Method and system for output control of internal combustion engine
First Claim
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1. A system for controlling the output of a multicylinder internal combustion engine comprising:
- an intake pipe for introducing air for combustion into said internal combustion engine;
fuel supplying means for supplying fuel to said engine;
an engine speed detector for detecting the rotational speed of said engine;
signal output means for producing an output signal corresponding to a required output of said engine and an acceleration signal corresponding to the acceleration of said engine; and
a control circuit, responsive to said detector and said signal output means, for;
(1) deciding an operating condition of said internal combustion engine on the basis of the output signal from said engine speed detector and said output signal, (2) calculating and storing an optimum negative pressure of said intake pipe for said operating condition, (3) interrupting the fuel supply to at least one of said cylinders in said combustion engine to make said at least one cylinder intermittently operate thereby controlling said engine to produce a torque with said optimum negative pressure of said intake pipe being reached, and (4) disabling said interrupting function upon acceleration so that all the cylinders of said engine can operate.
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Abstract
The number of working cylinders of the internal combustion engine is controlled so that the load of the internal combustion engine is relatively increased thereby to keep the combustion effect within an expected range. By controlling the number of working cylinders of the internal combustion engine also to other than integral numbers, the torque control of large freedom is continuously effected. Thus the torque characteristic is smoothed, thus improving the fuel efficiency and driveability at the same time.
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6 Claims
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1. A system for controlling the output of a multicylinder internal combustion engine comprising:
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an intake pipe for introducing air for combustion into said internal combustion engine; fuel supplying means for supplying fuel to said engine; an engine speed detector for detecting the rotational speed of said engine; signal output means for producing an output signal corresponding to a required output of said engine and an acceleration signal corresponding to the acceleration of said engine; and a control circuit, responsive to said detector and said signal output means, for;
(1) deciding an operating condition of said internal combustion engine on the basis of the output signal from said engine speed detector and said output signal, (2) calculating and storing an optimum negative pressure of said intake pipe for said operating condition, (3) interrupting the fuel supply to at least one of said cylinders in said combustion engine to make said at least one cylinder intermittently operate thereby controlling said engine to produce a torque with said optimum negative pressure of said intake pipe being reached, and (4) disabling said interrupting function upon acceleration so that all the cylinders of said engine can operate. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification