EP0084368A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Knock control apparatus and control method for internal combustion engines
Assignee: Hitachi Ltd
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Filing: 1983-01-17
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Granted: —
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Expires: 2003-01-17
Abstract
Abstract A knock control apparatus for internal combustion engines includes a plurality of sensors (4 - 8) for generating signals indicative of the operating conditions of an engine, a plurality of actuators (26, 28) responsive to control signals to control the respective energy conversion functions of the engine, a data processing unit (12) responsive to the signals from the sensors (4 - 8) to perform engine controlling data processing operations and thereby supply engine control values to the actuators (26, 28), and a knock sensing unit (2, 10) for detecting the occurrence of knocking in the engine and generating knock detection signals, and the data processing unit (12) is responsive to the knock detection signals from the knock sensing unit (2, 10) to retard the calculated ignition timing. When the acceleration of the engine is detected in accordance with the output signal of the sensor, the data processing unit increases, in accordance with the knock detection signals, an amount of ignition timing retard to be calculated over an amount of retard to be calculated in accordance with the knock detection signals during the steady operation of the engine.
Inventors
- 👤 Yasunori Mouri
- 👤 Noboru Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 21:22
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/152; F02P5/1523; F02P5/1521; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
201 words
In a knock control apparatus for internal combustion engines including sensor means (4 - 8) for generating signals indicative of operating conditions of an engine; actuator means (26, 28) responsive to control signals to control energy conversion functions of said engine; a data processing unit responsive to the signals from said sensor means (4 - 8) to perform engine controlling data processing operations and thereby supply engine control values to said actuator means (26, 28); and knock sensing means (2, 10) for detecting the occurrence of knocking in said engine and generating knock detection signals; said data processing unit being responsive to the knock detection signals from said knock sensing means (2, 10) to retard a calculated ignition timing, the improvement wherein said data processing unit (12) comprises: first means (90) for detecting an acceleration of said engine; and second means (96) responsive to the detection of said engine acceleration by said first means (90) to increase, in accordance with the knock detection signals from said sensing means (2, 10), an amount of ignition timing retard to be calculated over an amount of retard to be calculated in accordance with knock detection signals when said engine is at a steady operation.
Claim 2
Dependent Claim
201 words
In a knock control apparatus for internal combustion engines including sensor means (4 - 8) for generating signals indicative of operating conditions of an engine; actuator means (26, 28) responsive to control signals to control energy conversion functions of said engine; a data processing unit responsive to the signals from said sensor means (4 - 8) to perform engine controlling data processing operations and thereby supply engine control values to said actuator means (26, 28); and knock sensing means (2, 10) for detecting the occurrence of knocking in said engine and generating knock detection signals; said data processing unit being responsive to the knock detection signals from said knock sensing means (2, 10) to retard a calculated ignition timing, the improvement wherein said data processing unit (12) comprises: first means (90) for detecting an acceleration of said engine; and second means (96) responsive to the detection of said engine acceleration by said first means (90) to increase, in accordance with the knock detection signals from said sensing means (2, 10), an amount of ignition timing retard to be calculated over an amount of retard to be calculated in accordance with knock detection signals when said engine is at a steady operation.
Claim 3
Dependent Claim
34 words
An apparatus according to claim 1, wherein said second means (96) makes said amount of ignition retard for acceleration operation substantially two or more times larger than said amount of retard for normal operation.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 1, wherein said second means (96) maintains said amount of ignition timing retard constant irrespective of the number of knock detection signals within a predetermined rotation angle of said engine.
Claim 5
Dependent Claim
35 words
An apparatus according to claim 1, wherein said second means (96) controls said amount of ignition timing retard in accordance with the number of knock detection signals within a predetermined rotation angle of said engine.
Claim 6
Dependent Claim
53 words
An apparatus according to claim 1, wherein said sensor means (4 - 8) includes a sensor (6) for detecting an intake air quantity of said engine, and wherein said first means (90) determines said engine acceleration when a rate of change of said detected intake air quantity is greater than a predetermined value.
Claim 7
Dependent Claim
47 words
An apparatus according to claim 5, wherein when said engine acceleration is detected by said first means (90), said second means (96) increases said amount of ignition timing retard for acceleration operation over said amount of retard for a steady operation for a predetermined period of time.
Claim 8
Dependent Claim
184 words
In a knock control apparatus for internal combustion engines including sensor means (4 - 8) for generating signals indicative of operating conditions of an engine; actuator means (26, 28) responsive to control signals to control energy conversion functions of said engine; a data processing unit (12) responsive to the signals from said sensor means (4 - 8) to perform engine controlling data processing operatins and thereby supply engine control values to said actuator means (26, 28); and knock sensing means (2, 10) for detecting the occurrence of knocking in said engine and generating knock detection signals, said data processing unit (12) being responsive to the knock detection signals from said knock sensing means (2, 10) to retard a calculated ignition timing, a method of operating said knock control apparatus comprising the steps of: detecting an acceleration of said engine; and upon detection of said engine acceleration, increasing in accordance with said knock detection signals an amount of ignition timing retard to be calculated over an amount of retard to be calculated in accordance with knock detection signals during a steady operation of said engine.
Claim 9
Dependent Claim
184 words
In a knock control apparatus for internal combustion engines including sensor means (4 - 8) for generating signals indicative of operating conditions of an engine; actuator means (26, 28) responsive to control signals to control energy conversion functions of said engine; a data processing unit (12) responsive to the signals from said sensor means (4 - 8) to perform engine controlling data processing operatins and thereby supply engine control values to said actuator means (26, 28); and knock sensing means (2, 10) for detecting the occurrence of knocking in said engine and generating knock detection signals, said data processing unit (12) being responsive to the knock detection signals from said knock sensing means (2, 10) to retard a calculated ignition timing, a method of operating said knock control apparatus comprising the steps of: detecting an acceleration of said engine; and upon detection of said engine acceleration, increasing in accordance with said knock detection signals an amount of ignition timing retard to be calculated over an amount of retard to be calculated in accordance with knock detection signals during a steady operation of said engine.
Claim 10
Dependent Claim
35 words
A method according to claim 7, wherein said second step makes said amount of ignition timing retard for acceleration operation substantially two or more times larger than said amount of retard for a steady operation.
Claim 11
Dependent Claim
37 words
A method according to claim 7, wherein said second step maintains said amount of ignition timing retard for acceleration operation constant irrespective of the number of knock detection signals within a predetermined rotation angle of said engine.
Claim 12
Dependent Claim
37 words
A method according to claim 7, wherein said second step controls said amount of ignition timing retard for acceleration operation in accordance with the number of knock detection signals within a predetermined rotation angle of said engine.
Claim 13
Dependent Claim
52 words
A method according to claim 7, wherein said sensor means (4 - 8) includes a sensor (6) for detecting an intake air quantity of said engine, and wherein said first step determines said engine acceleration when a rate of change of said detected intake air quantity is greater than a predetermined value.
Claim 14
Dependent Claim
45 words
A method according to claim 7, wherein when said engine acceleration is detected by said first step, said second step increases said amount of ignition timing retard for acceleration operation over said amount of retard for a steady operation for a predetermined period of time.
References Cited (Backward Citations)
No citation records indexed.
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