Systems and methods for cylinder-side fuel switching

Abstract

This document describes an internal combustion engine system (100). The systems described herein allow switching from methanol to diesel as the primary fuel (212) at the cylinder, rather than at the system itself. A valve at the inlet of a primary return tank (112) is used to isolate the primary return tank (112) for the primary fuel (212). A primary fuel pump (120) is de-energized, allowing an inlet valve to open. Pilot-ignition fuel (210) is then fed into both a primary fuel inlet line (124) and a pilot-ignition fuel inlet line (116) into the injector (102).