Cylinder identifying system for internal combustion engine
First Claim
1. A cylinder identifying system for an internal combustion engine, comprising:
- crank angle signal detecting means for generating a crank angle pulse signal composed of pulse trains each containing a reference position in synchronism with rotation of a crank shaft of said internal combustion engine;
a cam shaft rotating at a speed corresponding to one half of that of said crank shaft;
cam signal detecting means for generating a cam pulse signal including specific pulses identifying individual cylinders, respectively, of said internal combustion engine in synchronism with rotation of said cam shaft; and
cylinder identifying means for identifying said individual cylinders, respectively, of said internal combustion engine on the basis of said crank angle pulse signal and said cam pulse signal, wherein said cylinder identifying means includes;
pulse signal number storage means for dividing an ignition control period for each of said individual cylinders into a plurality of subperiods for thereby counting for storage signal numbers of said specific pulses generated during said plurality of subperiods, respectively; and
subperiod discriminating means for determining discriminatively a sequential order of said plural subperiods on the basis of combinations of the signal numbers of said specific pulses generated during said plural subperiods, respectively, wherein said combinations of the signal numbers of said specific pulses generated during said plural subperiods differ from one to another correspondingly to said plural subperiods in dependence on start points of said plural subperiods, respectively, and wherein said cylinder identifying means is so designed as to identify said individual cylinders on the basis of results of said discriminative determination of said subperiods performed by said subperiod discriminating means independently of the start points of said plural subperiods.
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Accused Products
Abstract
A cylinder identifying system for an internal combustion engine enables fuel injection and ignition controls for individual cylinders to be speedily performed upon starting of engine. A cylinder identifying means (10) operating on the basis of a crank angle signal (SGT) and a cam signal (SGC) includes a pulse signal number storage means (12) for dividing an ignition control period of each cylinder into plural subperiods for counting for storage signal numbers of specific pulses generated over plural subperiods, and a subperiod discriminating means (14) for determining discriminatively a sequential order of the plural subperiods on the basis of combinations of the numbers of the specific pulses generated during the plural subperiods. The combinations of the numbers of specific pulses generated during the plural subperiods differ one another correspondingly to the plural subperiods independently from the start points thereof. The cylinder identifying means (10) identifies the individual cylinders on the basis of results of determination made by the subperiod discriminating means (14) independently of positional relationships between the storage start points and the subperiods.
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Citations
9 Claims
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1. A cylinder identifying system for an internal combustion engine, comprising:
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crank angle signal detecting means for generating a crank angle pulse signal composed of pulse trains each containing a reference position in synchronism with rotation of a crank shaft of said internal combustion engine;
a cam shaft rotating at a speed corresponding to one half of that of said crank shaft;
cam signal detecting means for generating a cam pulse signal including specific pulses identifying individual cylinders, respectively, of said internal combustion engine in synchronism with rotation of said cam shaft; and
cylinder identifying means for identifying said individual cylinders, respectively, of said internal combustion engine on the basis of said crank angle pulse signal and said cam pulse signal, wherein said cylinder identifying means includes;
pulse signal number storage means for dividing an ignition control period for each of said individual cylinders into a plurality of subperiods for thereby counting for storage signal numbers of said specific pulses generated during said plurality of subperiods, respectively; and
subperiod discriminating means for determining discriminatively a sequential order of said plural subperiods on the basis of combinations of the signal numbers of said specific pulses generated during said plural subperiods, respectively, wherein said combinations of the signal numbers of said specific pulses generated during said plural subperiods differ from one to another correspondingly to said plural subperiods in dependence on start points of said plural subperiods, respectively, and wherein said cylinder identifying means is so designed as to identify said individual cylinders on the basis of results of said discriminative determination of said subperiods performed by said subperiod discriminating means independently of the start points of said plural subperiods. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification