Method and apparatus for controlling fuel injection into an engine
First Claim
1. Method for controlling fuel injection into a direct injection, compression-ignition engine, comprising:
- determining an engine operating point;
determining a quantity of fuel to inject during a combustion cycle; and
, selectively executing one of one, two, and three fuel injection events during the combustion cycle based upon the engine operating point and the quantity of fuel to inject.
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Accused Products
Abstract
A method for controlling fuel injection into a direct injection, compression-ignition internal combustion engine is provided. The engine preferably comprises a diffusion-combustion engine equipped with a fuel-injection system comprising a high-pressure fuel system and a plurality of fuel injectors each adapted to inject fuel directly into a combustion chamber of the engine and a controller. The controller is adapted to monitor engine operation and an operator torque request, and determine a quantity of fuel to inject into one of the combustion chambers during a combustion cycle. Each fuel injector is actuated to selectively execute one of one, two, and three fuel injection events to deliver the determined quantity of fuel to the combustion chamber during the combustion cycle.
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Citations
19 Claims
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1. Method for controlling fuel injection into a direct injection, compression-ignition engine, comprising:
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determining an engine operating point;
determining a quantity of fuel to inject during a combustion cycle; and
,selectively executing one of one, two, and three fuel injection events during the combustion cycle based upon the engine operating point and the quantity of fuel to inject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Method for optimizing operation of a direct injection, compression-ignition engine, comprising:
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determining an engine operating point;
determining a quantity of fuel to inject during a combustion cycle; and
,selectively executing one of one, two, and three fuel injection events during the combustion cycle based upon engine combustion efficiency and exhaust emissions. - View Dependent Claims (13)
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14. Internal combustion engine, comprising:
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a diffusion-combustion engine equipped with a fuel-injection system comprising a high-pressure fuel system and a plurality of fuel injectors each adapted to inject fuel directly into a combustion chamber of the engine; and
,a controller, adapted to;
monitor engine operation and an operator torque request;
determine a quantity of fuel to inject into one of the combustion chambers during a combustion cycle;
actuate one of the fuel injectors to selectively execute one of one, two, and three fuel injection events to deliver the determined quantity of fuel to the combustion chamber during the combustion cycle; and
,initiate a start of injection of the first fuel injection event effective to minimize particulate mass emissions and optimize engine thermal efficiency. - View Dependent Claims (15, 16, 17, 18)
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19. System to control exhaust gas emissions in a direct-injection, diesel-cycle, internal combustion engine, comprising:
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i) a compression-ignition engine, comprising;
a) a plurality of cylinders, each cylinder having a combustion chamber formed therewithin;
b) a fuel injection system, comprising a plurality of fuel injectors fluidly connected to a pressurized fuel line;
each injector having a plurality of fuel-distributive nozzles having a low flow number, each injector operable to receive pressurized fuel from the fuel rail, and, operable to directly inject a quantifiable mass of fuel into a combustion chamber of the engine; and
,ii) a control system;
operable to;
monitor engine operation, and, control the fuel injection system;
the control system having a computer program encoded therein for effecting a method to control operation of the fuel injection system, the method comprising;
injecting a first mass of fuel immediately prior to the piston reaching a top-dead center location in the combustion chamber during a compression stroke; and
,injecting a second mass of fuel substantially equal to the first mass of fuel into the combustion chamber during an expansion stroke occurring immediately thereafter, after a predetermined dwell period.
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Specification