self-ignition angle (presented in Fig. 2) contains a pulsed, rotating transducer (18) generating 3600 pulses per crankshaft revolution (0,1 ° CA) - replacing less precise determination of TDC by an inductive sensor. The rotating transducer (18) generates TDC signal, which is transmitted to the signal divider (9).
    Advantage of the invented monitoring system is placement of the Langmuir probe in engine cylinder, which enable direct determination of moment of fuel ignition in working engine.