Knocking determination apparatus for internal combustion engine
First Claim
1. An apparatus for determining whether or not knocking has occurred in an internal combustion engine, the internal combustion engine including a first injector for directly injecting fuel into a combustion chamber, a second injector for injecting fuel into an intake system, and a knock sensor for detecting information relating to knocking and generating an output signal, the apparatus comprising:
- a knocking determination means for determining whether or not knocking has occurred based on the output signal of the knock sensor during a knock determination period; and
an altering means for altering the knock determination period in accordance with a ratio between the amount of fuel the first injector injects and the amount of fuel the second injector injects.
1 Assignment
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Accused Products
Abstract
An electronic control for determining knocking in an internal combustion engine having an intake injector for injecting fuel into an air intake port and an in-cylinder injector for directly injecting fuel into a combustion chamber. Knocking is determined based on an output signal from a knock sensor during a knock determination period. The electronic control unit alters the knock determination period in accordance with the ratio of the amount of fuel injected by the two injectors.
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Citations
26 Claims
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1. An apparatus for determining whether or not knocking has occurred in an internal combustion engine, the internal combustion engine including a first injector for directly injecting fuel into a combustion chamber, a second injector for injecting fuel into an intake system, and a knock sensor for detecting information relating to knocking and generating an output signal, the apparatus comprising:
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a knocking determination means for determining whether or not knocking has occurred based on the output signal of the knock sensor during a knock determination period; and
an altering means for altering the knock determination period in accordance with a ratio between the amount of fuel the first injector injects and the amount of fuel the second injector injects. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for determining whether or not knocking has occurred in an internal combustion engine, the internal combustion engine including a first injector for directly injecting fuel into a combustion chamber, a second injector for injecting fuel into an intake system, and a knock sensor for detecting information relating to knocking and generating an output signal, the apparatus comprising:
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a knocking determination means for comparing the output signal of the knock sensor with a knock determination level to determine whether or not knocking has occurred; and
a changing means for changing the knock determination level in accordance with a ratio between the amount of fuel the first injector injects and the amount of fuel the second injector injects. - View Dependent Claims (8, 9)
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10. An apparatus for determining whether or not knocking has occurred in an internal combustion engine, the internal combustion engine including a first injector for directly injecting fuel into a combustion chamber, a second injector for injecting fuel into an intake system, and a knock sensor for detecting information relating to knocking and generating an output signal, the apparatus comprising:
a controller for determining whether or not knocking has occurred based on the output signal of the knock sensor during a knock determination period and for altering the knock determination period in accordance with a ratio between the amount of fuel the first injector injects and the amount of fuel the second injector injects. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus for determining whether or not knocking has occurred in an internal combustion engine, the internal combustion engine including a first injector for directly injecting fuel into a combustion chamber, a second injector for injecting fuel into an intake system, and a knock sensor for detecting information relating to knocking and generating an output signal, the apparatus comprising:
a controller for comparing the output signal of the knock sensor with a knock determination level to determine whether or not knocking has occurred and for changing the knock determination level in accordance with a ratio between the amount of fuel the first injector injects and the amount of fuel the second injector injects. - View Dependent Claims (17, 18)
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19. A method for preventing knocking in an internal combustion engine, the internal combustion engine including a first injector for directly injecting fuel into a combustion chamber, a second injector for injecting fuel into an intake system, and a spark plug, the method comprising:
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measuring vibration of the internal combustion engine to generate a detection signal representing the vibration;
adjusting a knock determination period in accordance with a ratio between the amount of fuel the first injector injects and the amount of fuel the second injector injects;
adjusting a knock determination level in accordance with said ratio;
sensing knocking in the internal combustion engine using a knock sensor that generates an output signal representative of knocking;
comparing the output signal of the knock sensor during the knock determination period that has been adjusted with the knock determination level that has been adjusted to determine whether or not knocking has occurred; and
adjusting the timing for spark plug ignition when knocking has occurred. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification