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    • 1. 发明授权
    • Passive model-based EGR diagnostic
    • 被动型基于EGR诊断
    • US06763708B2
    • 2004-07-20
    • US09919489
    • 2001-07-31
    • Thomas L. TingJohn F. Van Gilder
    • Thomas L. TingJohn F. Van Gilder
    • G01M1900
    • F02D41/0072F02D41/145F02D41/187F02D41/221F02D2200/0402F02D2200/0406F02D2200/0408F02D2200/703Y02T10/47
    • A process for computer based, wholly passive, diagnosis of an automotive vehicle exhaust gas recirculation system is disclosed. Use is made of any suitable math model of the vehicle's air intake system to estimate the absolute pressure in the intake manifold, MAP, assuming both a healthy EGR system, MAPHE, and a faulty EGR valve, MAPFE. Both estimated values are compared with the actual normally measured manifold pressure, MAPmeas. Both comparisons are repeated over many calculations and the differences analyzed to reliably determine whether there is a real restriction to recirculated exhaust flow. A preferred math model of the intake system uses as input variables: mass air flow, barometric pressure, the position command for the EGR valve and engine speed.
    • 公开了一种用于基于计算机的,完全被动的诊断汽车废气再循环系统的方法。 使用车辆进气系统的任何合适的数学模型来估计进气歧管MAP中的绝对压力,假设健康的EGR系统MAPHE和故障EGR阀MAPFE。 将两个估计值与实际通常测量的歧管压力MAPmeas进行比较。 在许多计算中重复了两次比较,并且分析的差异可靠地确定是否对再循环排气流有实际限制。 进气系统的优选数学模型用作输入变量:质量空气流量,大气压力,EGR阀的位置指令和发动机转速。
    • 2. 发明授权
    • Fault identification diagnostic for intake system sensors
    • 进气系统传感器的故障识别诊断
    • US06701282B2
    • 2004-03-02
    • US09961537
    • 2001-09-20
    • Thomas L. TingJohn F. Van Gilder
    • Thomas L. TingJohn F. Van Gilder
    • G06F500
    • F02D41/22F02D11/107F02D41/1401F02D41/187F02D2200/0402F02D2200/0404F02D2200/0406F02D2200/704Y02T10/40
    • A fault identification system for intake system sensors according to the invention includes a throttle position sensor (TPS), a manifold absolute pressure (MAP) sensor, and a mass airflow (MAF) sensor. A diagnostic controller is coupled to the TPS, the MAP sensor and the MAF sensor. The diagnostic controller implements a throttle model, a first intake model and a second intake model and correctly identifies faults in the TPS, the MAP sensor and the MAF sensor. The throttle model generates a mass airflow estimate. The first intake model generates a first MAP estimate. The second intake model generates a second MAP estimate. The diagnostic controller applies residual calculations on outputs of the throttle model, the first intake model and the second intake model. The diagnostic controller applies a first order lag filter on the residual calculations. The diagnostic controller accesses a truth table to identify faults in the TPS, the MAP sensor and the MAF sensor.
    • 根据本发明的进气系统传感器的故障识别系统包括节气门位置传感器(TPS),歧管绝对压力(MAP)传感器和质量气流(MAF)传感器。 诊断控制器耦合到TPS,MAP传感器和MAF传感器。 诊断控制器实现节气门模型,第一进气模型和第二进气模型,并且正确识别TPS,MAP传感器和MAF传感器中的故障。 节气门模型产生质量气流估计。 第一个摄像模型生成第一个MAP估计。 第二进气模型产生第二MAP估计。 诊断控制器对油门模型,第一进气模型和第二进气模型的输出进行残差计算。 诊断控制器对残差计算器应用一阶滞后滤波器。 诊断控制器访问真值​​表以识别TPS,MAP传感器和MAF传感器中的故障。
    • 6. 发明授权
    • Adaptive throttle model for air intake system diagnostic
    • 进气系统诊断的自适应油门模型
    • US07266442B2
    • 2007-09-04
    • US11226063
    • 2005-09-14
    • Thomas L. TingBruce K. Walker
    • Thomas L. TingBruce K. Walker
    • G06F19/00G01L3/26
    • F02D41/0002F02D41/187F02D41/22F02D41/2432F02D41/2451F02D2200/0404F02D2200/703Y02T10/42
    • A method and system to optimize values of a plurality of calibration discharge coefficients useable in a computer program operable to estimate mass air flow into an internal combustion engine having an air intake system comprising a throttle body and a plurality of sensors is presented. This includes collecting engine operation data points, including throttle position. Discharge coefficients are calculated, one for each engine operation data point. The discharge coefficients are partitioned based upon throttle position. Calibration discharge coefficients are calculated for each partitioned plurality of discharge coefficients. This includes circumscribing each calibration discharge coefficient based upon predetermined thresholds. This further includes monitoring and collecting input signals correlatable to airflow from the sensors during ongoing engine operation, preferably comprising throttle position, manifold pressure, intake air temperature, and, atmospheric pressure.
    • 提出了一种用于优化可用于计算机程序中的多个校准排放系数的值的方法和系统,所述计算机程序可用于估计进入具有包括节气门体和多个传感器的进气系统的内燃机的大气流。 这包括收集发动机运行数据点,包括油门位置。 计算放电系数,每个发动机运转数据点一个。 排气系数根据油门位置进行分配。 对于每个分隔的多个放电系数计算校准放电系数。 这包括基于预定阈值限制每个校准排出系数。 这进一步包括在正在进行的发动机运行期间监测和收集与来自传感器的气流相关的输入信号,优选地包括节气门位置,歧管压力,进气温度和大气压力。