Capteur accélérométrique pour mesure du cliquetis d'un moteur à combustion interne

• Main Author: GENOT BERNARD, PIERRE, ANDRE
• Format: Patent
• Language: French
• Published: 01.03.1996
• Edition: 6
• Subjects: INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

PCT No. PCT/EP95/00314 Sec. 371 Date Aug. 1, 1996 Sec. 102(e) Date Aug. 1, 1996 PCT Filed Jan. 30, 1995 PCT Pub. No. WO95/21384 PCT Pub. Date Aug. 10, 1995An accelerometric sensor for measuring pinking in an internal combustion engine. The sensor includes a base in the form of a sleeve with a flange extending therefrom and supporting at least one stacked piezoelectric ring, connecting disks and a seismic weight. The underside of the base is used as a contact surface between the sensor and the part to be measured. The underside has a central recess such that the average load distribution diameter over the contract surface is no smaller than the average of the shoulder. This shape may be achieved with a recess which is coaxial with the sleeve and which has a diameter greater than the external diameter thereof. The shape may alternatively be achieved by forming the underside in a concave shape.