Fuel management system for variable ethanol octane enhancehment of gasoline engines
First Claim
1. Fuel management system for operation of a spark ignition gasoline engine comprising:
- a gasoline engine;
a source of an anti-knock agent;
an injector for direct injection of the anti-knock agent into a cylinder of the engine; and
a fuel management control system for controlling injection of the anti-knock agent into the cylinder to control knock.
2 Assignments
0 Petitions
Accused Products
Abstract
Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock and minimize that amount of the anti-knock agent that is used in a drive cycle. It is preferred that the anti-knock agent is ethanol. The use of ethanol can be further minimized by injection in a non-uniform manner within a cylinder. The ethanol injection suppresses knock so that higher compression ratio and/or engine downsizing from increased turbocharging or supercharging can be used to increase the efficiency of the engine.
-
Citations
56 Claims
-
1. Fuel management system for operation of a spark ignition gasoline engine comprising:
-
a gasoline engine;
a source of an anti-knock agent;
an injector for direct injection of the anti-knock agent into a cylinder of the engine; and
a fuel management control system for controlling injection of the anti-knock agent into the cylinder to control knock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25, 26, 27, 28, 29)
-
-
21-23. -23. (canceled)
-
30. Fuel management system for operation of a spark ignition gasoline engine comprising:
-
a gasoline engine;
a source of ethanol;
an injector for direct injection of the ethanol into a cylinder of the engine; and
a fuel management control system for controlling injection of the ethanol into the cylinder when engine torque is above a selected fraction of maximum torque. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
-
Specification