Abstract: An engine start abnormality diagnosis apparatus determines a cause of a long cranking abnormality in which, when an engine including cylinders is started, start of the engine is not completed even if a cranking period is equal to or greater than a predetermined time. The engine start abnormality diagnosis apparatus includes a rotation speed detector and an abnormality diagnosis processor. The rotation speed detector detects a rotation speed of a crankshaft of the engine when at least one of the cylinders is in a latter stage of a compression stroke. The abnormality diagnosis processor determines that the cause of the long cranking abnormality is an electric system abnormality when the rotation speed is less than a predetermined threshold, and determines that the cause of the long cranking abnormality is a combustion abnormality when the rotation speed is equal to or greater than the threshold.

Abstract: A ring laser gyro with no piezoelectric elements for dither detection includes a laser beam receiving unit for receiving a laser beam taken out of a gyro block, a laser beam intensity measuring unit for measuring the intensity of the laser beam received by the laser beam receiving unit, a dither mechanism, a dither control unit for driving the dither mechanism, and a gyro case housing the gyro block, wherein the laser beam receiving unit is secured to the gyro case, the laser beam receiving unit has a laser beam receiving surface for receiving the laser beam from the gyro block to detect a laser beam receiving position on the laser beam receiving surface and output positional information indicating the laser beam receiving position. The dither control unit drives the dither mechanism on the basis of information indicating the amplitude of the laser beam receiving position obtained from the positional information.

Abstract: A ring laser gyro with no piezoelectric elements for dither detection includes a laser beam receiving unit for receiving a laser beam taken out of a gyro block, a laser beam intensity measuring unit for measuring the intensity of the laser beam received by the laser beam receiving unit, a dither mechanism, a dither control unit for driving the dither mechanism, and a gyro case housing the gyro block, wherein the laser beam receiving unit is secured to the gyro case, the laser beam receiving unit has a laser beam receiving surface for receiving the laser beam from the gyro block to detect a laser beam receiving position on the laser beam receiving surface and output positional information indicating the laser beam receiving position. The dither control unit drives the dither mechanism on the basis of information indicating the amplitude of the laser beam receiving position obtained from the positional information.

Abstract: An air bag apparatus comprises a driver seat air bag unit, a passenger seat air bag unit, a driver position detector, a front passenger position detector, and a control unit. The driver seat air bag unit is disposed ahead of a driver seat and has a driver seat air bag unfolded in a two-stage manner. The passenger seat air bag unit is disposed ahead of a front passenger seat and has a passenger seat air bag unfolded in a two-stage manner. The control unit controls second unfolding initiations of the air bags respectively according to the sitting positions. Accordingly, the second stage unfolding of the air bags are initiated at optimal times in accordance with the sitting positions of the driver and the front passenger. As a result, secure restraint of the driver and the front passenger effected by the air bags and reduction in pressure acting on the driver and the front passenger from the air bags are achieved simultaneously on both driver seat and front passenger seat.

Abstract: An occupant restraint device includes a container having an opening, a lid covering the opening of the container, and an inflatable occupant restraint cushion within the container. The cushion has a cushion portion adjacent the lid. The lid includes a first portion arranged to be first contacted by the inflatable occupant restraint cushion when it inflates and a second portion adjacent to the first portion. The first and second portions are perforated to provide different rupturabilities such that the first portion provides the greatest rupturability.