CRANK ANGLE DETECTOR

• Main Authors: KAWAJIRI HIROKI, HAMAI KYUGO
• Format: Patent
• Language: English
• Published: 09.06.1986
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MECHANICAL ENGINEERING; PHYSICS; TARIFF METERING APPARATUS; 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

PURPOSE:To lower the detection cost, by providing a rotor in which numerous teeth for generating crank angle signals teeth are formed on the circumference thereof with those specified used for generation of a reference position signal having a magnetized body buried thereinto and a a pickup at the position facing it. CONSTITUTION:A crank angle detector 1 is made up of an existing part of the engine body as a rotor, a ring gear 2 and a magnet pickup 3 arranged facing the circumferential surface thereof 2. Numerous teeth 2a are formed on the circumference of the gear 2 to serve for generating crank angle signals as they are while those specified are used for generation of a reference position signal by burying thereinto a magnetized body 5 covered with a magnetic shield material 4 on the perimeter thereof except for the circumferential surface. Then, the detection signal Sa from the pickup 3 of the crank angle detector 1 enters a control circuit 10 to control the ignition timing or the like. with such an arrangement, the use of only one rotor and one pickup enables the generation of a reference position signal and crank angle signals while allowing the common use of parts thereby lowering the cost with a reduced number of parts.