Method for metered dispensing of lubricant

A method of metering a lubricant with a lubricant dispenser having

• a reservoir filled with the lubricant,
• a gas generator for electrochemically producing gas,
• a piston acted upon by the generated gas so as to discharge the lubricant from the reservoir, and
• an electronic controller to control the electrochemical generation of gas,
• the method comprising the steps of:
• a) calculating for a predetermined desired dispensing time a base gas-generation rate that, once the dispenser is started, will empty the reservoir when or after the dispensing time elapses;
• b) recording after starting of the dispenser at a plurality of separate times during a time period of predetermined length a temperature of the lubricant or of the environment and calculating from the temperatures recorded during the time period a mean temperature for the time period;
• c) determining from the calculated mean temperature and stored correction values that represent the temperature dependence of the electrochemical gas generation rate a gas-generation control parameter;
• and
• d) adjusting the base gas generation rate of the dispenser in accordance with the control parameter.