Anti-knocking device an method

• US 6,832,598 B2
• Filed: 05/23/2003
• Issued: 12/21/2004
• Est. Priority Date: 10/12/2000
• Status: Active Grant

• Current Assignee: Yamaha Motor Electronics Company Limited (Yamaha Corporation)
• Original Assignee: Kabushiki Kaisha Moric
• Inventors: Nagatsu, Yoshiyuki, Isoda, Naoya
• Primary Examiner(s): WOLFE JR, WILLIS RAY
• Application Number:
  US10/249,985
• Publication Number:
  US 20030168046A1
• Time in Patent Office: 578 Days
• Field of Search: 123/406.23, 123/406.24, 123/406.29, 123/435, 123/436, 123/612, 123/617, 123/FOR.109, 123/FOR.114, 701/110, 701/111
• US Class Current: 123/406.24
• CPC Class Codes: F02B 2075/025 two
• CPC Class Codes: F02D 2200/1015 Engines misfires
• CPC Class Codes: F02D 35/027 using knock sensors
• CPC Class Codes: F02D 41/045 Detection of accelerating or decelerating state detection thereof in general G01P
• CPC Class Codes: F02D 41/1498 measuring engine roughness
• CPC Class Codes: F02P 5/1504 with particular means during a transient phase, e.g. acceleration, deceleration, gear change during starting F02P5/1506
• CPC Class Codes: F02P 5/152 dependent on pinking detecting or indicating knocks in internal-combustion engines G01L23/22
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A method and apparatus that permit anti-knock control without the use of separate knock detectors as well as controlling the basic ignition timing from the output of a single engine speed sensor.

Claims

1. An internal combustion engine and control system therefore, said engine comprising a driven shaft, a sensor arrangement associated with said driven shaft for sensing the rotational speed of the driven shaft during the rotation of the driven shaft, an ignition system for firing said engine, said engine speed sensor determining a change in the load on said engine and if said engine load change is greater than a predetermined amount indicative of an incipient knocking condition said ignition timing control is altered to retard the timing and preclude knocking.

2. An internal combustion engine and control system therefore as set forth in claim 1, wherein the engine load is also utilized to set the basic ignition timing in addition to the retardation to avoid knocking.

3. An internal combustion engine and control system therefore as set forth in claim 1, wherein said engine speed sensor senses the instantaneous rotational speed of the driven shaft during the rotation of said driven shaft for less than a complete rotation and senses the rotational speed of said driven shaft for a complete revolution thereof including the measured less than complete rotation, and determines the engine load from these measurements.

4. An internal combustion engine and control system therefore as set forth in claim 3, wherein the engine load is determined by the change in engine speed during successive intervals.

5. An internal combustion engine and ignition control system therefore, said engine comprising a driven shaft, a sensor arrangement associated with said driven shaft for sensing the rotational speed of the driven shaft during the rotation of the driven shaft, an ignition system for firing said engine, said engine speed sensor determining the load on said engine for providing a signal to said ignition system for determining the timing of firing said ignition system in response to engine load, said engine speed sensor further providing a signal if the engine load change is greater than a predetermined amount indicative of an incipient knocking condition for altering said ignition timing control to retard the timing and preclude knocking.

6. A method of controlling an internal combustion comprising a driven shaft, a sensor arrangement associated with the driven shaft for sensing the rotational speed of the driven shaft during the rotation of the driven shaft, and an ignition system for firing the engine, said method comprising determining a change in the load on said engine from the output of the engine speed sensor and if said engine load change is greater than a predetermined amount indicative of an incipient knocking condition retard the ignition timing and preclude knocking.

7. A method of operating an internal combustion engine as set forth in claim 6, wherein said engine speed sensor senses the instantaneous rotational speed of the driven shaft during the rotation of said driven shaft for less than a complete rotation and senses the rotational speed of said driven shaft for a complete revolution thereof including the measured less than complete rotation, and the engine load is determined from these measurements.

8. A method of operating an internal combustion engine as set forth in claim 7, wherein the engine load is determined by the change in engine speed during successive intervals.

9. A method of operating an internal combustion engine as set forth in claim 6, wherein the engine load is also utilized to set the basic ignition timing in addition to the retardation to avoid knocking.

10. A method of operating an internal combustion engine comprising a driven shaft, a sensor arrangement associated with said driven shaft for sensing the rotational speed of the driven shaft during the rotation of the driven shaft, an ignition system for firing said engine, said method comprising the steps of utilizing the engine speed sensor for determining the load on the engine for providing a signal to the ignition system for determining the timing of firing the ignition system in response to engine load, and also employing the engine speed sensor to providing a signal if the engine load change is greater than a predetermined amount indicative of an incipient knocking condition for altering said ignition timing control to retard the timing and preclude knocking.