Method of generating pressure pulses, a pressure pulse generator and a piston engine provided therewith

A method of generating pressure pulses through a pressure pulse transmitting body (3) that is displaceably arranged in a chamber (2), by which the flow of pressure fluid into and out of said chamber (2) is controlled electromechanically for the purpose of accomplishing pressure changes for the displacement of the body of a pressure pulse generator that comprises:

• said chamber (2), divided by said body (3) into a first and a second part (4,5),—a first spring and a second spring (16,17), arranged to displace said body (3) in a first direction and a second direction respectively in said chamber,
• a first conduit (11) leading between a high pressure source (9) and a first part (4) of the chamber (2),
• wherein the pressure fluid in the first part (4) of the chamber acts on said body (3) for displacing the latter in the second direction, and
• means (13,14) for opening/interrupting a communication between the first part (4) of the chamber (2) and the high pressure source through the first conduit (11), characterized in that—the communication between the first part (4) of the chamber (2) and the high pressure source (9) is kept interrupted during a displacement of the body (3) from a predetermined starting position in the first direction by means of a triggering of the first spring (16),
• and that the communication between the first part (4) of the chamber (2) and the high pressure source (9) is kept open while the body (3) is displaced back in the second displacement direction to said starting position, whereby a biasing of the first spring (16) is accomplished.