Tire module with piezo-electric transducer and tire equipped therewith

A pneumatic tire for vehicles, on the inside of which a tire module is fastened, the tire module comprising:

• a device for measuring and/or monitoring the air pressure in the tire;
• a transmitter for transmitting radio signals, which contain information regarding the air pressure in the tire, the transmitter connected to the device;
• a mechanical-electrical transducer with a flexible, circular, disc-like piezo-electric element, which converts alternating changes in shape of the piezo-electric element caused by the rolling tire into electric energy, hereinafter described as a piezo disc, and on which an electrical voltage generated through the piezo effect is tapped off at contact points;
• and a storage unit for the electric energy, which is connected to the transducer and powering the device and transmitter;
• wherein the contact points are located on opposite sides of the piezo disc;
• the tire module being fastened to the inside of the pneumatic tire in such a way that a deformation of the inside of the pneumatic tire results in a reversible deformation of the metal disc and of the piezo disc.