Nissan Motor Company Limited

Hideo Obara

Takayuki Yanagishima

Haruhiko Iizuka

Yasutoshi Seko

Hideyuki Nagashima

Akira Kimitsuka

Akira Kimituka

In order to provide a seat control which can automatically move a drivers seat and ancillary equipment (e.g. steering wheel) from a set of preselected driving positions to a retracted status in the least disconcerting manner, one of operations (e.g. the steering column tilting operation) is used as a standard for terminating the movement of all of the other movements toward given retracted positions upon the selected operation finishing. Even though the movement of the seat toward its most rearward position may not have been fully completed, the upward tilting of the steering column (viz., the movement incurred with the selected operation) in combination with what rearward movement of the seat has been possible during the tilting, opens up a space sufficient for the driver to easily ingress and egress and positively ensures that all of the various movements terminate simultaneously.

Control system for vehicle equipment

A system which automatically moves a drivers seat between one of a plurality of preselected driving positions and a position wherein ingress and egress is facilitated is inhibited when a passenger is seated on the seat behind the drivers one.

A memory contains data which permits a vehicle seat to be moved between any one of a plurality of preferred driving positions and a position in which ingress and egress is facilitated. A seat belt retractor is operated in conjunction with the seat servo so as to control the tension in the seat belt as the seat is moved from the ingress/egress position to a selected one of the preferred driving positions so as to avoid any discomfort to the belt wearer.

A drowsiness alarm system and method for use in automotive vehicles is set to a stand-by state in response to a specific sequence of steering wheel maneuvers which may reflect driver drowsiness, for example, a relatively long period during which the steering wheel is not turned followed by an abrupt steering adjustment. From the standby state, an alarm or display alerting the driver will be generated in response to another sequence of steering maneuver confirming driver drowsiness. The second sequence of maneuvers may be selected from among a number of conventional steering behavior criteria. If driver drowsiness is not confirmed within a predetermined period of time after initiation of the stand-by state, the system is reset to its initial state.

Alarm system and method for sensing a stand-by state in a driver

A system and method for detecting driver drowsiness in an automotive vehicle employs means for detecting changes in steering direction of a steering wheel on the basis of steering pulses, each steering pulse being produced whenever the steering wheel is rotated through a predetermined angle, and determines that the vehicle driver is drowsy when the number of steering pulses within a fixed interval of time exceeds a first reference value and the number of steering reversals within the fixed interval of time is below a second preset reference value.

System and method for detecting driver drowsiness including detection of

A fatigue alarm system and method for an automotive vehicle driver is adapted to measure periods of time during which the vehicle is driven and to subtract therefrom periods of time during which the driver rests. The driver rest periods are distinguished from brief stops of the vehicle in order to accurately measure the adjusted period of driving time. In order to distinguish rest periods from brief traffic stops, the duration of vehicle stops are measured and compared with a given value. When the vehicle stop periods are shorter than the given value, the vehicle is judged to be stopped briefly, i.e. that the driver is not resting, and the measured driving period is incremented by the measured vehicle stop period. On the other hand, when the stop periods are longer than the given value, the driver is judged to be resting. In this case, the measured stop time is subtracted from the measured driving time after being adjusted by a suitable proportionality factor. The result of measurement is visually displayed by means of a plurality of fatigue level indicator segments. The threshold levels at which each indicator segment is activated or deactivated in adjusted in accordance with its current activation state in order to avoid hunting thereof.

Method and system for detecting driver fatigue including differentiation

A drowsiness alarm system for a vehicle detects and signals that the vehicle driver is drowsy on the basis of the duration during which no steering adjustments are made and the magnitude and speed of abrupt steering adjustments immediately following the non-steering period. Parameters compared to the magnitude and speed of the abrupt steering adjustments in order to recognize steering behavior reflecting drowsiness are adjusted in accordance with the duration of the non-steering period.

Method and system for detection of driver drowsiness by an abrupt

A system and method for detecting driver drowsiness on the basis of steering pulses, each steering pulse being produced whenever a steering wheel is rotated through a predetermined angle and indicating the direction of rotation of the steering wheel, comprising means for detecting the roughness of the road surface on which the vehicle is travelling and interrupting the detection of driver drowsiness for a fixed interval of time when the road surface roughness exceeds an acceptable level, i.e. a level conductive to accurate drowsiness detection.

Growing community of inventors

Yokosuka, Japan

Hideo Obara