US4428344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine knock anticipation
Assignee: Ford Motor Co
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Filing: 1982-01-08
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Granted: 1984-01-31
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Expires: 2002-01-08
Abstract
Abstract An engine operating parameter which anticipates knock, such as throttle angle position, is used in combination with a knock sensor to generate a control signal to retard engine spark. For example, the relatively slow response of a low noise sensed knock signal can be compensated by a relatively fast response signal indicating change in the throttle angle position. Thus earlier and improved control of knock can be achieved.
Inventors
- 👤 Louis R. Focht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:59
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/152; F02P5/1523; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
A knock control system for providing a signal suitable for controlling ignition of a vehicle mounted internal combustion engine so as to eliminate knock includes: a knock sensor means for generating a signal indicating the occurrence of a knock vibration; an engine operating parameter sensing means for detecting the occurrence of an engine operating parameter related to the occurrence of knock; said engine operating parameter sensing means including: a throttle angle position sensor means; an envelope detection circuit coupled to receive a signal from said knock sensor; a low pass filter coupled to receive a signal from said envelope detection circuit; a high pass filter coupled to said throttle angle position sensor means for processing an output signal from said throttle angle position sensor means; a summer coupled to receive signals from both said high pass filter and said low pass filter for processing said signals for knock control; a proportional retard ignition module for receiving said knock control signal to retard the spark timing thereby avoiding knock; and wherein said knock sensor is an acceleration sensor and said throttle angle position sensor is a resistive slider type sensor.
Claim 2
Dependent Claim
189 words
A knock control system for providing a signal suitable for controlling ignition of a vehicle mounted internal combustion engine so as to eliminate knock includes: a knock sensor means for generating a signal indicating the occurrence of a knock vibration; an engine operating parameter sensing means for detecting the occurrence of an engine operating parameter related to the occurrence of knock; said engine operating parameter sensing means including: a throttle angle position sensor means; an envelope detection circuit coupled to receive a signal from said knock sensor; a low pass filter coupled to receive a signal from said envelope detection circuit; a high pass filter coupled to said throttle angle position sensor means for processing an output signal from said throttle angle position sensor means; a summer coupled to receive signals from both said high pass filter and said low pass filter for processing said signals for knock control; a proportional retard ignition module for receiving said knock control signal to retard the spark timing thereby avoiding knock; and wherein said knock sensor is an acceleration sensor and said throttle angle position sensor is a resistive slider type sensor.
Claim 3
Independent Claim
113 words
A method for controlling ignition of a vehicle mounted internal combustion engine including: generating a signal indicating occurrence of knock; detecting the occurrence of an engine operating parameter related to the occurrence of knock by sensing the throttle position angle; generating an envelope detection signal in response to a signal indicating the occurrence of a knock vibration; passing through a low pass filter the envelope detection signal; passing through a high pass filter the signal indicating throttle angle position; and summing the signals from the high pass filter and low pass filter for producing a combined knock control signal thereby providing a signal suitable for retarding engine spark advance in anticipation of spark.
Claim 4
Independent Claim
113 words
A method for controlling ignition of a vehicle mounted internal combustion engine including: generating a signal indicating occurrence of knock; detecting the occurrence of an engine operating parameter related to the occurrence of knock by sensing the throttle position angle; generating an envelope detection signal in response to a signal indicating the occurrence of a knock vibration; passing through a low pass filter the envelope detection signal; passing through a high pass filter the signal indicating throttle angle position; and summing the signals from the high pass filter and low pass filter for producing a combined knock control signal thereby providing a signal suitable for retarding engine spark advance in anticipation of spark.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |