Methods and systems are provided for a fuel system. In one example, a method may include adjusting operation of a fuel-operated heater (FOH) in response to a condition of a canister. The FOH is activated and configured to flow heated air to the canister to promote desorption of fuel vapors stored therein.

Systems and methods for heating a vehicle via a fuel operated heater are presented. In one example, the fuel operated heater heats a catalyst in an exhaust system of an internal combustion engine to reduce engine emissions. In another example, the fuel operated heater heats a particulate filter to purge soot from the particulate filter.

A system and method for configuring parameters for a variable gaseous appliance, comprise a sensor for detecting a composition of the gaseous fuel in a fuel tank. A first set of instructions are executable on a processor for receiving a signal from the sensor and analyzing the gaseous fuel based on the Wobbe Index, methane index, and inert gas percentage, to produce a gaseous fuel analysis. A second set of instructions are executable on the processor for producing a signal for configuring parameters of the engine for running the engine based on the gaseous fuel analysis.

A heating system, more particularly for heating a motor vehicle, including a fuel-operated heating device and a sensing unit, which is configured to sense the presence of fuel in the heating device at least for a first case in which there is no flame formation, more particularly both for the first case in which there is no flame formation and for a second case in which there is flame formation.

Methods and systems are provided for a fuel system. In one example, a method may include adjusting operation of a fuel-operated heater (FOH) in response to a condition of a canister. The FOH is activated and configured to flow heated air to the canister to promote desorption of fuel vapors stored therein.

A heating system, more particularly for heating a motor vehicle, including a fuel-operated heating device and a sensing unit, which is configured to sense the presence of fuel in the heating device at least for a first case in which there is no flame formation, more particularly both for the first case in which there is no flame formation and for a second case in which there is flame formation.