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公开(公告)号：US11434842B1
公开(公告)日：2022-09-06
申请号：US17181231
申请日：2021-02-22
Applicant: Caterpillar Inc.
Inventor： Brett A. Zook , Christopher F. Gallmeyer , Karthik Jayasankaran , Kamalakannan Thammireddi Vajram
Abstract: Operating a gaseous fuel engine system includes determining a detonation level in combustion cylinders in an engine in the gaseous fuel engine system, comparing the detonation level to a detonation level limit, calculating a detonation error, and limiting an engine load of the engine to a derated engine load level based on a reduction to intake manifold air pressure (IMAP) that is performed responsive to the detonation error. The gaseous fuel engine system can be operated at a reduced, derated engine load, rather than being shut down, and permitted to increase in engine load level as detonation events clear. Related control logic and structure are disclosed.
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公开(公告)号：US11359557B2
公开(公告)日：2022-06-14
申请号：US16884657
申请日：2020-05-27
Applicant: Caterpillar Inc.
Inventor： Karthik Jayasankaran , Joshua T. Annin , Christopher F. Gallmeyer , Alex M. Kubiak , Kamalakannan Thammireddi Vajram
Abstract: A method for controlling an internal combustion engine includes receiving a request for a desired output from the internal combustion engine, receiving sensor information indicative of at least an engine speed or a pressure of gas provided to the internal combustion engine, and setting a changeable limit associated with a supply of air and fuel to the internal combustion engine. The method also includes, based at least in part on the received sensor information, changing the changeable limit to define a changed limit and reducing an output of the internal combustion engine based on the changed limit.
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公开(公告)号：US20220268232A1
公开(公告)日：2022-08-25
申请号：US17181231
申请日：2021-02-22
Applicant: Caterpillar Inc.
Inventor： Brett A. Zook , Christopher F. Gallmeyer , Karthik Jayasankaran , Kamalakannan Thammireddi Vajram
Abstract: Operating a gaseous fuel engine system includes determining a detonation level in combustion cylinders in an engine in the gaseous fuel engine system, comparing the detonation level to a detonation level limit, calculating a detonation error, and limiting an engine load of the engine to a derated engine load level based on a reduction to intake manifold air pressure (IMAP) that is performed responsive to the detonation error. The gaseous fuel engine system can be operated at a reduced, derated engine load, rather than being shut down, and permitted to increase in engine load level as detonation events clear. Related control logic and structure are disclosed.
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公开(公告)号：US10151256B2
公开(公告)日：2018-12-11
申请号：US15829361
申请日：2017-12-01
Applicant: Caterpillar Inc.
Inventor： Karthik Jayasankaran , Arvind Sivasubramanian , Lingqian Yuan , James J. Cress , David J. Lin , Joshua T. Annin
IPC: F02D41/00 , F02B37/10 , F02M35/10 , F02M35/104 , F02D41/26
Abstract: A control system and method to control cold transient response of an engine. The control system can provide compressed air from a compressed air source to a turbocharger to boost speed of a turbine of the turbocharger, based on determined desired operating characteristics associated with upstream or downstream operation of the engine relative to the turbocharger. The control system can receive data corresponding to actual operating characteristics associated with the upstream or downstream operation of the engine relative to the turbocharger, compare the desired operating characteristics with the data corresponding to actual operating characteristics, and control the air assist from the compressed air source based on the comparison.
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Patent Agency Ranking
公开(公告)号：US20160061134A1
公开(公告)日：2016-03-03
申请号：US14469618
申请日：2014-08-27
Applicant: Caterpillar Inc.
Inventor： Matthew P. Fletcher , Adwait V. Joshi , Matthew Mowers , Brandon Abel , Deepti Bhosekar , Karthik Jayasankaran
CPC classification number: F02D41/1446 , F01N3/18 , F02D41/0275 , F02D41/146 , F02D41/22
Abstract: An engine control system including an engine configured to generate exhaust comprising an exhaust constituent and to operate in a first operating mode or a second operating mode different from the first operating mode. The engine control system can include a plurality of sensors configured to generate temperature data corresponding to at least one of a measured exhaust temperature and an ambient temperature, and exhaust constituent data corresponding to an exhaust constituent concentration. The engine control system can include a controller operatively coupled to the plurality of sensors and the engine, and configured to receive the temperature data and the exhaust constituent data from the plurality of sensors, and change an operating state of the engine from the first operating mode to the second operating mode when the temperature data is less than a predetermined temperature threshold and the exhaust constituent data is greater than a predetermined exhaust constituent threshold.
