Hydrogen combustion engine torque control
AssigneeDAF Trucks N.V.
InventorDirk-jan De Jong
Life of this patent
Estimating the term…
Abstract
A hydrogen combustion engine comprises a hydrogen fuel supply, an air supply, a fuel ignition device, a combustion chamber for converting the ignited hydrogen fuel to work, an exhaust for exhausting the exhaust gases from the combustion chamber, a turbo compressor for converting the remaining exhaust pressure to increased inlet pressure of the air supply and an engine controller, wherein the engine controller is arranged to vary the ignition timing of the ignition device from an early ignition timing in full engine load condition, to a delayed ignition timing in a low engine load condition of the hydrogen combustion engine to keep the exhaust pressure at an elevated level, irrespective of low or high engine load condition.
Claims8
A method for defining cylinder torque demand during transitions in skip-fire engine operation of a combustion engine having a number N of cylinders, the method comprising:
- firing the engine in first cycles of a first pattern of N events, that defines for each cylinder of the engine a fire or skip fire event, with a first fuel quantity for each fire event in the first cycle;
- transitioning the engine to firing the engine in second cycles of a second pattern of N events of fire and skip fire events for each cylinder, with a second fuel quantity for each fire event in the second cycle;
- and
- carrying out one or more transitioning fire events, in transitioning from the first to the second pattern, with a dynamic fuel quantity, to compensate for torque loss of a preceding or succeeding skip fire event of said fire event, wherein the adjustment differs from the first and/or second fuel quantity.
Dependencies are inferred from the claim text.