Patent ID: 9038606
Filing Date: 2015-05-26
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A dual fuel engine system, comprising: a sensor configured to determine at least one operating parameter associated with a dual fuel engine of the system; a first controller in communication with the sensor, the first controller configured to determine a diesel injection pulse indicative of a first amount of diesel fuel to be injected into a combustion chamber of the engine and a first timing at which the first amount of diesel fuel is to be injected, wherein the diesel injection pulse is determined based on the at least one operating parameter and wherein fuel injection in accordance with the diesel injection pulse would result in a first combustion characteristic within the combustion chamber sufficient to satisfy an output demanded of the engine using solely diesel fuel; and a second controller in communication with the first controller so as to receive information from the first controller without inhibiting operation of the first controller, the second controller configured to determine a combined injection pulse based on the diesel injection pulse, wherein the combined injection pulse is indicative of a second amount of diesel fuel to be injected different than the first amount, a second timing at which the second amount of diesel fuel is to be injected different than the first timing, a third amount of natural gas to be injected, and a third timing at which the third amount of natural gas is to be injected; an injection system in communication with the second controller and fluidly connected to the combustion chamber, the injection system being configured to inject the second amount of diesel fuel and the third amount of natural gas into the combustion chamber in accordance with the combined injection pulse, wherein the injection in accordance with the combined injection pulse results in a combustion event characterized by a second combustion characteristic substantially equal to the first combustion characteristic, and wherein the diesel injection pulse determined by the first controller is unaffected by the second amount, the second timing, the third amount, and the third timing.