A fuel supply control method and apparatus for internal combustion engines

Claim 2

A fuel supply control method for an internal combustion engine which includes suction air amount control means (3, 5) for supplying a predetermined amount of air for the engine; air amount detecting means (5) for producing an air amount signal (2) in proportion to the amount of the air supplied by said suction air amount control means (3, 5); fuel supply means (13) for supplying a predetermined amount of fuel in response to a fuel supply signal (PF); additional air amount control means (9, 11) for supplying a predetermined amount of additional air for the engine by by-passing said suction air amount control means; engine speed detecting means (29) for detecting a number of revolutions of the engine and producing a number-of-revolution signal in proportion thereto; a control unit (35) including a built-in microprocessor, in which a predetermined processing is executed on the basis of the air amount signal (2) and the number-of-revolution signal (N) to produce the fuel supply signal (PF); and switch means (37), which is manipulated when auxiliary equipment (33) of a car is required to operate and produces a load request signal (S L ) corresponding to the auxiliary equipment required to operate, characterized by following steps: - identifying a kind of auxiliary equipment required to operate on the basis of the load request signal (S L ); - retrieving the amount of an increment of fuel in a table prepared in advance within said control unit means on the basis of the identified kind of the auxiliary equipment; - correcting an amount of fuel represented by the fuel supply signal (P F ) in accordance with the retrieved incremental amount of fuel and outputting a corrected fuel supply signal to said fuel supply means (13); - retrieving the amount of additional air in a table prepared in advance within said control unit on the basis of the incremental amount of fuel and outputting an air increment signal representative of the retrieved amount of additional air to said additional air amount control means (9, 11); and - producing an actuating signal (L) for actuating the auxiliary equipment (33) required to operate after the air increment signal is produced.

Claim 3

A fuel supply control method according to claim 1, characterized in that the air increment signal is output to said additional air amount control means (9, 11) at a predetermined time after the corrected fuel supply signal (P F ) is produced to said fuel supply means (13).

Claim 4

A fuel supply control method according to claim 1, characterized in that the actuating signal (L) is output to the auxiliary equipment required to operate, when the number of revolutions (N) of the engine becomes larger than a predetermined value.

Claim 5

A fuel supply control method according to claim 1, characterized in that the actuating signal (L) is output to the auxiliary equipment required to operate at a predetermined time after the air increment signal (S A ) is output to said additional air amount control means (9, 11).

Claim 6

A fuel supply control apparatus for an internal combustion engine, having: suction air amount control means (3, 5) for supplying a predetermined amount of air for the engine; air amount detecting means (5) for producing an air amount signal (2) in proportion to the amount of the air supplied by said suction air amount control means (3, 5); fuel supply means (13) for supplying a predetermined amount of fuel in response to a fuel supply signal (PF); additional air amount control means (9, 11) for supplying a predetermined amount of additional air for the engine by by-passing said suction air amount control means; engine speed detecting means (29) for detecting a number of revolutions of the engine and producing a number-of-revolution signal in proportion thereto; a control unit (35) including a built-in microprocessor, in which a predetermined processing is executed on the basis of the air amount signal (2) and the number-of-revolution signal (N) to produce the fuel supply signal (PF); and switch means (37), which is manipulated when auxiliary equipment (33) of a car is required to operate and produces a load request signal (S L ) corresponding to the auxiliary equipment required to operate, characterized in that the microprocessor further comprises means for - identifying a kind of auxiliary equipment required to operate on the basis of the load request signal (S L ): - retrieving the amount of an increment of fuel in a table prepared in advance within said control unit means on the basis of the identified kind of the auxiliary equipment; - correcting an amount of fuel represented by the fuel supply signal (P F ) in accordance with the retrieved incremental amount of fuel and outputting a corrected fuel supply signal to said fuel supply means (13); - retrieving the amount of additional air in a table prepared in advance within said control unit on the basis of the incremental amount of fuel and outputting an air increment signal representative of the retrieved amount of additional air to said additional air amount control means (9, 11); and - producing an actuating signal (L) for actuating the auxiliary equipment (33) required to operate after the air increment signal is produced.

Claim 7

A fuel supply control apparatus for an internal combustion engine, having: suction air amount control means (3, 5) for supplying a predetermined amount of air for the engine; air amount detecting means (5) for producing an air amount signal (2) in proportion to the amount of the air supplied by said suction air amount control means (3, 5); fuel supply means (13) for supplying a predetermined amount of fuel in response to a fuel supply signal (PF); additional air amount control means (9, 11) for supplying a predetermined amount of additional air for the engine by by-passing said suction air amount control means; engine speed detecting means (29) for detecting a number of revolutions of the engine and producing a number-of-revolution signal in proportion thereto; a control unit (35) including a built-in microprocessor, in which a predetermined processing is executed on the basis of the air amount signal (2) and the number-of-revolution signal (N) to produce the fuel supply signal (PF); and switch means (37), which is manipulated when auxiliary equipment (33) of a car is required to operate and produces a load request signal (S L ) corresponding to the auxiliary equipment required to operate, characterized in that the microprocessor further comprises means for - identifying a kind of auxiliary equipment required to operate on the basis of the load request signal (S L ): - retrieving the amount of an increment of fuel in a table prepared in advance within said control unit means on the basis of the identified kind of the auxiliary equipment; - correcting an amount of fuel represented by the fuel supply signal (P F ) in accordance with the retrieved incremental amount of fuel and outputting a corrected fuel supply signal to said fuel supply means (13); - retrieving the amount of additional air in a table prepared in advance within said control unit on the basis of the incremental amount of fuel and outputting an air increment signal representative of the retrieved amount of additional air to said additional air amount control means (9, 11); and - producing an actuating signal (L) for actuating the auxiliary equipment (33) required to operate after the air increment signal is produced.

Claim 8

A fuel supply control apparatus as defined in claim 5, wherein the air increment signal is output to said additional air amount control means (9, 11) at a predetermined time after the corrected fuel supply signal (P F ) is produced to said fuel supply means (13).

Claim 9

A fuel supply control apparatus as defined in claim 5, wherein the actuating signal (L) is output to the auxiliary equipment required to operate, when the number of revolutions (N) of the engine becomes larger than a predetermined value.

Claim 10

A fuel supply control apparatus as defined in claim 5, wherein the actuating signal (L) is output to the auxiliary equipment required to operate at a predetermined time after the air increment signal (S A ) is output to said additional air amount control means (9, 11).