Fuel Injection Strategies in Opposed-Piston Engines with Multiple Fuel Injectors
First Claim
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1. A method of operating fuel injectors located for direct side injection of fuel into a cylinder of an opposed-piston engine, comprising:
- causing a pair of opposed pistons to move in the cylinder; and
,injecting fuel from first and second fuel injectors into a combustion chamber of the engine defined between the end surfaces of the pistons as the pistons approach top dead center locations, such that fuel injected by the first fuel injector includes at least a pilot injection followed by a main injection, and fuel injected by the second fuel injector includes at least a pilot injection followed by a main injection.
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Abstract
In an opposed-piston engine, two or more fuel injectors are mounted to a cylinder for direct side injection into the cylinder. The injectors are controlled so as to inject either a single fuel pulse or a plurality of fuel pulses per cycle of engine operation in order to initiate combustion during varying engine speeds and operating conditions.
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Citations
28 Claims
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1. A method of operating fuel injectors located for direct side injection of fuel into a cylinder of an opposed-piston engine, comprising:
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causing a pair of opposed pistons to move in the cylinder; and
,injecting fuel from first and second fuel injectors into a combustion chamber of the engine defined between the end surfaces of the pistons as the pistons approach top dead center locations, such that fuel injected by the first fuel injector includes at least a pilot injection followed by a main injection, and fuel injected by the second fuel injector includes at least a pilot injection followed by a main injection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating fuel injectors located for direct side injection of fuel into a cylinder of an opposed-piston engine, comprising:
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causing a pair of opposed pistons to move in the cylinder; and
,injecting fuel from first and second fuel injectors between the end surfaces of the pistons as the pistons approach top dead center locations, in which fuel is injected by the first fuel injector with a first split injection, and fuel is injected by the second fuel injector with a second split injection. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A fuel injection system for an opposed-piston engine, comprising:
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at least one cylinder with a pair of pistons disposed in opposition for movement between top and bottom dead center positions therein; a plurality of fuel injectors positioned for direct side injection of fuel into the cylinder, between the pistons; a control unit responsive to engine operating conditions for generating fuel injection control signals; and
,an injector driver responsive to first control signals for generating fuel injector actuation signals operative to cause a first fuel injector to emit a first split injection and to cause a second fuel injector to emit a second split injection. - View Dependent Claims (22, 23, 24, 25)
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26. A fuel injection system for an opposed-piston engine, comprising:
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at least one cylinder with a pair of pistons disposed in opposition for movement between top and bottom dead center positions therein; a plurality of fuel injectors positioned for direct side injection of fuel into the cylinder, between the pistons; a control unit responsive to engine operating conditions for generating fuel injection control signals when the pistons are near top dead center locations in the cylinder; and
,an injector driver responsive to first control signals for generating first fuel injector actuation signals operative to cause a single fuel injector to inject fuel into the cylinder and for generating second fuel injector actuation signals operative to cause at least two fuel injectors to inject fuel into the cylinder. - View Dependent Claims (27, 28)
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Specification