An engine ignition control device comprising: a start-up ignition controller having a function for preventing the occurrence of kickback by either delaying an ignition position of an engine or stopping ignition; start-up rotation angle detection means for detecting a rotation angle of a crankshaft o
An engine ignition control device comprising: a start-up ignition controller having a function for preventing the occurrence of kickback by either delaying an ignition position of an engine or stopping ignition; start-up rotation angle detection means for detecting a rotation angle of a crankshaft of the engine after initiation of a start-up operation of the engine; and switching means for switching control specifics of the start-up ignition controller in accordance with the detected start-up rotation angle so that when the detected start-up rotation angle is less than a set angle, there is created a kickback-preventive effect within a range at which engine startability is not compromised, and when the detected start-up rotation angle is equal to or greater than the set angle, there is created a kickback-preventive effect that is greater than the kickback-preventive effect for when the start-up rotation angle is equal to or less than the set angle.
대표청구항▼
1. An engine ignition control device for controlling ignition at start-up and during normal running of an engine started up using human power; the engine ignition control device comprising:a start-up ignition controller having a function for preventing the occurrence of kickback by either delaying a
1. An engine ignition control device for controlling ignition at start-up and during normal running of an engine started up using human power; the engine ignition control device comprising:a start-up ignition controller having a function for preventing the occurrence of kickback by either delaying an ignition position of the engine or stopping ignition when there is a risk of kickback occurring when the engine is started;start-up rotation angle detection means for detecting as a start-up rotation angle a rotation angle of a crankshaft of the engine after initiation of a start-up operation of the engine; andswitching means for switching control specifics of the start-up ignition controller in accordance with the detected start-up rotation angle so that when the start-up rotation angle detected by the start-up rotation angle detection means is less than a set angle, there is created a kickback-preventive effect within a range at which engine startability is not compromised, and when the detected start-up rotation angle is equal to or greater than the set angle, there is created a kickback-preventive effect that is greater than the kickback-preventive effect for when the start-up rotation angle is equal to or less than the set angle. 2. The engine ignition control device of claim 1, wherein the start-up ignition controller is configured so that the rotational speed of the engine is detected at a position immediately before a start-up regular ignition position which is set to a position angularly advanced relative to a crank angle position at which a piston of the engine reaches top dead center, the ignition position of the engine is the regular ignition position when the detected rotational speed is higher than a preset determination speed, and the ignition position of the engine is angularly delayed by an delaying angle amount that matches the detected rotational speed within a range that does not exceed a maximum delay angle position set to a position angularly delayed relative to the regular ignition position when the detected rotational speed is equal to or less than the determination speed; andthe switching means is configured so as to switch the determination speed in accordance with the detected start-up rotation angle such that when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is less than a set angle, there is created a kickback-preventive effect within a range at which engine startability is not compromised, and when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is equal to or greater than the set angle, there is created a kickback-preventive effect that is greater than the kickback-preventive effect for when the start-up rotation angle is less than the set angle. 3. The engine ignition control device of claim 1, wherein the start-up ignition controller is configured so that the rotational speed of the engine is detected at a position immediately before a start-up regular ignition position which is set to a position angularly advanced relative to a crank angle position at which a piston of the engine reaches top dead center, the ignition position of the engine is the regular ignition position when the detected rotational speed is higher than a preset determination speed, and the ignition position of the engine is angularly delayed by an delaying angle amount that matches the detected rotational speed within a range that does not exceed a maximum delay angle position set to a position angularly delayed relative to the regular ignition position when the detected rotational speed is equal to or less than the determination speed; andthe switching means is configured so as to switch the regular ignition position and the maximum delay angle position at the start-up in accordance with the detected start-up rotation angle such that when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is less than a set angle, there is created a kickback-preventive effect within a range at which engine startability is not compromised, and when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is equal to or greater than the set angle, there is created a kickback-preventive effect that is greater than the kickback-preventive effect for when the start-up rotation angle is less than the set angle. 4. The engine ignition control device of claim 2, comprising parameter detection means for detecting the time required for the crankshaft to rotate through a certain crank angle section immediately before the start-up regular ignition position as a rotational speed detection parameter including information of the rotational speed of the engine; wherein the start-up ignition controller is configured so as to determine that the rotational speed of the engine is equal to or less than the determination speed when the value of the parameter is equal to or greater than a preset determination value. 5. The engine ignition control device of claim 3, comprising parameter detection means for detecting the time required for the crankshaft to rotate through a certain crank angle section immediately before the start-up regular ignition position as a rotational speed detection parameter including information of the rotational speed of the engine; wherein the start-up ignition controller is configured so as to determine that the rotational speed of the engine is equal to or less than the determination speed when the value of the parameter is equal to or greater than a preset determination value. 6. The engine ignition control device of claim 2, wherein a crank angle sensor is provided for generating pulse signals at a plurality of pre-established rotation angle positions of the crankshaft of the engine;the start-up rotation angle detection means detects the start-up rotation angle from an output pulse of the crank angle sensor; andthe start-up ignition controller is configured so as to detect the regular ignition position and the maximum delay angle position from the output pulse of the crank angle sensor. 7. The engine ignition control device of claim 3, wherein there is provided a crank angle sensor for generating pulse signals at a plurality of pre-established rotation angle positions of the crankshaft of the engine;the start-up rotation angle detection means detects the start-up rotation angle from an output pulse of the crank angle sensor; andthe start-up ignition controller is configured so as to detect the regular ignition position and the maximum delay angle position from the output pulse of the crank angle sensor. 8. The engine ignition control device of claim 2, wherein there are provided an AC generator having a rotor attached to the crankshaft of the engine; and a waveform shaping circuit for converting an output of the AC generator to a phase signal indicating a level change at a zero-crossing point or a peak point; andthe start-up rotation angle detection means is configured so as to detect the rotation angle of the crankshaft from the phase signal. 9. The engine ignition control device of claim 3, wherein there is provided an AC generator having a rotor attached to the crankshaft of the engine, and a waveform shaping circuit for converting an output of the AC generator to a phase signal indicating a level change at a zero-crossing point or a peak point; andthe start-up rotation angle detection means is configured so as to detect the start-up rotation angle from the phase signal. 10. The engine ignition control device of claim 4, wherein there is provided a crank angle sensor for generating a first reference pulse at a first reference crank angle position set to a position angularly advanced relative to the crank angle position equivalent to top dead center of the piston of the engine, generating a second reference pulse at a second reference crank angle position set to a position delayed relative to the generated position of the first reference pulse and advanced relative to the crank angle position equivalent to top dead center of the piston of the engine, generating a third reference pulse at a third reference crank angle position delayed relative to the crank angle position equivalent to top dead center, and further generating a plurality of pulses in a section from the third reference crank angle position to the first reference crank angle position; andthe start-up ignition controller detects the position where the second reference pulse is generated and the position where the third reference pulse is generated by the crank angle sensor as the start-up regular ignition position and the maximum delay angle position respectively of the engine, and the parameter detection means detects the time required for the crankshaft to rotate from the first reference crank angle position to the second reference crank angle position as the rotational speed detection parameter. 11. The engine ignition control device of claim 5, wherein there is provided a crank angle sensor for generating a first reference pulse at a first reference crank angle position set to a position angularly advanced relative to the crank angle position equivalent to top dead center of the piston of the engine, generating a second reference pulse at a second reference crank angle position set to a position delayed relative to the generated position of the first reference pulse and advanced relative to the crank angle position equivalent to top dead center of the piston of the engine, generating a third reference pulse at a third reference crank angle position delayed relative to the crank angle position equivalent to top dead center, and further generating a plurality of pulses in a section from the third reference crank angle position to the first reference crank angle position; andthe start-up ignition controller uses the second reference pulse as a reference to detect the start-up regular ignition position and the maximum delay angle position of the engine, and the parameter detection means detects as the rotational speed detection parameter the time required for the crankshaft to rotate from the first reference crank angle position to the second reference crank angle position. 12. An engine ignition control device having a start-up ignition controller for controlling ignition at start-up of an engine started up using human power and a normal-running ignition controller for controlling ignition during normal running; the engine ignition control device comprising parameter detection means for detecting, as a rotational speed detection parameter including information of the rotational speed of the engine, the time required for a crankshaft to rotate through a certain crank angle section immediately before a start-up regular ignition position, the start-up regular ignition position being set to a position angularly advanced relative to a crank angle position equivalent to a top dead center of a piston of the engine; and start-up rotation angle detection means for detecting as a start-up rotation angle the rotation angle of the crankshaft of the engine from the time a start-up operation of the engine is initiated; whereinthe start-up ignition controller is configured so that the engine is ignited at the regular ignition position when the parameter is less than a preset start-of-delaying-angle determination value, the engine is ignited at an ignition position delayed relative to the regular ignition position by an delaying angle amount that matches the magnitude of the parameter when the parameter is within a