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公开(公告)号：US20220090953A1
公开(公告)日：2022-03-24
申请号：US17028540
申请日：2020-09-22
Applicant: Caterpillar Inc.
Inventor： Joshua Thomas Perko , Michael Joseph Campagna , Matthew Jordan Engfehr , Balasubramanian Ramachandran
Abstract: A fuel level measurement system and method for liquified natural gas (LNG) powered machines is disclosed. An engine control module (ECM) receives fuel line pressure levels at a first time (e.g., a key-off event) and, again, at a second time (e.g., a key-on event). The ECM predicts an expected change in pressure from the key-off event to the key-on event based on various factors. If the change in pressure detected is greater than a threshold level different from the predicted change in pressure, the ECM determines a fill event and resets a current fuel level. The ECM tracks mass flow commands used to provide fuel to the engine to determine the consumption of fuel from the fuel tank and to determine a new current fuel level based on the amount of fuel consumed. The current fuel level is displayed on a fuel gauge.
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公开(公告)号：US20160348605A1
公开(公告)日：2016-12-01
申请号：US15230635
申请日：2016-08-08
Applicant: Caterpillar Inc.
Inventor： Joshua Thomas Perko , Roderick Scott Zehrung , Matthew Jordan Engfehr
CPC classification number: F02D19/022 , F02D19/027 , F02D2200/0606 , F02M21/0215 , F02M21/0221 , F02M21/0242 , F02M21/06 , Y02T10/32
Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a tank, a temperature sensor, a delivery conduit, a heat exchanger, a control valve, a check valve, a bypass conduit, a bypass valve, and a controller. The controller is configured to receive a signal indicative of a temperature of a fuel present within the tank. The controller is also configured to control the control valve to selectively reverse at least a portion of the fuel in a gaseous state from the heat exchanger to the tank through the bypass conduit based, at least in part, on the received signal. The portion of the fuel is adapted to raise the temperature of the fuel present within the tank.
Abstract translation: 提供了一种用于发动机的燃料输送系统。 燃料输送系统包括罐，温度传感器，输送管，热交换器，控制阀，止回阀，旁通管，旁通阀和控制器。 控制器被配置为接收指示存在于罐内的燃料的温度的信号。 控制器还被配置为至少部分地基于所接收的信号，来控制控制阀，以选择性地将至少一部分处于气态的燃料从热交换器通过旁通管路转回到箱中。 燃料的一部分适于提高存在于罐内的燃料的温度。
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公开(公告)号：US11731504B2
公开(公告)日：2023-08-22
申请号：US17173035
申请日：2021-02-10
Applicant: Caterpillar Inc.
Inventor： Joshua Thomas Perko , Matthew Jordan Engfehr
IPC: B60K15/03
CPC classification number: B60K15/03 , B60K2015/03013 , B60K2015/03217
Abstract: A fuel system for a machine may include a fuel tank configured to hold cryogenic fuel, a pressure sensor, and an electronic control module (ECM). The ECM may determine a change in pressure of the fuel between a first time and a second time, determine a predicted change in pressure of the fuel between the first time and the second time, and determine that the change in pressure and the predicted change in pressure is greater than a threshold. Based on the change in pressure and the predicted change in pressure being greater than the threshold, a notification may be displayed associated with an integrity of the fuel tank.
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公开(公告)号：US20180223745A1
公开(公告)日：2018-08-09
申请号：US15423905
申请日：2017-02-03
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
CPC classification number: F02D19/081 , F02D19/0647 , F02D41/0025 , F02D41/0027 , F02D41/0082 , F02D41/0087 , F02D2250/21 , Y02T10/36
Abstract: An engine control system includes a dual fuel internal combustion engine, a fuel system including a liquid fuel source and a gaseous fuel source, and a controller. The engine control system further includes a liquid fuel control module and at least one gaseous fuel control module associated with a first and second subset of cylinders, each communicatively connected over a network. The controller has an operating mode and a cylinder deactivation mode. The controller in the operating mode is configured to instruct the liquid fuel control module and the at least one gaseous fuel control module to operate the plurality of cylinders in a dual fuel mode. The controller in the cylinder deactivation mode transitions the plurality of cylinders to a liquid-fuel only mode over a phase out period, deactivates the first subset of cylinders, and then transitions to the dual fuel mode in the second subset of cylinders.
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公开(公告)号：US11608937B2
公开(公告)日：2023-03-21
申请号：US16777374
申请日：2020-01-30
Applicant: Caterpillar Inc.
