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    • 8. 发明授权
    • Altitude simulator for dynamometer testing
    • 用于测功机测试的海拔模拟器
    • US06561014B1
    • 2003-05-13
    • US09694078
    • 2000-10-20
    • James Craig SmithPeter James MaloneyMatt Osterhout
    • James Craig SmithPeter James MaloneyMatt Osterhout
    • G01M1500
    • G01M15/00F01N11/00G01M15/02
    • A method and apparatus for conducting dynamometric testing of an internal combustion engine at a test site under a simulated atmospheric pressure that differs substantially from an actual ambient atmospheric pressure existing at the test site. The internal combustion engine has an air inlet for supplying an intake airflow for combustion within the internal combustion engine and an exhaust outlet for exhausting an exhaust flow exiting from the internal combustion engine. The method includes the steps of subjecting the air inlet to the simulated atmospheric pressure, subjecting the exhaust outlet to the simulated atmospheric pressure and operating the internal combustion engine while both of the air inlet and the exhaust outlet are subjected to the simulated atmospheric pressure. The apparatus includes an exhaust pressure controller for maintaining the exhaust outlet of the internal combustion engine substantially equal to a determined exhaust pressure during operation of the internal combustion engine and an intake pressure controller for maintaining the air inlet of the internal combustion engine substantially equal to a determined intake pressure during operation of the internal combustion engine.
    • 一种用于在模拟大气压力下在试验部位进行内燃机的测力试验的方法和装置,其显着不同于存在于试验现场的实际环境大气压力。 内燃机具有用于在内燃机内供给用于燃烧的进气气流的空气入口和用于排出从内燃机排出的排气流的排气口。 该方法包括以下步骤:对空气入口进行模拟的大气压力,使排气出口达到模拟的大气压力,并且在空气入口和排气出口都受到模拟的大气压力的同时操作内燃机。 该装置包括排气压力控制器,用于在内燃机的运行期间将内燃机的排气出口基本上等于确定的排气压力,以及用于将内燃机的进气口保持在基本上等于 确定内燃机运转中的进气压力。
    • 9. 发明授权
    • Flow-based control method for an engine control valve
    • 一种用于发动机控制阀的基于流量的控制方法
    • US06293267B1
    • 2001-09-25
    • US09532431
    • 2000-03-23
    • James Craig SmithPeter James Maloney
    • James Craig SmithPeter James Maloney
    • F02M2507
    • F02D41/0077F02D35/0007F02D2041/1433F02M26/47F02M26/48F02M26/72Y02T10/47
    • An improved control methodology for an engine control valve, in which the valve is positioned in response to a commanded flow rate of the controlled medium. The method involves a valve characterization procedure in which the actual flow rate is measured for various combinations of valve position and pressure ratio across the valve, subject to a standard set of upstream pressure and temperature values. This results in a table of valve position in terms of pressure ratio and standard flow rate—that is, flow rate under the standard upstream pressure and temperature values. In operation, a controller addresses the table to obtain the desired valve position as a function of a determined pressure ratio across the valve, and a desired standard flow rate determined based on the commanded flow rate and the pressure and temperature of the controlled medium upstream of the valve, relative to the standard pressure and temperature values. The required calibration effort is significantly reduced compared to the usual ad-hoc approach, and the control is based on the physical characteristics of the valve so that the commanded flow rate can be scheduled based on engine control considerations. Additionally, the control is modular in nature, which minimizes the re-design and re-calibration efforts required due to changes in system design.
    • 一种用于发动机控制阀的改进的控制方法,其中阀被响应于受控介质的指令流量而定位。 该方法涉及阀门表征程序,其中针对阀门的阀位置和压力​​比的各种组合来测量实际流速,受制于一组标准的上游压力和温度值。 这就产生了压力比和标准流量 - 即在标准上游压力和温度值下的流量的阀门位置表。 在操作中,控制器处理该表以获得所需阀位置,作为跨过该阀的确定的压力比的函数,以及基于所指示的流量和受控介质的压力和温度确定的期望标准流量 阀门相对于标准压力和温度值。 与通常的ad-hoc方法相比,所需的校准工作量显着降低,并且控制基于阀的物理特性,使得可以基于发动机控制考虑来调度指令流量。 此外,该控件本质上是模块化的,这最大限度地减少了由于系统设计的变化所需的重新设计和重新校准工作。