Control apparatus of an internal combustion engine
First Claim
1. A control apparatus of an internal combustion engine which has air-fuel ratio control means for controlling the operation of an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture to be supplied to the engine, and ignition timing control means for controlling the operation of an ignition device for igniting the air-fuel mixture supplied to the engine, comprising:
- knock detecting means for detecting a knocking state of the engine, said knock detecting means delivering a knock signal corresponding to the detected knocking state when the knocking state is detected thereby; and
correction data calculating means for calculating a value of first correction data tending to change to a high degree, thereby preventing said knocking state, and a value of second correction data tending to change to a low degree, thereby preventing said knocking state, in response to said knock signal delivered from said knock detecting means;
the value of said first correction data being calculated so as to change in a first direction when said knock signal is delivered, and to change in a second direction opposite to said first direction when said knock signal is not delivered;
the value of said second correction data being calculated so as to change in a third direction when the value of said first correction data changes in said first direction to get beyond a preset value or range, and to change in a fourth direction opposite to said third direction when the value of said first correction data changes in said second direction;
said ignition timing control means including means for setting the ignition timing on the delay side when the value of said first correction data changes in said first direction, for setting the ignition timing on the advance side when the value of said first correction data changes in said second direction, for setting the ignition timing on the delay side when the value of said second correction data changes in said third direction, and for setting the ignition timing on the advance side when the value of said second correction data changes in said fourth direction; and
said air-fuel ratio control means including means for adjusting the air-fuel ratio to a value on the fuel-rich side when the value of said first correction data changes in said first direction, and for adjusting the air-fuel ratio to a value on the fuel-lean side when the value of said first correction data changes in said second direction.
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Accused Products
Abstract
A control apparatus of an internal combustion engine which has an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture, and an ignition device for igniting the air-fuel mixture. When a knock sensor detects a knocking state of the engine, it delivers a knock signal corresponding to the detected knocking state. In response to the knock signal delivered from the knock sensor, first correction data, which instantaneously prevents the knocking state by changing to a high degree, and second correction data, which corresponds to the properties of fuel used and prevents the knocking state by changing to a low degree, are calculated. The ignition timing is set in accordance with the calculated first and second correction data, whereby the operation of the ignition device is controlled. The air-fuel ratio is set in accordance with at least one of the first and second correction data, whereby the operation of the air-fuel ratio adjusting device is controlled.
22 Citations
21 Claims
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1. A control apparatus of an internal combustion engine which has air-fuel ratio control means for controlling the operation of an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture to be supplied to the engine, and ignition timing control means for controlling the operation of an ignition device for igniting the air-fuel mixture supplied to the engine, comprising:
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knock detecting means for detecting a knocking state of the engine, said knock detecting means delivering a knock signal corresponding to the detected knocking state when the knocking state is detected thereby; and correction data calculating means for calculating a value of first correction data tending to change to a high degree, thereby preventing said knocking state, and a value of second correction data tending to change to a low degree, thereby preventing said knocking state, in response to said knock signal delivered from said knock detecting means; the value of said first correction data being calculated so as to change in a first direction when said knock signal is delivered, and to change in a second direction opposite to said first direction when said knock signal is not delivered; the value of said second correction data being calculated so as to change in a third direction when the value of said first correction data changes in said first direction to get beyond a preset value or range, and to change in a fourth direction opposite to said third direction when the value of said first correction data changes in said second direction; said ignition timing control means including means for setting the ignition timing on the delay side when the value of said first correction data changes in said first direction, for setting the ignition timing on the advance side when the value of said first correction data changes in said second direction, for setting the ignition timing on the delay side when the value of said second correction data changes in said third direction, and for setting the ignition timing on the advance side when the value of said second correction data changes in said fourth direction; and said air-fuel ratio control means including means for adjusting the air-fuel ratio to a value on the fuel-rich side when the value of said first correction data changes in said first direction, and for adjusting the air-fuel ratio to a value on the fuel-lean side when the value of said first correction data changes in said second direction. - View Dependent Claims (2, 3, 4, 5)
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6. A control apparatus of an internal combustion engine which has air-fuel ratio control means for controlling the operation of an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture to be supplied to the engine, and ignition timing control means for controlling the operation of an ignition device for igniting the air-fuel mixture supplied to the engine, comprising:
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knock detecting means for detecting a knocking state of the engine, said knock detecting means delivering a knock signal corresponding to the detected knocking state when the knocking state is detected thereby; and correction data calculating means for calculating a value of first correction data tending to change to a high degree, thereby preventing said knocking state, and a value of second correction data tending to change to a low degree, thereby preventing said knocking state, in response to said knock signal delivered from said knock detecting means; the value of said first correction data being calculated so as to change in a first direction when said knock signal is delivered, and to change in a second direction opposite to said first direction when said knock signal is not delivered; the value of said second correction data being calculated so as to change in a third direction when the value of said first correction data changes in said first direction to get beyond a preset value or range, and to change in a fourth direction opposite to said third direction when the value of said first correction data changes in said second direction; said ignition timing control means including means for setting the ignition timing on the delay side when the value of said first correction data changes in said first direction, for setting the ignition timing on the advance side when the value of said first correction data changes in said second direction, for setting the ignition timing on the delay side when the value of said second correction data changes in said third direction, and for setting the ignition timing on the advance side when the value of said second correction data changes in said fourth direction; and said air-fuel ratio control means including means for adjusting the air-fuel ratio to a value on the fuel-rich side when the value of said second correction data changes in said third direction, and for adjusting the air-fuel ratio to a value on the fuel-lean side when the value of said second correction data changes in said fourth direction. - View Dependent Claims (7, 8, 9)
