Method for controlling operating state of an internal combustion engine with an overshoot preventing function
First Claim
1. A method for controlling an operating state of an internal combustion engine having an intake air passage with a throttle valve, comprising:
- detection step for detecting a pressure in the intake air passage of the engine downstream of the throttle valve and producing a pressure signal;
calculation step for calculating a difference between a latest sampled value of said pressure signal and a preceding sampled value of said pressure signal, and adding a value corresponding to said difference to said latest sampled value to produce a corrected pressure value; and
controlling step for controlling an amount of fuel to be supplied to the engine on the basis of said corrected pressure value, wherein said corrected pressure value is made equal to a predetermined value when said corrected pressure value becomes greater than said predetermined value.
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Abstract
A method for controlling an operating state of an internal combustion engine by varying the amount of the fuel according to the pressure level in the intake air passage downstream of the throttle valve, comprises a step for sampling a signal of the pressure level in the intake air passage, a step for correcting the sampled value by adding a value corresponding to a difference between a latest sampled value and a preceding sampled value, to the latest sampled value, and a step for controlling the fuel supply amount according to the corrected value. The method further includes a step for controlling the level of the corrected value to a predetermined value when the level of the corrected value is becoming greater than the predetermined value, to prevent the generation of an overshoot in the corrected value which might cause an adverse affect on the air/fuel ratio control.
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Citations
5 Claims
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1. A method for controlling an operating state of an internal combustion engine having an intake air passage with a throttle valve, comprising:
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detection step for detecting a pressure in the intake air passage of the engine downstream of the throttle valve and producing a pressure signal; calculation step for calculating a difference between a latest sampled value of said pressure signal and a preceding sampled value of said pressure signal, and adding a value corresponding to said difference to said latest sampled value to produce a corrected pressure value; and controlling step for controlling an amount of fuel to be supplied to the engine on the basis of said corrected pressure value, wherein said corrected pressure value is made equal to a predetermined value when said corrected pressure value becomes greater than said predetermined value. - View Dependent Claims (2, 3, 4, 5)
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Specification