Ignition timing control system for internal combustion engines

Claim 2

An ignition timing control system for an internal combustion engine having a crankshaft, comprising: magnetic pick-up means for magnetically sensing the angular position of the crankshaft and for generating an output signal indictive thereof; and control means for controlling the ignition timing of the engine based on the output signal from said magnetic pick-up means, wherein said control means includes correction means for correcting a basic ignition timing, which is determined in accordance with at least one engine operating parameter, by the use of a correction value, which is determined in accordance with a time delay in the generation of the output signal from said magnetic pick-up means with respect to the angular position of the crankshaft and which increases with a rise in the rotational speed of the engine.

Claim 3

An ignition timing control system for an internal combustion engine having at least one cylinder and a crankshaft, comprising: first magnetic pick-up means for magnetically sensing a predetermined reference angular position of the crankshaft per each of the at least one cylinder for generating a first output signal indicative thereof; second magnetic pick-up means for magnetically sensing a plurality of angularly equally spaced predetermined angular positions of the crankshaft per each of the at least one cylinder for generating a second output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the first and second output signals from said first and second magnetic pick-up means, wherein said control means includes correction means for correcting the ignition timing to be controlled by the control means for a time delay in the generation of at least one of the first and second output signals with respect to the angular position of the crankshaft, said time delay increasing with a rise in the rotational speed of the engine.

Claim 4

An ignition timing control system for an internal combustion engine having at least one cylinder and a crankshaft, comprising: first magnetic pick-up means for magnetically sensing a predetermined reference angular position of the crankshaft per each of the at least one cylinder for generating a first output signal indicative thereof; second magnetic pick-up means for magnetically sensing a plurality of angularly equally spaced predetermined angular positions of the crankshaft per each of the at least one cylinder for generating a second output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the first and second output signals from said first and second magnetic pick-up means, wherein said control means includes correction means for correcting the ignition timing to be controlled by the control means for a time delay in the generation of at least one of the first and second output signals with respect to the angular position of the crankshaft, said time delay increasing with a rise in the rotational speed of the engine.

Claim 5

An ignition timing control system for an internal combustion engine having a crankshaft, comprising: magnetic pick-up means for magnetically sensing the angular position of the crankshaft and for generating an output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the output signal from said magnetic pick-up means, wherein said control means includes correction means for correcting a basic ignition timing, which is determined in accordance with at least one engine operating parameter, by the use of a correction value, which is determined in accordance with a time delay in the generation of the output signal from said magnetic pick-up means with respect to the angular position of the crankshaft and which increases with a rise in the rotational speed of the engine, wherein said correction means includes memory means for storing a plurality of correction values corresponding respectively to values of the rotational speed of the engine for correcting the ignition timing.

Claim 6

An ignition timing control system for an internal combustion engine having a crankshaft, comprising: magnetic pick-up means for magnetically sensing the angular position of the crankshaft and for generating an output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the output signal from said magnetic pick-up means, wherein said control means includes correction means for correcting a basic ignition timing, which is determined in accordance with at least one engine operating parameter, by the use of a correction value, which is determined in accordance with a time delay in the generation of the output signal from said magnetic pick-up means with respect to the angular position of the crankshaft and which increases with a rise in the rotational speed of the engine, wherein said correction means includes memory means for storing a plurality of correction values corresponding respectively to values of the rotational speed of the engine for correcting the ignition timing.

Claim 7

An ignition timing control system for an internal combustion engine having at least one cylinder and a crankshaft, comprising: first magnetic pick-up means for magnetically sensing a predetermined reference angular position of the crankshaft per each of the at least one cylinder, and for generating a first output signal indicative thereof; second magnetic pick-up means for magnetically sensing a plurality of angularly equally spaced predetermined angular positions of the crankshaft per each of the at least one cylinder, and for generating a second output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the first and second output signals from said first and second magnetic pick-up means, wherein said control means includes correction means for correcting the ignition timing to be controlled by the control means for a time delay in the generation of at least one of the first and second output signals with respect to the angular position of the crankshaft, said time delay increasing with a rise in the rotational speed of the engine, wherein said correction means includes memory means for storing a plurality of correction values corresponding respectively to values of the rotational speed of the engine for correcting the ignition timing.

Claim 8

An ignition timing control system for an internal combustion engine having at least one cylinder and a crankshaft, comprising: first magnetic pick-up means for magnetically sensing a predetermined reference angular position of the crankshaft per each of the at least one cylinder, and for generating a first output signal indicative thereof; second magnetic pick-up means for magnetically sensing a plurality of angularly equally spaced predetermined angular positions of the crankshaft per each of the at least one cylinder, and for generating a second output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the first and second output signals from said first and second magnetic pick-up means, wherein said control means includes correction means for correcting the ignition timing to be controlled by the control means for a time delay in the generation of at least one of the first and second output signals with respect to the angular position of the crankshaft, said time delay increasing with a rise in the rotational speed of the engine, wherein said correction means includes memory means for storing a plurality of correction values corresponding respectively to values of the rotational speed of the engine for correcting the ignition timing.

Claim 9

An ignition timing control system for an internal combustion engine having a crankshaft, comprising: magnetic pick-up means for magnetically sensing the angular position of the crankshaft and for generating an output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the output signal from said magnetic pick-up means, wherein said control means includes correction means for correcting a basic ignition timing, represented as a digital value which is determined in accordance with at least one engine operating parameter, by the use of a correction value, represented as a digital value which is determined in accordance with a time delay in the generation of the output signal from said magnetic pick-up means with respect to the angular position of the crankshaft and which increases with a rise in the rotational speed of the engine.

Claim 10

An ignition timing control system for an internal combustion engine having a crankshaft, comprising: magnetic pick-up means for magnetically sensing the angular position of the crankshaft and for generating an output signal indicative thereof; and control means for controlling the ignition timing of the engine based on the output signal from said magnetic pick-up means, wherein said control means includes correction means for correcting a basic ignition timing, represented as a digital value which is determined in accordance with at least one engine operating parameter, by the use of a correction value, represented as a digital value which is determined in accordance with a time delay in the generation of the output signal from said magnetic pick-up means with respect to the angular position of the crankshaft and which increases with a rise in the rotational speed of the engine.