Patents Examined by Paul Shik Lyen Ip
  • Patent number: 4507565
    Abstract: Described is a method of starting an electric starting motor for an internal combustion engine. The motor shaft has a pinion at the shaft end for meshing with a ring gear provided to the engine. The pinion is shifted by a shift lever into a position meshing with the ring gear, after which the starting motor is excited for causing rotation of the ring gear and thereby starting the engine. According to the invention, until the time the pinion engages the ring gear, brush means of the starting motor are shifted away from the electrically neutral axis towards pole sides of the permanent magnet of the motor where the main magnetic field produced by the magnet is strengthened by the armature-reaction magnetic fluxes. After the pinion is engaged with the ring gear, said brush means are returned again to their positions on said neutral axis.
    Type: Grant
    Filed: May 12, 1983
    Date of Patent: March 26, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Isao Hamano