Abstract translation: 一种发动机控制系统，其包括被配置为产生排气的发动机，所述排气包括排气成分并且在不同于所述第一操作模式的第一操作模式或第二操作模式下操作。 发动机控制系统可以包括多个传感器，其被配置为产生对应于测量的排气温度和环境温度中的至少一个的温度数据，以及对应于排气成分浓度的排气成分数据。 发动机控制系统可以包括可操作地耦合到多个传感器和发动机的控制器，并被配置为从多个传感器接收温度数据和排气构成数据，并且从第一操作模式改变发动机的运行状态 当温度数据小于预定温度阈值并且排气成分数据大于预定排气成分阈值时，到第二操作模式。
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公开(公告)号：US11149667B1
公开(公告)日：2021-10-19
申请号：US17016895
申请日：2020-09-10
Applicant: Caterpillar Inc.
Inventor： Julia H. Jenks , Karthik Jayasankaran , Shivangi Wagle , Kevin Sergott , Kosha B. Patel
Abstract: An internal combustion engine includes an inline turbocharger and at least a first inline turbocharger that has a first turbine air valve, and a first inline compressor that has a first compressor air valve. A control valve is responsive to commands from an electronic controller to move the air valves between open and closed positions. The electronic controller monitors operating parameters of the engine to diagnose a fault. determine whether an air valve is stuck open or closed, and adjust a priority schedule for activating or deactivating the first inline turbocharger based on the type of fault.
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公开(公告)号：US10378457B2
公开(公告)日：2019-08-13
申请号：US15805297
申请日：2017-11-07
Applicant: Caterpillar Inc.
Inventor： Karthik Jayasankaran , Arvind Sivasubramanian
Abstract: An engine speed control system for an internal combustion engine includes a throttle, and a sensor that monitors a parameter indicative of pressure or density of fuel and air in an inlet manifold of the engine. The electronic control unit is coupled with the throttle and the sensor and structured to calculate a target mass flow through the throttle, a feedforward control term based on the target mass flow, and a feedforward control term based on data produced by the sensor. The electronic control unit is further structured to vary a position of the throttle based on the feedforward and feedback control terms to adjust a mass flow through the throttle toward the target mass flow. The control system is applicable in throttle governed as well as fuel governed systems.
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公开(公告)号：US20190136769A1
公开(公告)日：2019-05-09
申请号：US15805297
申请日：2017-11-07
Applicant: Caterpillar Inc.
Inventor： Karthik Jayasankaran , Arvind Sivasubramanian
CPC classification number: F02D9/02 , F02D11/105 , F02D19/023 , F02D41/0002 , F02D41/0007 , F02D41/0027 , F02D41/18 , F02D2009/0228 , F02D2041/141 , F02D2200/0406 , F02D2200/0414 , F02D2200/0611
Abstract: An engine speed control system for an internal combustion engine includes a throttle, and a sensor that monitors a parameter indicative of pressure or density of fuel and air in an inlet manifold of the engine. The electronic control unit is coupled with the throttle and the sensor and structured to calculate a target mass flow through the throttle, a feedforward control term based on the target mass flow, and a feedforward control term based on data produced by the sensor. The electronic control unit is further structured to vary a position of the throttle based on the feedforward and feedback control terms to adjust a mass flow through the throttle toward the target mass flow. The control system is applicable in throttle governed as well as fuel governed systems.
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公开(公告)号：US08834820B1
公开(公告)日：2014-09-16
申请号：US13918059
申请日：2013-06-14
Applicant: Caterpillar Inc.
Inventor： Matthew Mowers , Karthik Jayasankaran , Deepti Bhosekar , Jason Bloms , Joshua Ratts , Aaron Harmon
CPC classification number: F01N3/208 , B01D53/9431 , B01D53/9495 , F01N2550/02 , F01N2610/02 , F01N2900/0411 , F01N2900/1812 , Y02T10/24
Abstract: An emissions control system includes a Selective Catalytic Reduction (SCR) device, one or more monitoring devices and one or more sensors. The system further includes a controller configured to determine an operating emissions gas conversion ratio of the SCR device. The controller is further configured to determine an injection amount of a reduction agent to maintain an operating emissions gas conversion ratio of the SCR device and to adjust the operating emissions gas conversion ratio to a target emissions gas conversion ratio by adjusting the injection amount of the reduction agent to the SCR device. The system utilizes a Time-Temperature model to determine the target emissions gas conversion ratio and/or reduction agent injection ratio. The system further includes a reduction agent injector configured to supply the adjusted injection amount of the reduction agent to the SCR device.
Abstract translation: 排放控制系统包括选择性催化还原（SCR）装置，一个或多个监测装置和一个或多个传感器。 该系统还包括被配置为确定SCR装置的操作排放气体转化率的控制器。 所述控制器还被配置为确定还原剂的喷射量以维持SCR装置的操作排放气体转化率，并且通过调节所述还原剂的喷射量来将所述操作排放气体转化率调整为目标排放气体转化率 代理到SCR设备。 该系统利用时间 - 温度模型来确定目标排放气体转化率和/或还原剂注入比。 该系统还包括还原剂喷射器，该还原剂喷射器构造成将还原剂的调节喷射量提供给SCR装置。
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