Fuel injection means for an internal combustion engine of an automobile
First Claim
1. A fuel injection control system for an internal combustion engine having a fuel injection valve responsive to a fuel injection drive signal, an engine revolution sensor, and an acceleration detector for detecting an acceleration demand, said control system comprising:
- an arithmetic circuit responsive to an engine operating condition indicative signal for producing a fuel injection signal having a pulse width representative of the engine operating condition signal;
a drive signal generator responsive to said fuel injection signal for producing said fuel injection drive signal, said drive signal having a pulse width proportional to the pulse width of said fuel injection signal;
a timing signal generator for controlling and activating said drive signal generator, said timing signal generator being responsive to said engine revolution sensor to generate timing signals for activating said drive signal generator periodically and in synchronism with the revolution of the engine, said timing signal generator comprising means, responsive to a detected acceleration demand, for transiently generating an acceleration demanded timing signal for effecting a fuel injection in response to said acceleration demand, said means for transiently generating said acceleration demanded timing signal being operable to count a number of crank reference angle signals generated by said engine revolution sensor after a preceding injection drive signal, andwhen the number of said crank reference angle signal counted is less than a predetermined value, to generate, in response to an acceleration demand, said acceleration demanded timing signal in response to a crank reference angle signal generated immediately subsequent to said acceleration demand and to generate subsequent timing signals in response to a predetermined count of crank reference angle signals, andwhen the crank reference angle signal count is equal to or more than said predetermined value, to generate said timing signals in response to said predetermined count of crank reference angle signals.
0 Assignments
0 Petitions
Accused Products
Abstract
A fuel injection means for an internal combustion engine of an automobile is disclosed which comprises a pulse length determination circuit which receives a driving condition signal and develops a signal of a pulse length corresponding to the driving condition, a fuel injection starting signal generator circuit which develops a fuel injection starting signal and a driving signal generator circuit which develops a driving signal of a pulse length corresponding to that of the signal from the pulse length determination circuit. The driving signal thus developed is sent to a fuel injection valve, thereby fuel of a reliably controlled quantity is injected with a reliably controlled timing not only during usual driving condition but also during acceleration.
-
Citations
22 Claims
-
1. A fuel injection control system for an internal combustion engine having a fuel injection valve responsive to a fuel injection drive signal, an engine revolution sensor, and an acceleration detector for detecting an acceleration demand, said control system comprising:
-
an arithmetic circuit responsive to an engine operating condition indicative signal for producing a fuel injection signal having a pulse width representative of the engine operating condition signal; a drive signal generator responsive to said fuel injection signal for producing said fuel injection drive signal, said drive signal having a pulse width proportional to the pulse width of said fuel injection signal; a timing signal generator for controlling and activating said drive signal generator, said timing signal generator being responsive to said engine revolution sensor to generate timing signals for activating said drive signal generator periodically and in synchronism with the revolution of the engine, said timing signal generator comprising means, responsive to a detected acceleration demand, for transiently generating an acceleration demanded timing signal for effecting a fuel injection in response to said acceleration demand, said means for transiently generating said acceleration demanded timing signal being operable to count a number of crank reference angle signals generated by said engine revolution sensor after a preceding injection drive signal, and when the number of said crank reference angle signal counted is less than a predetermined value, to generate, in response to an acceleration demand, said acceleration demanded timing signal in response to a crank reference angle signal generated immediately subsequent to said acceleration demand and to generate subsequent timing signals in response to a predetermined count of crank reference angle signals, and when the crank reference angle signal count is equal to or more than said predetermined value, to generate said timing signals in response to said predetermined count of crank reference angle signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A fuel injection control system for an internal combustion engine having a fuel injection valve responsive to a fuel injection drive signal, an engine revolution sensor, and an acceleration detector for detecting an acceleration demand, said control system comprising:
-
an arithmetic circuit responsive to an engine operating condition indicative signal for producing a fuel injection signal having a pulse width representative of the engine operating condition; a drive signal generator responsive to said fuel injection signal for producing said fuel injection drive signal, said drive signal having a pulse width proportional to the pulse width of said fuel injection signal; a timing signal generator for controlling and activating said drive signal generator, said timing signal generator being responsive to said engine revolution sensor to generate timing signals for activating said drive signal generator periodically and in synchronism with the revolution of the engine, said timing signal generator including means, responsive to a detected acceleration demand, for transiently generating an acceleration demanded timing signal for effecting fuel injection in response to said acceleration demand, said means for transiently generating said acceleration demanded timing signal being operable to count a number of crank reference angle signals generated after a preceding injection drive signal; and when the number of said crank reference angle signal counted is less than a predetermined value, to generate, in response to an acceleration demand, said acceleration demanded timing signal in response to a crank reference angle signal occurring immediately subsequent to said acceleration demand and to generate subsequent timing signals in response to a predetermined count of crank reference angle signals, and when the crank reference angle signal count is equal to or more than said predetermined value, to generate said timing signals in response to said acceleration demand indicative signal and in response to a crank reference angle signals occurring immediately subsequent to said acceleration demand, and thereafter, in response to said predetermined count of crank reference angle signals. - View Dependent Claims (18, 19, 20, 21, 22)
-
Specification