US 11,719,154 B2
Methods and systems for multi-fuel engine startup
Adam Edgar Klingbeil, Ballston Lake, NY (US); Thomas Michael Lavertu, Ballston Lake, NY (US); and Eric Dillen, Edinboro, PA (US)
Assigned to Transportation IP Holdings, LLC, Norwalk, CT (US)
Filed by Transportation IP Holdings, LLC, Norwalk, CT (US)
Filed on Nov. 17, 2021, as Appl. No. 17/455,397.
Prior Publication US 2023/0151764 A1, May 18, 2023
Int. Cl. F02B 69/04 (2006.01)
CPC F02B 69/04 (2013.01) [F02B 2201/064 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An engine system for a vehicle, comprising:
an engine configured to combust more than one type of fuel;
an alternator/generator mechanically coupled to the engine;
a first fuel storage reservoir coupled to the engine and configured to deliver a first fuel to the engine for combustion;
a second fuel storage reservoir coupled to the engine and configured to deliver a second fuel to the engine for combustion; and
a controller configured with executable instructions stored on non-transitory memory that, when executed, cause the controller to;
crank the engine using the alternator/generator in response to detection of a cold start request and initiate fuel injection via fuel injectors with a first ratio of the first fuel to the second fuel when an engine speed reaches an engine speed threshold;
adjust the fuel injection to a second ratio of the first fuel to the second fuel when the engine speed reaches an idling speed, the second ratio lower than the first ratio; and
adjust the fuel injection to a third ratio of the first fuel to the second fuel when operation of the engine at part-load is requested, the third ratio higher than the second ratio and lower than the first ratio.