IGNITION CONTROLLER

• US 20030168047A1
• Filed: 05/23/2003
• Published: 09/11/2003
• Est. Priority Date: 10/12/2000
• Status: Active Grant

• Current Assignee: Yamaha Motor Electronics Company Limited (Yamaha Corporation)
• Original Assignee: Kabushiki Kaisha Moric
• Inventors: Isoda, Naoya, Nagatsu, Yoshiyuki
• Granted Patent: US 6,892,702 B2
• Time in Patent Office: Days
• 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 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: Y02T 10/40 Engine management systems

Abstract

A number of embodiments of improved engine system control method and apparatus based on operator demand and rate of change in demand that reduce not only the number of components but also decrease the complexity of the electronic system without requiring a throttle position 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 engine control system for controlling a running condition of said engine, said engine speed sensor determining a basic condition of said engine and providing a control signal to said engine control system based on said sensed basic condition, a system for determining the degree of change in said basic condition during a cycle interval and if said degree of change in said basic condition is other than a predetermined amount said control signal to said engine control system is changed to compensate for the altered condition.

2. 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 basic condition from these measurements.

3. An internal combustion engine and control system therefore as set forth in claim 2, wherein the engine basic condition is determined by the change in engine speed during successive intervals.

4. An internal combustion engine and control system therefore as set forth in claim 1, wherein the engine system controlled is the ignition system.

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 engine control system for 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 for altering said engine control system.

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 engine control system for 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 for modifying the condition of the engine control system.

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 engine control system setting in addition to modifying the setting thereof.

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 engine control system for the 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 engine control system for determining the setting of the engine control 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 for altering the engine control system setting.