Split-cycle, reactivity controlled compression ignition engine and method

摘要

An internal combustion engine includes a first cylinder having an intake valve in fluid communication with an intake manifold, and a second cylinder having an exhaust valve in fluid communication with an exhaust manifold. A transfer passage fluidly connects the first cylinder with the second cylinder. A first fuel injector is configured to provide a first fuel to the first cylinder, and a second fuel injector is configured to provide a second fuel to the second cylinder. The first cylinder operates, at times, to push a first air/fuel mixture through the transfer passage into the second cylinder. The second fuel injector is configured to provide at least one fuel injection plume into the first air/fuel mixture.

主权项

1. An internal combustion engine, comprising:
a first cylinder having an intake valve in fluid communication with an intake manifold; a second cylinder having an exhaust valve in fluid communication with an exhaust manifold; a transfer passage fluidly connecting the first cylinder with the second cylinder; a first fuel injector configured to provide a first fuel directly to the first cylinder; a second fuel injector disposed in the transfer passage and configured to provide a second fuel to the second cylinder via the transfer passage; wherein the first cylinder operates to push a substantially homogeneous mixture of air and first fuel through the transfer passage into the second cylinder, wherein the second fuel injector is configured to provide a first fuel injection plume of second fuel into the second cylinder, wherein the second fuel injector is configured to provide a second fuel injection plume of second fuel into the second cylinder, and wherein the second fuel injector injects the first and second fuel injection plumes separately into the substantially homogeneous mixture of air and first fuel as said mixture is passing through the transfer passage from the first cylinder to the second cylinder, such that a stratified mixture is formed in the second cylinder that includes first, second and third regions of different reactivities, the first region including a mixture of air and the first fuel, the second region containing a mixture of air, the first fuel and the second fuel and being disposed around a peripheral portion of the at least one cylinder, and the third region containing a mixture of air, the first fuel and the second fuel and being disposed around a central portion of the at least one cylinder.