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Patent Agency Ranking
公开(公告)号：US10041432B2
公开(公告)日：2018-08-07
申请号：US15401911
申请日：2017-01-09
Applicant: Caterpillar Inc.
Inventor： Daniel Reese Puckett , Bradley Scott Bashore , Michael Edward Sattler , Michael Scott Marchionda , Sasidhar Rayasam , Kranti Kumar Nellutla
CPC classification number: F02D41/3082 , F02D41/042 , F02D41/3836 , F02D41/3863 , F02D2041/224 , F02D2041/225 , F02D2200/0602 , F02D2200/101 , F02M55/025 , F02M63/0265 , F02M2200/247
Abstract: A fuel system is disclosed for use with an engine. The fuel system may have a plurality of fuel injectors, a common rail fluidly, a pump, and an outlet valve associated with the pump. The fuel system may also have a sensor configured to generate a signal indicative of a pressure of fuel in the common rail, and an electronic control module. The electronic control module may be configured to detect a zero-fueling condition, to determine a first pressure decay rate of the common rail during the zero-fueling condition while the pump is rotating, and to determine a second pressure decay rate of the common rail during the zero-fueling condition after the pump has stopped rotating. The electronic control module may also be configured to selectively generate a diagnostic flag associated with wear of the outlet valve based on the first and second pressure decay rates.
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公开(公告)号：US09394848B2
公开(公告)日：2016-07-19
申请号：US14153485
申请日：2014-01-13
Applicant: Caterpillar Inc.
Inventor： Daniel Reese Puckett , Bryan Moore , Michael Edward Sattler , Prasanna Mohan Ballal , Bradley Scott Bashore , Kranti Kumar Nellutla
CPC classification number: F02M47/027 , F02D41/20 , F02D41/3082 , F02D41/3836 , F02D2041/2044 , F02D2041/2051 , F02D2041/2055 , F02D2041/2058 , F02M51/0625 , F02M63/0022 , F02M63/0075
Abstract: Fuel is injected by energizing a solenoid of a fuel injector for an on-time that terminates at a first end-of-current timing. An end-of-current trim is determined at least in part by estimating a duration between an induced current event in a circuit of the solenoid and a valve/armature interaction event. An induced current event occurs when an armature abruptly stops, and a valve/armature interaction event occurs when the armature couples with or de-couples from the valve member. Fuel is injected in a subsequent injection event by adjusting the end-of-current timing by the end-of-current trim.
Abstract translation: 通过为燃料喷射器的螺线管通电导通时间来燃料燃料，该导通时间终止于第一个电流结束定时。 至少部分地通过估计螺线管的电路中的感应电流事件与阀/电枢相互作用事件之间的持续时间来确定电流终止。 当电枢突然停止时发生感应电流事件，并且当电枢与阀构件耦合或解耦时，发生阀/电枢相互作用事件。 通过将电流终止时间调整为电流截止电流，在后续的注入事件中注入燃料。
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公开(公告)号：US20150198110A1
公开(公告)日：2015-07-16
申请号：US14153485
申请日：2014-01-13
Applicant: Caterpillar, Inc.
Inventor： Daniel Reese Puckett , Bryan Moore , Michael Edward Sattler , Prasanna Mohan Ballal , Bradley Scott Bashore , Kranti Kumar Nellutla
CPC classification number: F02M47/027 , F02D41/20 , F02D41/3082 , F02D41/3836 , F02D2041/2044 , F02D2041/2051 , F02D2041/2055 , F02D2041/2058 , F02M51/0625 , F02M63/0022 , F02M63/0075
Abstract: Fuel is injected by energizing a solenoid of a fuel injector for an on-time that terminates at a first end-of-current timing. An end-of-current trim is determined at least in part by estimating a duration between an induced current event in a circuit of the solenoid and a valve/armature interaction event. An induced current event occurs when an armature abruptly stops, and a valve/armature interaction event occurs when the armature couples with or de-couples from the valve member. Fuel is injected in a subsequent injection event by adjusting the end-of-current timing by the end-of-current trim.
Abstract translation: 通过为燃料喷射器的螺线管通电导通时间来燃料燃料，该导通时间终止于第一个电流结束定时。 至少部分地通过估计螺线管的电路中的感应电流事件与阀/电枢相互作用事件之间的持续时间来确定电流终止。 当电枢突然停止时发生感应电流事件，并且当电枢与阀构件耦合或解耦时，发生阀/电枢相互作用事件。 通过将电流终止时间调整为电流截止电流，在后续的注入事件中注入燃料。
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公开(公告)号：US10711726B2
公开(公告)日：2020-07-14
申请号：US15803049
申请日：2017-11-03
Applicant: Caterpillar Inc.
Inventor： James Steven Ulstad , Ye Tian , Purvarag S. Shah , Kranti Kumar Nellutla , Sasidhar Rayasam , Brian P. Brennan , Purna Chandra Sekhar Mokkarala , Mohammed Rafi H , Gregory Lance Armstrong
Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.
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公开(公告)号：US20190136787A1
公开(公告)日：2019-05-09
申请号：US15803049
申请日：2017-11-03
Applicant: Caterpillar Inc
Inventor： James Steven Ulstad , Ye Tian , Purvarag S. Shah , Kranti Kumar Nellutla , Sasidhar Rayasam , Brian P. Brennan , Purna Chandra Sekhar Mokkarala , Mohammed Rafi H , Gregory Lance Armstrong
IPC: F02D41/38
CPC classification number: F02D41/3863 , F02D19/022 , F02D41/3845 , F02D2200/0602
Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.
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