CONTROL OF SPARK IGNITED INTERNAL COMBUSTION ENGINE
First Claim
1. A method of controlling a spark ignited internal combustion engine having a fuel injector which injects fuel directly into a combustion chamber, comprising:
- injecting a total amount of fuel into said combustion chamber during a cylinder cycle, said total amount of fuel injected by early in a compression stroke of said cylinder cycle at a first engine speed; and
injecting a first stage of fuel into said combustion chamber during a cylinder cycle, said first stage of fuel injected by early in a compression stroke of said cylinder cycle, and injecting a second stage of fuel, after injecting said first stage of fuel, said second stage of fuel injected by late in said compression stroke during said cylinder cycle at a second engine speed, said second engine speed less than said first engine speed, said first stage fuel and said second stage fuel injected at a desired engine torque that is greater than a threshold torque, and an amount of said second stage fuel being greater than an amount of said first stage fuel.
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Accused Products
Abstract
There is provided a method of controlling a spark ignited internal combustion engine having a fuel injector which injects fuel directly into its combustion chamber. The method comprises injecting a total amount of fuel into a combustion chamber by early in a compression stroke during a cylinder cycle at a first engine speed. The method further comprises injecting a first stage of fuel into the combustion chamber during a cylinder cycle by an early in a compression stroke of the cylinder cycle, and injecting a second stage of fuel by late in the compression stroke during the cylinder cycle at a second engine speed less than the first engine speed, after injecting the first stage of fuel. The amount of the second stage fuel is greater than an amount of said first stage fuel. Accordingly, the first and second stage fuels may not be pre-ignited before the spark ignition.
26 Citations
20 Claims
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1. A method of controlling a spark ignited internal combustion engine having a fuel injector which injects fuel directly into a combustion chamber, comprising:
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injecting a total amount of fuel into said combustion chamber during a cylinder cycle, said total amount of fuel injected by early in a compression stroke of said cylinder cycle at a first engine speed; and injecting a first stage of fuel into said combustion chamber during a cylinder cycle, said first stage of fuel injected by early in a compression stroke of said cylinder cycle, and injecting a second stage of fuel, after injecting said first stage of fuel, said second stage of fuel injected by late in said compression stroke during said cylinder cycle at a second engine speed, said second engine speed less than said first engine speed, said first stage fuel and said second stage fuel injected at a desired engine torque that is greater than a threshold torque, and an amount of said second stage fuel being greater than an amount of said first stage fuel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system comprising:
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a spark ignited internal combustion engine; a fuel injector which injects fuel directly into a combustion chamber; and a controller configured to control said fuel injector to; inject a total amount of fuel into said combustion chamber during a cylinder cycle, said total amount of fuel injected by an early in a compression stroke of said cylinder cycle at a first engine speed; and inject a first stage of fuel into said combustion chamber during a cylinder cycle, said first stage of fuel injected by early in a compression stroke of said cylinder cycle, and injecting a second stage of fuel, after injecting said first stage of fuel, said second stage of fuel injected by late in said compression stroke during said cylinder cycle at a second engine speed, said second engine speed less than said first engine speed, and said first stage fuel and said second stage fuel injected at a desired engine torque that is greater than a threshold torque, and an amount of said second stage fuel being greater than an amount of said first stage fuel. - View Dependent Claims (20)
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Specification