INSTRUMENT FOR MEASURING ENGINE ROTATION PERIOD

• Main Authors: KATSUKI KENICHI, TANAKA KAMEHITO, SHIBATA YUKIHIRO, ENDO KIYOMI
• Format: Patent
• Language: English
• Published: 06.07.2006
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; LIGHTING; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; MECHANICAL ENGINEERING; PHYSICS; TESTING; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; WEAPONS

PROBLEM TO BE SOLVED: To measure a rotation period of an engine by simple work. SOLUTION: A signal detected by a probe 40 attached to a grounding side of an electric power source connected to an igniter for igniting the engine is input into an F-V conversion circuit 58 through an amplifying circuit 52, a filter circuit 54 and a detection circuit 56. The F-V conversion circuit 58 outputs a voltage in response to a frequency band of the output signal from the detection circuit 56, and determines a pulse width of a noise masking signal from a timer circuit 60. An input control circuit 62 masks a noise signal from the output signal of the detection circuit 56, using the noise masking signal output from the timer circuit 60. A signal of the engine rotation period 66 is output based on a signal of the restrained noise signal. COPYRIGHT: (C)2006,JPO&NCIPI