Inventor： Brian M. Bevard , Derek Samsel , Manikandan Natarajan , Joshua Perko , Matthew Jordan Engfehr , Roderick S. Zehrung
Abstract: In accordance with one aspect of the present disclosure, a mobile machine includes a LNG fuel tank to provide natural gas to a natural gas engine, a pressure relief valve to relieve pressure to a relief vent line, and a liquid separation device. The liquid separation device includes a canister defining an interior space and having a top end and a bottom end, a LNG inlet configured to receive mixed phase fluid into the canister from the relief vent line, a separator disposed within the interior space and fluidly connected to the LNG inlet, the separator configured to direct condensed liquid to the bottom end and to pass vapor to the interior space, a vapor outlet disposed on the top end of the canister, and a liquid drain disposed on the bottom end of the canister.
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Patent Agency Ranking
公开(公告)号：US20220250465A1
公开(公告)日：2022-08-11
申请号：US17173035
申请日：2021-02-10
Applicant: Caterpillar Inc.
Inventor： Joshua Thomas Perko , Matthew Jordan Engfehr
IPC: B60K15/03
Abstract: A fuel system for a machine may include a fuel tank configured to hold cryogenic fuel, a pressure sensor, and an electronic control module (ECM). The ECM may determine a change in pressure of the fuel between a first time and a second time, determine a predicted change in pressure of the fuel between the first time and the second time, and determine that the change in pressure and the predicted change in pressure is greater than a threshold. Based on the change in pressure and the predicted change in pressure being greater than the threshold, a notification may be displayed associated with an integrity of the fuel tank.
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公开(公告)号：US10323586B1
公开(公告)日：2019-06-18
申请号：US15848204
申请日：2017-12-20
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
CPC classification number: F02D41/0027 , F02D35/023 , F02D41/222 , F02D41/26 , F02D2041/224
Abstract: A dual fuel engine control system includes a pressure sensor, and an electronic control unit coupled with the pressure sensor and structured to receive cylinder pressure data indicative of cylinder over-pressurization, and to switch the system to a limited gas-to-liquid substitution mode based on the cylinder pressure data indicative of cylinder over-pressurization. The electronic control unit is further structured to return the system to a normal gas-to-liquid substitution mode, receive cylinder pressure data indicative of cylinder over-pressurization after returning the system to the normal gas-to-liquid substitution mode, and responsively output a gas substitution fault signal.
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公开(公告)号：US11105278B2
公开(公告)日：2021-08-31
申请号：US15423905
申请日：2017-02-03
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
Abstract: An engine control system includes a dual fuel internal combustion engine, a fuel system including a liquid fuel source and a gaseous fuel source, and a controller. The engine control system further includes a liquid fuel control module and at least one gaseous fuel control module associated with a first and second subset of cylinders, each communicatively connected over a network. The controller has an operating mode and a cylinder deactivation mode. The controller in the operating mode is configured to instruct the liquid fuel control module and the at least one gaseous fuel control module to operate the plurality of cylinders in a dual fuel mode. The controller in the cylinder deactivation mode transitions the plurality of cylinders to a liquid-fuel only mode over a phase out period, deactivates the first subset of cylinders, and then transitions to the dual fuel mode in the second subset of cylinders.
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公开(公告)号：US20210239273A1
公开(公告)日：2021-08-05
申请号：US16777374
申请日：2020-01-30
Applicant: Caterpillar Inc.
Inventor： Brian M. Bevard , Derek Samsel , Manikandan Natarajan , Joshua Perko , Matthew Jordan Engfehr , Roderick S. Zehrung
Abstract: In accordance with one aspect of the present disclosure, a mobile machine includes a LNG fuel tank to provide natural gas to a natural gas engine, a pressure relief valve to relieve pressure to a relief vent line, and a liquid separation device. The liquid separation device includes a canister defining an interior space and having a top end and a bottom end, a LNG inlet configured to receive mixed phase fluid into the canister from the relief vent line, a separator disposed within the interior space and fluidly connected to the LNG inlet, the separator configured to direct condensed liquid to the bottom end and to pass vapor to the interior space, a vapor outlet disposed on the top end of the canister, and a liquid drain disposed on the bottom end of the canister.
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公开(公告)号：US10145319B1
公开(公告)日：2018-12-04
申请号：US15877822
申请日：2018-01-23
Applicant: Caterpillar Inc.
Inventor： Matthew Jordan Engfehr , Nathan Atterberry
Abstract: Operating a dual fuel engine system includes firing combustion cylinders on a liquid fuel or both the liquid fuel and a gaseous fuel, and selectively cutting out at least one of the combustion cylinders based on a cylinder pressure parameter. A subset of those combustion cylinders remaining active after cylinder cutout is fired at a gas-to-liquid substitution ratio based on a user-settable combustion optimization term. The optimization term can include an efficiency term, an emissions term, and/or a fuel cost term, each of which has a finite range of values including a diesel equivalency value.
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