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    • 5. 发明申请
    • HYDROCARBON CONVERSION DIAGNOSTIC
    • 石油转化诊断
    • US20120227380A1
    • 2012-09-13
    • US13045620
    • 2011-03-11
    • Rebecca A. OemkeSteve L. Melby
    • Rebecca A. OemkeSteve L. Melby
    • F01N9/00F01N3/10
    • F01N13/02F01N3/0253F01N3/106F01N9/002F01N11/002F01N11/005F01N2550/24F01N2560/06F01N2610/03F01N2900/1602Y02T10/47
    • A system includes an engine configured to operate in a first operating state and a second operating state, a particulate filter configured to receive exhaust gas from the engine and filter particulate matter from the exhaust gas, and an oxidation catalyst configured to generate heat to increase a temperature of the exhaust gas during a regeneration process. A sensor is configured to measure an actual temperature of the exhaust gas during the regeneration process. A controller is configured to define a fuel conversion factor based, at least in part, on the actual temperature and an expected temperature of the exhaust gas. The controller is further configured to analyze the fuel conversion factor over time relative to at least one of the first and second operating states of the engine and diagnose a fault in the regeneration process based, at least in part, on the fuel conversion factor.
    • 一种系统包括被配置为在第一操作状态和第二操作状态下操作的发动机,微粒过滤器,被配置为接收来自发动机的废气和从废气中过滤颗粒物质,以及氧化催化剂,其配置成产生热量以增加 在再生过程中废气的温度。 传感器被配置成在再生过程中测量废气的实际温度。 控制器被配置为至少部分地基于废气的实际温度和预期温度来定义燃料转换因子。 控制器还被配置成分析相对于发动机的第一和第二操作状态中的至少一个的时间上的燃料转换因子,并且至少部分地基于燃料转换因子来诊断再生过程中的故障。
    • 8. 发明授权
    • Hydrocarbon conversion diagnostic
    • 烃转化诊断
    • US08826645B2
    • 2014-09-09
    • US13045620
    • 2011-03-11
    • Rebecca A. OemkeSteve L. Melby
    • Rebecca A. OemkeSteve L. Melby
    • F01N3/00F01N11/00F01N13/02F01N9/00F01N3/025F01N3/10
    • F01N13/02F01N3/0253F01N3/106F01N9/002F01N11/002F01N11/005F01N2550/24F01N2560/06F01N2610/03F01N2900/1602Y02T10/47
    • A system includes an engine configured to operate in a first operating state and a second operating state, a particulate filter configured to receive exhaust gas from the engine and filter particulate matter from the exhaust gas, and an oxidation catalyst configured to generate heat to increase a temperature of the exhaust gas during a regeneration process. A sensor is configured to measure an actual temperature of the exhaust gas during the regeneration process. A controller is configured to define a fuel conversion factor based, at least in part, on the actual temperature and an expected temperature of the exhaust gas. The controller is further configured to analyze the fuel conversion factor over time relative to at least one of the first and second operating states of the engine and diagnose a fault in the regeneration process based, at least in part, on the fuel conversion factor.
    • 一种系统包括被配置为在第一操作状态和第二操作状态下操作的发动机,微粒过滤器,被配置为接收来自发动机的废气和从废气中过滤颗粒物质,以及氧化催化剂,其配置成产生热量以增加 在再生过程中废气的温度。 传感器被配置成在再生过程中测量废气的实际温度。 控制器被配置为至少部分地基于废气的实际温度和预期温度来定义燃料转换因子。 控制器还被配置成分析相对于发动机的第一和第二操作状态中的至少一个的时间上的燃料转换因子,并且至少部分地基于燃料转换因子来诊断再生过程中的故障。
    • 10. 发明授权
    • Leak detection method for an evaporative emission system including a flexible fuel tank
    • 包括柔性燃油箱的蒸发排放系统的泄漏检测方法
    • US06807847B2
    • 2004-10-26
    • US10080244
    • 2002-02-21
    • Michael J. StecklerSteve L. Melby
    • Michael J. StecklerSteve L. Melby
    • G01M304
    • F02M25/089F02M25/0809F02M2025/0845
    • An improved method of testing for evaporative emission system leaks monitors vacuum decay in a closed system so that the effects of fuel tank expansion during the test interval are minimized. In a first embodiment pass/fail criteria are established in terms of the time required for the system pressure to decay by a calibrated amount for a predetermined leak size. A leak at least as large as the predetermined leak is detected if the measured time is shorter than a calibrated time. The effects of fuel tank expansion are minimized because the changes in fuel tank volume occur primarily due to the pressure differential across the tank, as opposed to the leak size, and the changes that occur during the test are essentially the same for any leak size under consideration. In a second embodiment, the pass/fail criteria are established in terms of the change in pressure that occurs in the calibrated time; a leak at least a large as the predetermined leak is detected if the measured change in pressure is larger than the calibrated pressure amount.
    • 一种改进的蒸发排放系统泄漏测试方法可以监测封闭系统中的真空衰减,从而使测试间隔期间燃油箱膨胀的影响最小化。 在第一实施例中,根据预定泄漏尺寸的系统压力衰减校准量所需的时间来建立通过/不合格标准。 如果测量的时间短于校准时间,则检测至少与预定泄漏一样大的泄漏。 燃料箱膨胀的影响被最小化,因为燃料箱体积的变化主要是由于罐体上的压差而不同于泄漏尺寸,并且在试验期间发生的变化对于任何泄漏尺寸基本相同 考虑。 在第二实施例中,通过/失败标准是根据在校准时间内发生的压力变化来建立的; 如果所测量的压力变化大于校准压力量,则检测到预定泄漏量至少大的泄漏。