Fuel injection timing control system for direct injection type internal combustion engine and method for the same
First Claim
1. A fuel injection timing control system for a direct injection type internal combustion engine, which is capable of switching a fuel injection mode between a compression stroke injection mode for injecting fuel mainly during a compression stroke and an intake stroke injection mode for injecting fuel mainly during an intake stroke, comprising:
- a correcting unit that corrects a fuel injection timing in said intake stroke according to parameters representing a tendency of fuel to adhere to an inside of said internal combustion engine, wherein when it is impossible to inject fuel of a fuel injection volume required in said intake stroke injection mode in the fuel injection timing corrected by said correcting unit, said correcting unit sets a timing for injecting remaining fuel during a compression stroke following said intake stroke in one combustion cycle to satisfy said required fuel injection volume; and
a control unit that controls injection of fuel into said internal combustion engine according to the fuel injection timing corrected by said correcting unit, wherein said correcting unit detects a temperature relating to said internal combustion engine as a parameter representing the tendency of the fuel to adhere to the inside of said internal combustion engine, and corrects the fuel injection starting timing in said intake stroke to retard side as the detected temperature becomes lower.
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Abstract
In a direct injection type engine, capable of switching an injection mode between a compression stroke injection mode for injecting fuel mainly during a compression stroke and an intake stroke injection mode for injecting fuel mainly during an intake stroke; a fuel injection starting timing in the intake stroke is corrected to a retard side as the temperature relating to an internal combustion engine, detected as a parameter representing the tendency of fuel to adhere to the inside of the internal combustion engine, becomes lower. If a required fuel injection volume cannot be injected during the intake stroke injection mode in the corrected fuel injection timing, a timing for injecting remaining fuel to satisfy the required fuel injection volume during a compression stroke following the intake stroke in one combustion cycle is determined. The injection of the fuel is controlled according to the corrected fuel injection timing.
8 Citations
16 Claims
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1. A fuel injection timing control system for a direct injection type internal combustion engine, which is capable of switching a fuel injection mode between a compression stroke injection mode for injecting fuel mainly during a compression stroke and an intake stroke injection mode for injecting fuel mainly during an intake stroke, comprising:
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a correcting unit that corrects a fuel injection timing in said intake stroke according to parameters representing a tendency of fuel to adhere to an inside of said internal combustion engine, wherein when it is impossible to inject fuel of a fuel injection volume required in said intake stroke injection mode in the fuel injection timing corrected by said correcting unit, said correcting unit sets a timing for injecting remaining fuel during a compression stroke following said intake stroke in one combustion cycle to satisfy said required fuel injection volume; and
a control unit that controls injection of fuel into said internal combustion engine according to the fuel injection timing corrected by said correcting unit, wherein said correcting unit detects a temperature relating to said internal combustion engine as a parameter representing the tendency of the fuel to adhere to the inside of said internal combustion engine, and corrects the fuel injection starting timing in said intake stroke to retard side as the detected temperature becomes lower. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fuel injection timing controlling method for a direct injection type internal combustion engine, which is capable of switching a fuel injection mode between a compression stroke injection mode for injecting fuel mainly during a compression stroke and an intake stroke injection mode for injecting fuel mainly during an intake stroke, comprising:
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detecting a temperature relating to said internal combustion engine as a parameter representing a tendency of fuel to adhere to an inside of said internal combustion engine;
correcting a fuel injection timing in said intake stroke to retard side as the detected temperature becomes lower;
setting a timing for injecting remaining fuel in a compression stroke following said intake stroke in one combustion cycle to satisfy said required fuel injection volume when it is impossible to inject fuel of a fuel injection volume required in said intake stroke injection mode in the corrected fuel injection timing;
controlling injection of fuel into said internal combustion engine according to the corrected fuel injection timing. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification