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Range of engines using common rail fuel system with pump and rail assemblies having common components

A fuel system, rail technology, applied in charging systems, engine components, machines/engines, etc., to solve problems such as problems

Inactive Publication Date: 2012-11-14
CATERPILLAR INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this strategy can be particularly problematic when the range of potential engine applications is extremely wide

Method used

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  • Range of engines using common rail fuel system with pump and rail assemblies having common components
  • Range of engines using common rail fuel system with pump and rail assemblies having common components
  • Range of engines using common rail fuel system with pump and rail assemblies having common components

Examples

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Embodiment Construction

[0012] refer to figure 1 , showing different engine examples. All engines include a common rail fuel system with similar pump and rail components, but each engine has a different number of cylinders. Specifically, at the small end of the range are engines 10, each of which includes four cylinders, a common rail 12, and a fuel and pump assembly 13 with two pumping elements. Next is an engine 15 with five cylinders 16 receiving fuel from a common rail 17 fluidly connected to a pump and rail assembly 18 also comprising two pumping elements. Next is the engine 20 with six cylinders 21 and a common rail 22 receiving pressurized fuel from a pump and rail assembly 23 comprising three pumping elements. The next engine is an engine 25 in V8 configuration with four cylinders 26 and a bank connected to a first common rail 29 and a second group of four cylinders 27 connected to a second common rail 28 . The first common rail 29 and the second common rail 28 are fluidly connected to a p...

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PUM

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Abstract

A pump and rail assembly (54) includes a plurality of quills (84) that are compressed between quill seats (108, 109) on a pump (75) and an output rail (76). A rail pressure control valve (77) and a rail pressure sensor (79) are attached to respective ends of the output rail (76). An inlet throttle valve (95) is attached to a housing (100) of the pump and rail assembly (54). Depending upon the application, the output rail (76) may supply fuel to a first injection bank (70) that includes a plurality of fuel injectors (72) in a first common rail (49, 50), and a second fuel injection bank that includes a second common rail (52, 53) and a plurality of fuel injectors (72).; Different engines having different numbers of cylinders (11, 16, 21, 26, 27, 33, 35, 41, 43, 48, 51, 57, 60) may use similar pump and rail assemblies that each include a plurality of quills (84), a plurality of pumping elements (94) positioned in a pump housing (100) and an output rail (76). The quills (84) for each of the different engine applications are interchangeable but differ in number. In addition, the pumping elements (94) of each of the different engine applications are also interchangeable but differ in number.

Description

technical field [0001] The present invention relates generally to common rail fuel systems, and more particularly to pump and rail assemblies with interchangeable components for certain engines. Background technique [0002] Engine manufacturers are constantly looking for ways to reduce costs. One possible way to reduce costs could be to use common interchangeable components to generate economies of scale. However, this strategy can be particularly problematic when the range of potential engine applications is extremely wide. For example, the Caterpillar Corporation of Peoria Illinois manufactures a wide range of compression ignition engines from as little as a 4.4 liter four cylinder engine to a 106 liter 20 cylinder engine and larger. Although these engines differ from each other in size, shape, configuration and many components, they share certain common features. Among these common features are the use of the same type of distillate diesel fuel, and what is common to ...

Claims

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Application Information

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IPC IPC(8): F02M55/02F02M59/00F02M59/44F02M61/14
CPCF02M63/0285
Inventor Z·李S·F·谢弗
Owner CATERPILLAR INC
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