公开(公告)号：US08936009B2

公开(公告)日：2015-01-20

申请号：US13665534

申请日：2012-10-31

Applicant: Caterpillar Inc.

Inventor： Daniel R. Puckett ,  Joshua W. Steffen ,  Frank J. Lombardi ,  Steven T. Grant

IPC: F02M21/02

CPC classification number: F02D19/10 ,  F02D19/0673 ,  Y02T10/36 ,  Y10T137/0379 ,  Y10T137/7782 ,  Y10T137/7793

Abstract: A pressure regulator is disclosed having a body, a valve seat dividing a cavity of the body into first and second portions, and an end stop movable against a bias to selectively engage the valve seat and isolate the first and second portions. The pressure regulator may also have a first inlet port in the first portion, a first outlet port in the second portion and in fluid communication with the first portion via the valve seat, and a second inlet port in the second portion. The fuel system may also have a valve element in the second portion and movable against a spring bias based on a pressure difference between an open position and a restricted position against the end stop. The fuel system may additionally have an actuator biased to urge the valve element toward the second position and selectively actuated to move away from the valve element.

Abstract translation: 公开了一种压力调节器，其具有主体，阀体将主体的空腔分成第一和第二部分，以及端部止动件，其可抵抗偏压移动，以选择性地接合阀座并隔离第一和第二部分。 压力调节器还可以具有第一部分中的第一入口端口，第二部分中的第一出口端口，并且经由阀座部与第一部分流体连通，以及第二部分中的第二入口端口。 燃料系统还可以在第二部分中具有阀元件，并且可基于相对于端部止挡件的打开位置和限制位置之间的压力差抵抗弹簧偏压运动。 燃料系统可以另外具有偏压的致动器，以将阀元件推向第二位置并且被选择性地致动以远离阀元件移动。

公开(公告)号：US20140130778A1

公开(公告)日：2014-05-15

申请号：US14159831

申请日：2014-01-21

Applicant: Caterpillar Inc.

Inventor： Daniel R. Puckett ,  Steven T. Grant ,  Joshua W. Steffen ,  Benjamin A. Nash

IPC: F02M39/00

CPC classification number: F02M43/00 ,  F02D19/022 ,  F02D19/0647 ,  F02D41/0025 ,  F02D2200/06 ,  F02D2250/18 ,  F02M21/0215 ,  F02M21/0221 ,  F02M21/0245 ,  F02M21/06 ,  Y02T10/32 ,  Y02T10/36

Abstract: A method of operating an engine is disclosed. The method includes estimating an operational status of a cryogenic pump selectively driven by the engine. The cryogenic pump is configured to pressurize a liquefied gaseous fuel. The method also includes estimating a power requirement of the cryogenic pump. The method further includes determining whether the engine is operating on a lug curve. Moreover, the method includes providing additional fuel to the engine in order to increase an engine power beyond the lug curve prior to an operation of the cryogenic pump. The increase in engine power is at least equal to the power requirement of the cryogenic pump.

Abstract translation: 公开了一种操作发动机的方法。 该方法包括估计由发动机选择性驱动的低温泵的操作状态。 低温泵构造成对液化的气态燃料加压。 该方法还包括估计低温泵的功率需求。 该方法还包括确定发动机是否在凸耳曲线上操作。 此外，该方法包括向发动机提供额外的燃料，以便在低温泵的操作之前增加引擎功率超过凸耳曲线。 发动机功率的增加至少等于低温泵的功率要求。