초록 ▼

The flow rate of intake air sucked into an internal combustion engine when a throttle valve of the engine is at the idling position is controlled so that the actual rotational speed of the engine becomes equal to a desired value. This desired value of the rotational speed of the engine is adjusted i

The flow rate of intake air sucked into an internal combustion engine when a throttle valve of the engine is at the idling position is controlled so that the actual rotational speed of the engine becomes equal to a desired value. This desired value of the rotational speed of the engine is adjusted in accordance with the result of a judgement as to whether the actual rotational speed of the engine is increasing or decreasing, and the value of the actual rotational speed of the engine.

대표청구항 ▼

A method of controlling the rotational speed of an internal combustion engine having an intake passage, a throttle valve disposed in said intake passage, and a bypass passage which communicates said intake passage at a position located upstream of said throttle valve with said intake passage at a po

A method of controlling the rotational speed of an internal combustion engine having an intake passage, a throttle valve disposed in said intake passage, and a bypass passage which communicates said intake passage at a position located upstream of said throttle valve with said intake passage at a position located downstream of said throttle valve, said method comprising the steps of: (a) providing a reference speed signal; (b) providing a rotational speed signal having a value corresponding to the actual rotational speed of said engine; (c) comparing said rotational speed signal and said reference speed signal; (d) increasing the flow of air through said bypass passage and decreasing said reference speed signal by a predetermined value for use in providing a next reference speed signal when said rotational speed signal is equal to or less than said reference speed signal, and decreasing the flow of air through said bypass passage when said rotational speed signal is greater than said reference speed signal; (e) repeating the steps (a), (b), (c) and (d) recited above at predetermined time intervals, whereby the difference between a respective rotational speed signal and a respective reference speed signal can be reduced.