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10. A control apparatus of an internal combustion engine which has air-fuel ratio control means for controlling the operation of an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture to be supplied to the engine, and ignition timing control means for controlling the operation of an ignition device for igniting the air-fuel mixture supplied to the engine, comprising:
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knock detecting means for detecting a knocking state of the engine, said knock detecting means delivering a knock signal corresponding to the detected knocking state when the knocking state is detected thereby; and correction data calculating means for calculating a value of first correction data tending to change to a high degree, thereby preventing said knocking state, and a value of second correction data tending to change to a low degree, thereby preventing said knocking state, in response to said knock signal delivered from said knock detecting means; the value of said first correction data being calculated so as to change in a first direction when said knock signal is delivered, and to change in a second direction opposite to said first direction when said knock signal is not delivered; the value of said second correction data being calculated so as to change in a third direction when the value of said first correction data changes in said first direction to get beyond a preset value or range, and to change in a fourth direction opposite to said third direction when the value of said first correction data changes in said second direction; said ignition timing control means including means for setting the ignition timing on the delay side when the value of said first correction data changes in said first direction, for setting the ignition timing on the advance side when the value of said first correction data changes in said second direction, for setting the ignition timing on the delay side when the value of said second correction data changes in said third direction, and for setting the ignition timing on the advance side when the value of said second correction data changes in said fourth direction; and said air-fuel ratio control means including means for adjusting the air-fuel ratio to a value on the fuel-rich side when the value of said first correction data changes in said first direction, for adjusting the air-fuel ratio to a value on the fuel-lean side when the value of said first correction data changes in said second direction, for adjusting the air-fuel ratio to a value on the fuel-rich side when the value of said second correction data changes in said third direction, and for adjusting the air-fuel ratio to a value on the fuel-lean side when the value of said second correction data changes in said fourth direction. - View Dependent Claims (11, 12, 13, 14)
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15. A control apparatus of an internal combustion engine which has air-fuel ratio control means for controlling the operation of an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture to be supplied to the engine, and ignition timing control means for controlling the operation of an ignition device for igniting the air-fuel mixture supplied to the engine, comprising:
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knock detecting means for detecting a knocking state of the engine, said knock detecting means delivering a knock signal corresponding to the detected knocking state when the knocking state is detected thereby; and correction data calculating means for calculating a value of first correction data tending to change to a high degree, thereby preventing said knocking state, and a value of second correction data tending to change to a low degree, thereby preventing said knocking state, in response to said knock signal delivered from said knock detecting means; the value of said first correction data being calculated so as to change in a first direction when said knock signal is delivered, and to change in a second direction opposite to said first direction when said knock signal is not delivered; the value of said second correction data being calculated so as to change in a third direction when the value of said first correction data changes in said first direction to get beyond a preset value or range, and to change in a fourth direction opposite to said third direction when the value of said first correction data changes in said second direction to get beyond said preset range, said second correction data being maintained without being changed when said first correction data takes a value within said preset range; said ignition timing control means including means for setting the ignition timing in accordance with said first and second correction data calculated by said correction data calculating means, and for controlling the operation of said ignition device on the basis of said set ignition timing; and said air-fuel ratio control means including means for setting the air-fuel ratio in accordance with at least one of said first and second correction data calculated by said correction data calculating means, and for controlling the operation of said air-fuel ratio adjusting device on the basis of said set air-fuel ratio. - View Dependent Claims (16, 17)
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18. A control apparatus of an internal combustion engine which has air-fuel ratio control means for controlling the operation of an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture to be supplied to the engine, and ignition timing control means for controlling the operation of an ignition device for igniting the air-fuel mixture supplied to the engine, comprising:
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knock detecting means for detecting a knocking state of the engine, said knock detecting means delivering a knock signal corresponding to the detected knocking state when the knocking state is detected thereby; and correction data calculating means for calculating a value of first correction data tending to change to a high degree, thereby preventing said knocking state, and a value of second correction data tending to change to a low degree, thereby preventing said knocking state, in response to said knock signal delivered from said knock detecting means; the value of said first correction data being calculated so as to change in a first direction when said knock signal is delivered, and to change in a second direction opposite to said first direction when said knock signal is not delivered; the value of said second correction data being calculated so as to change in a third direction when the value of said first correction data changes in said first direction to get beyond a preset value or range, and to change in a fourth direction opposite to said third direction when the value of said first correction data changes in said second direction to get beyond said preset value or range, the change of said second correction data in said third and fourth directions being different in degree; said ignition timing control means including means for setting the ignition timing in accordance with said first and second correction data calculated by said correction data calculating means, and for controlling the operation of said ignition device on the basis of said set ignition timing; and said air-fuel ratio control means including means for setting the air-fuel ratio in accordance with at least one of said first and second correction data calculated by said correction data calculating means, for controlling the operation of said air-fuel ratio adjusting device on the basis of said set air-fuel ratio. - View Dependent Claims (19, 20, 21)
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Specification