Waveform for metering fuel into a fuel injector
AssigneeCaterpillar Inc.
InventorsBrian V. Tranel, Dustin K. Fee, Kaushik K. Krishnamurthy, Andrew O. Marrack
Life of this patent
Estimating the term…
Abstract
A multi-fuel injection system and method for generating combustion signals and metering signals for fuel injectors are provided. A first fuel and a second fuel may be received. A combustion signal may be generated to cause a fuel injector to perform fuel injection to inject at least one of the first fuel or the second fuel into a cylinder of an engine. A metering signal may be generated to cause the fuel injector to perform fuel metering to introduce the second fuel into a nozzle of the fuel injector while the fuel injector is not injecting either of the first fuel or the second fuel into the cylinder of the engine.
Claims20
A method comprising:
- receiving, by a multi-fuel injection system, a first fuel;
- receiving, by the multi-fuel injection system, a second fuel;
- generating, by the multi-fuel injection system, a combustion signal to cause a fuel injector to perform fuel injection to inject at least one of the first fuel or the second fuel into a cylinder of an engine;
- and
- generating, by the multi-fuel injection system, a metering signal to cause the fuel injector to perform fuel metering to introduce the second fuel into a nozzle of the fuel injector while the fuel injector is not injecting either of the first fuel or the second fuel into the cylinder of the engine,
- wherein the combustion signal includes a combustion waveform including at least one of a combustion keep-in section or a combustion hold-in section,
- wherein the metering signal includes a metering waveform including at least one of a metering keep-in section or a metering hold-in section, and
- wherein a duration of the metering keep-in section is different than a duration of the combustion keep-in section or an amplitude of the metering hold-in section is different than an amplitude of the combustion hold-in section.
An electronic control module (ECM) comprising:
- a memory configured to store instructions;
- and
- one or more processors configured to execute the instructions to:
- generate a combustion signal to cause a fuel injector to perform fuel injection to inject at least one of a first fuel or a second fuel into a cylinder of an engine;
- and
- generate a metering signal to cause the fuel injector to perform fuel metering to introduce the second fuel into a nozzle of the fuel injector while the fuel injector is not injecting either of the first fuel or the second fuel into the cylinder of the engine,
- wherein the combustion signal includes a combustion waveform including at least one of a combustion keep-in section or a combustion hold-in section,
- wherein the metering signal includes a metering waveform including at least one of a metering keep-in section or a metering hold-in section, and
- wherein a duration of the metering keep-in section is different than a duration of the combustion keep-in section or an amplitude of the metering hold-in section is different than an amplitude of the combustion hold-in section.
A system comprising:
- a fuel injector configured to perform fuel injection and fuel metering;
- and
- an electronic control module (ECM) configured to:
- generate a combustion signal to cause the fuel injector to perform the fuel injection to inject at least one of a first fuel or a second fuel into a cylinder of an engine;
- and
- generate a metering signal to cause the fuel injector to perform the fuel metering to introduce the second fuel into a nozzle of the fuel injector while the fuel injector is not injecting either of the first fuel or the second fuel into the cylinder of the engine,
- wherein the combustion signal includes a combustion waveform including at least one of a combustion keep-in section or a combustion hold-in section,
- wherein the metering signal includes a metering waveform including at least one of a metering keep-in section or a metering hold-in section, and
- wherein a duration of the metering keep-in section is different than a duration of the combustion keep-in section or an amplitude of the metering hold-in section is different than an amplitude of the combustion hold-in section.
Dependencies are inferred from the claim text.