range equal to or greater than the start-of-delaying-angle determination value and equal to or less than a set end-of-delaying-angle determination value (greater than the start-of-delaying-angle determination value), and ignition of the engine is in the maximum delay angle position when the parameter has reached the end-of-delaying-angle determination value; andswitching means is provided for switching the start-of-delaying-angle determination value and the end-of-delaying-angle determination value in accordance with the detected start-up rotation angle such that when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is less than a set angle, there is created a kickback-preventive effect within a range at which engine startability is not compromised, and when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is equal to or greater than the set angle, there is created a kickback-preventive effect that is greater than the kickback-preventive effect for when the start-up rotation angle is less than the set angle. 13. An engine ignition control device having a start-up ignition controller for controlling ignition at start-up of an engine started up using human power and a normal-running ignition controller for controlling ignition during normal running; the engine ignition control device comprising parameter detection means for detecting, as a rotational speed detection parameter including information of the rotational speed of the engine, the time required for a crankshaft to rotate through a certain crank angle section immediately before a start-up regular ignition position, the start-up regular ignition position being set to a position angularly advanced relative to a crank angle position equivalent to a top dead center of a piston of the engine, and start-up rotation angle detection means for detecting as a start-up rotation angle the rotation angle of the crankshaft of the engine from the time a start-up operation of the engine is initiated; whereinthe start-up ignition controller is configured so that the engine is ignited at the regular ignition position when the parameter is less than a start-of-delaying-angle determination value, the engine is ignited at an ignition position delayed relative to the regular ignition position by an delaying angle amount that matches the magnitude of the parameter when the parameter is within a range equal to or greater than the start-of-delaying-angle determination value and equal to or less than a end-of-delaying-angle determination value (greater than the start-of-delaying-angle determination value), and the engine is ignited in the maximum delay angle position when the parameter has reached the end-of-delaying-angle determination value; andthere is provided switching means for switching the regular ignition position and the maximum delay angle position in accordance with the detected start-up rotation angle such that when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is less than a set angle, there is created a kickback-preventive effect within a range at which engine startability is not compromised, and when the start-up rotation angle detected by the start-up rotation angle detection means at the regular ignition position is equal to or greater than the set angle, there is created a kickback-preventive effect that is greater than the kickback-preventive effect for when the start-up rotation angle is less than the set angle. 14. The engine ignition control device of claim 12, wherein there is provided a crank angle sensor for generating a first reference pulse at a first reference crank angle position set to a position sufficiently angularly advanced relative to the crank angle position equivalent to top dead center of the piston of the engine, generating a second reference pulse at a second reference crank angle position set to a position immediately before the crank angle position equivalent to top dead center of the piston of the engine, generating a third reference pulse at a third reference crank angle position slightly delayed relative to the crank angle position equivalent to top dead center, and further generating a plurality of pulses in a section from the third reference crank angle position to the first reference crank angle position;the start-up ignition controller detects, as the start-up regular ignition position and the maximum delay angle position respectively of the engine, the position where the second reference pulse is generated and the position where the third reference pulse is generated by the crank angle sensor; and the parameter detection means detects the time required for the crankshaft to rotate from the first reference crank angle position to the second reference crank angle position as the rotational speed detection parameter; andthe start-up rotation angle detection means detects the start-up rotation angle from the pulse generated by the crank angle sensor. 15. The engine ignition control device of claim 13, wherein there is provided a crank angle sensor for generating a first reference pulse at a first reference crank angle position set to a position sufficiently angularly advanced relative to the crank angle position equivalent to top dead center of the piston of the engine, generating a second reference pulse at a second reference crank angle position set to a position immediately before the crank angle position equivalent to top dead center of the piston of the engine, and further generating a plurality of pulses in a section from the second reference crank angle position to the first reference crank angle position;the start-up ignition controller uses the second reference pulse as a reference to detect the start-up regular ignition position and the maximum delay angle position of the engine, and the parameter detection means detects the time required for the crankshaft to rotate from the first reference crank angle position to the second reference crank angle position as the rotational speed detection parameter; andthe start-up rotation angle detection means detects the start-up rotation angle from the pulse generated by the crank angle sensor.
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이 특허에 인용된 특허 (6)
Ott Karl (Markgroeningen DEX) Person Martin (Oberriexingen DEX) Walter Klaus (Bietigheim-Bissingen DEX) Wuerth Juergen (Freiberg DEX), Device for and a method of detecting the backward revolution of a revolving component of an internal combustion engine.
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