Control of aerosol production in an aerosol-generating system

A method of controlling aerosol production in an aerosol-generating system,

• the aerosol-generating system comprising:
• an aerosol-generating element,
• a housing having an air inlet and an air outlet, a flow channel being defined through the housing from the air inlet to the air outlet, the flow channel being configured to provide a flow of air past the aerosol-generating element when a user puffs on the system, and
• a flow sensor configured to detect an air flow in the flow channel indicative of the user taking a puff;
• and
• the method comprising the following chronological steps:
• increasing a power supplied to the aerosol-generating element from a power P0 to at least a power P1 when the flow sensor detects that a flow rate of the air flow is greater than a first threshold,
• decreasing the power supplied to the aerosol-generating element to a power P2, which is less than the power P1, when the flow sensor detects that the flow rate of the air flow is less than a second threshold, the second threshold being, or being indicative of, a flow rate that is a predetermined first proportion of a first maximum flow rate sensed by the flow sensor, and
• increasing the power supplied to the aerosol-generating element if the flow sensor detects that the flow rate of the air flow is greater than a third threshold, which is greater than the second threshold, before detecting that the flow rate of the air flow is less than an end of puff threshold, the end of puff threshold being less than the second threshold.