HIGH EFFICIENCY NATURAL GAS/GASOLINE BI-FUEL ENGINES USING ON-DEMAND KNOCK CONTROL
First Claim
1. A spark ignition engine where gasoline is introduced from a first fuel tank and, where, for a first torque range, natural gas is introduced from a second fuel tank and where, for a second torque range, a anti-knock agent is directly injected from a third fuel tank.
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Accused Products
Abstract
A bi-fuel spark ignition engine is disclosed. The engine can operate on either gasoline, natural gas or a combination of the two. The amount of each fuel that is used by the engine is based on the engine'"'"'s operating parameters, such as RPM and torque. In some embodiments, the operator can provide input, such as the availability of natural gas, which affects the operation of the engine. In some embodiments, an anti-knock agent is used to prevent knock at higher values of torque.
55 Citations
33 Claims
- 1. A spark ignition engine where gasoline is introduced from a first fuel tank and, where, for a first torque range, natural gas is introduced from a second fuel tank and where, for a second torque range, a anti-knock agent is directly injected from a third fuel tank.
- 8. A spark ignition engine where gasoline is introduced from a first source and natural gas is introduced into said engine from a second source, and wherein said engine would knock without the introduction of said natural gas.
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13. A spark ignition engine and fuel system comprising:
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a spark ignition engine; a first fuel source for providing gasoline to said spark ignition engine; and a second fuel source for providing a fluid or gas which includes methane to said spark ignition engine and wherein said engine is simultaneously fueled with said gasoline and said methane, and wherein the amount of said methane is varies so as to prevent knock. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A spark ignition and fuel system comprising:
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a first tank containing gasoline; a second tank containing a gas or fluid which includes methane; and a third tank containing an anti-knock agent which is directly injected into a cylinder of said engine, and where said engine can be operated on either a combination of gasoline and methane, a combination of gasoline and anti-knock agent, a combination of gasoline, methane and anti-knock agent, or a combination of methane and anti-knock agent. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A spark ignition engine and fuel system comprising
a first tank containing gasoline; -
a second tank containing a fluid comprising methane; and a third tank containing water which is directly injected into a cylinder in said engine, and wherein said engine can be operated with gasoline and directly injected water, or gasoline and a gas or fluid which includes methane, or fluid comprising methane and directly injected water, or gasoline, fluid comprising methane and directly injected water, and wherein the ratios of said gasoline, methane and water are controlled so as to avoid knock.
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Specification