EP0222403A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
System for controlling electronic fuel injection to internal combustion engine
Assignee: Hitachi Ltd
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Filing: 1986-11-13
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Granted: —
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Expires: 2006-11-13
Abstract
Abstract A method and a system for controlling fuel injection to an internal combustion engine (11) by electronic circuits (12-19). A plurality of cylinders (1-6) installed in the internal combustion engine (11) are divided into two groups and two electronic circuits (12, 13) for controlling the respective two cylinder groups (1, 3, 5,; 2, 4, 6) are provided. By comparing the outputs of the two electronic circuits (12, 13) whether the operations of the respective electronic circuits are normal or not is judged. The fuel injection controlled by the electronic circuit (12, 13) which has been judged to be abnormal is stopped, while the fuel injection controlled by the electronic circuit which has been judged to be normal is continued. Thus, the internal combustion engine is driven solely by one group of cylinders (1, 3, 5,; 2, 4, 6).
Inventors
- 👤 Mikihiko Ohnari
- 👤 Motohisa Funabashi
- 👤 Makoto Shioya
- 👤 Teruji Sekozawa
- 👤 Masami Shida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 05:42
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/266; F02D17/00; F02D17/02; F02D41/008; F02D41/0087
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
A method of controlling an electronic fuel injection to an internal combustion engine comprising the steps of: dividing a plurality of cylinders installed on said internal combustion engine into two groups; providing a plurality of injectors on each group of cylinders, and dividing said injectors into two groups in correspondence with said two groups of cylinders; providing two electronic circuits for controlling said two groups of injectors, respectively, comparing the calculated outputs of fuel injection supplied from said two electronic control circuits, respectively; judging whether or not the operations of said two electronic circuit are normal on the basis of the result of comparison; and stopping the fuel injection which is controlled by the electronic circuit which has been judged to be abnormal, while continuing the fuel injection which is controlled by the electronic circuit which has been judged to be normal.
Claim 2
Independent Claim
142 words
A method of controlling an electronic fuel injection to an internal combustion engine comprising the steps of: dividing a plurality of cylinders installed on said internal combustion engine into two groups; providing a plurality of injectors on each group of cylinders, and dividing said injectors into two groups in correspondence with said two groups of cylinders; providing two electronic circuits for controlling said two groups of injectors, respectively, comparing the calculated outputs of fuel injection supplied from said two electronic control circuits, respectively; judging whether or not the operations of said two electronic circuit are normal on the basis of the result of comparison; and stopping the fuel injection which is controlled by the electronic circuit which has been judged to be abnormal, while continuing the fuel injection which is controlled by the electronic circuit which has been judged to be normal.
Claim 3
Dependent Claim
43 words
A method according to Claim 1, wherein the results of calculation which are respectively output from said two electronic circuits are displayed to the driver and are judged by said driver whether or not the respective operations of said electronic circuits are normal.
Claim 4
Dependent Claim
90 words
A fuel injection control system for an internal combustion engine, characterized by - two groups of electronic control circuits (12, 13) for controlling two groups of injectors corresponding to two respective groups of cylinders (1, 3, 5; 2, 4, 6) of said internal combustion engine (11), - a synchronization unit (16, 19) synchronizing the injection control of the electronic circuits, - decision circuits (14, 15) deciding whether or not a control circuit (12, 13) is defect and - indication means indicating the driver which control system is out of order.
Claim 5
Dependent Claim
90 words
A fuel injection control system for an internal combustion engine, characterized by - two groups of electronic control circuits (12, 13) for controlling two groups of injectors corresponding to two respective groups of cylinders (1, 3, 5; 2, 4, 6) of said internal combustion engine (11), - a synchronization unit (16, 19) synchronizing the injection control of the electronic circuits, - decision circuits (14, 15) deciding whether or not a control circuit (12, 13) is defect and - indication means indicating the driver which control system is out of order.
References Cited (Backward Citations)
No citation records indexed.
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