Electronic control system for an internal combustion engine
First Claim
1. An electronic control system for an internal combustion engine which is supplied with gasoline from a fuel supply source, said system comprising:
- gasoline-property detecting means for detecting a property of said gasoline;
operating-condition detecting means for detecting an operating condition of said engine;
control-amount determining means for determining a gasoline-property-responsive control amount of said engine in accordance with said gasoline property detected by said gasoline-property detecting means and said engine operating condition detected by said operating-condition detecting means, said control-amount determining means including;
fuel injection rate determining means for determining a rate of fuel injection into said engine in accordance with said gasoline property detected by said gasoline-property detecting means;
control means for controlling said engine in accordance with said gasoline-property-responsive control amount determined by said control-amount determining means; and
improper-operation preventing means for detecting an improper controlled state of said engine, and for suppressing a gasoline-property-responsive control, which is controlled via said control-amount determining means, when said improper controlled state of said engine is detected, said improper-operation preventing means including;
first suppressing means for suppressing said gasoline-property-responsive control when;
said fuel rate injection determining means determines said fuel injection rate is enriching an air-fuel mixture supplied to said engine; and
said air-fuel mixture becomes richer than a predetermined air-fuel ratio.
1 Assignment
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Accused Products
Abstract
An electronic control system for an internal combustion engine. The system detects a property of the gasoline such as a vaporization characteristic by using refractive indexes. The system then detects various operating conditions of the engine. The system also determines various control amounts of the engine in accordance with the detected gasoline property and the various engine operating conditions. The system may determine a rate of fuel injection into the engine in accordance with the detected gasoline property. The system also controls the engine in accordance with the various control amount. Finally, the system detects that the engine is in an improper controlled state and may suppress one or more of the controls.
30 Citations
19 Claims
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1. An electronic control system for an internal combustion engine which is supplied with gasoline from a fuel supply source, said system comprising:
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gasoline-property detecting means for detecting a property of said gasoline; operating-condition detecting means for detecting an operating condition of said engine; control-amount determining means for determining a gasoline-property-responsive control amount of said engine in accordance with said gasoline property detected by said gasoline-property detecting means and said engine operating condition detected by said operating-condition detecting means, said control-amount determining means including; fuel injection rate determining means for determining a rate of fuel injection into said engine in accordance with said gasoline property detected by said gasoline-property detecting means; control means for controlling said engine in accordance with said gasoline-property-responsive control amount determined by said control-amount determining means; and improper-operation preventing means for detecting an improper controlled state of said engine, and for suppressing a gasoline-property-responsive control, which is controlled via said control-amount determining means, when said improper controlled state of said engine is detected, said improper-operation preventing means including; first suppressing means for suppressing said gasoline-property-responsive control when; said fuel rate injection determining means determines said fuel injection rate is enriching an air-fuel mixture supplied to said engine; and said air-fuel mixture becomes richer than a predetermined air-fuel ratio. - View Dependent Claims (3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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2. An electric control system for an internal combustion engine which is supplied with gasoline from a fuel supply source, said system comprising:
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gasoline-property detecting means for detecting a property of said gasoline; operating-condition detecting means for detecting an operating condition of said engine; control-amount determining means for determining a gasoline-property-responsive control amount of said engine in accordance with said gasoline property detected by said gasoline-property detecting means and said engine operating condition detected by said operating-condition detecting means, said control-amount determining means including; fuel injection rate determining means for determining a rate of fuel injection into said engine in accordance with said gasoline property detected by said gasoline-property detecting means; control means for controlling said engine in accordance with said gasoline-property-responsive control amount determined by said control-amount determining means; and improper-operation preventing means for detecting an improper controlled state of said engine, and for suppressing said gasoline-property-responsive control, which is controlled via said control-amount determining means, when said improper controlled state of said engine is detected, said improper-operation preventing means including; suppressing means for suppressing said gasoline-property-responsive control when; said fuel rate injection determining means determines said fuel injection rate is making an air-fuel mixture supplied to said engine leaner; and said air-fuel mixture becomes leaner than a predetermined air-fuel ratio. - View Dependent Claims (6)
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18. An apparatus for controlling an engine that includes means for mixing air and fuel into an air-fuel mixture, and means for burning said air-fuel mixture, the apparatus comprising:
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means for detecting a property of said fuel; means for controlling an operating condition of said engine in accordance with said property of said fuel, which is detected by said detecting means; means for determining whether said controlling of said operating condition of said engine by said controlling means is improper; and means for suppressing said controlling of said operating condition of said engine by said controlling means when said determining means determines that said controlling of said operating condition of said engine by said controlling means is improper.
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19. An apparatus for controlling an engine that includes means for mixing air and fuel into an air-fuel mixture, and means for burning said air-fuel mixture, said apparatus comprising:
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means for detecting a vaporization characteristics of said fuel; means for controlling an operating condition of said engine in accordance with said vaporization characteristics of said fuel, which is detected by said detecting means; means for determining whether said controlling of said operating condition of said engine by said controlling means is improper; and means for suppressing said controlling of said operating condition of said engine by said controlling means when said determining means determines said controlling of said operating condition of said engine by said controlling means is improper.
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Specification