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System for controlling supply quantity of multiple fuel injection

A technology of fuel injection and control system, applied in fuel injection device, charging system, combustion engine, etc., can solve the problem of inconvenient control of this type

Active Publication Date: 2007-07-11
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The various fuel injection systems currently in use do not facilitate this type of control

Method used

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  • System for controlling supply quantity of multiple fuel injection
  • System for controlling supply quantity of multiple fuel injection
  • System for controlling supply quantity of multiple fuel injection

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Embodiment Construction

[0016] For purposes of this specification, an injection event is defined as each injection of fuel that occurs during a single cycle of the engine. For example, a cycle of a four-stroke engine includes the intake stroke of piston movement, the compression stroke, the expansion or power stroke, and the exhaust stroke. So, in a four-stroke engine, an injection event includes each fuel injection or shot that occurs during one cycle of motion of the piston through the four strokes. The term "fuel injection", as is customary in the art, may refer to the actual fuel injection or to the signal sent to a fuel injector or other fuel-actuated device representing the desired injection or delivery of fuel to the engine. Current command signal.

[0017] Referring to FIG. 1, an exemplary fuel injection system 12 of the present invention configured for a compression ignition engine 14 is shown. Fuel injection system 12 may include one or more hydraulically actuated, electronically controll...

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PUM

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Abstract

The invention discloses a fuel injection control system for engine, comprising fuel injection component, sensor and electric controller communicated with fuel injection component and sensor. The fuel injection component can carry at least one main oil injection and one subsequent oil injection. The sensor can take the pressure of fluid supplied to fuel injection component and generate the signal representing pressure. The electric controller is configured to receive the first input representing the object expected by operator, the second input representing the operation status and determine the total fuel of main and subsequent oil injections, duration of main oil injection, subsequent delay and duration of subsequent oil injection. The duration of subsequent oil injection is based on the total fuel of main and subsequent oil injections, duration of main oil injection, subsequent delay, sensor signal, the first input and the second input.

Description

technical field [0001] This invention relates generally to electronically controlled fuel injection systems, and more particularly to a method and system for accurately delivering multiple injections of fuel to cylinders of an internal combustion engine. Background technique [0002] Regulations concerning emissions in engine exhaust, including, for example, hydrocarbons, carbon monoxide, particulate matter and nitrogen oxides (NO x ) emission regulations are becoming more and more stringent. One method used by engine manufacturers to control exhaust emissions to comply with such emission standards is to strictly control the injection of fuel into each combustion chamber of the engine. For example, the number of fuel injections in a single cycle of the engine, the amount of fuel injected in an injection, the timing of each injection, and the fuel delivery rate for each injection can be varied to vary the emissions characteristics of the engine. [0003] One such injection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M51/00F02M47/02
CPCY02T10/44
Inventor B·G·麦吉
Owner CATERPILLAR INC