Komatsu Corporation

Kabushiki Kaisha Komatsu Seisakusho

Tsugio Sudo

Takao Nagai

Kozo Miyake

Method and apparatus for preparing running course data for an unmanned

Apparatus and method for fleet control when unmanned and manned vehicles

A collision preventing system for a vehicle has a brake system. The system includes first preview sensor detecting an obstacle in front of the vehicle in a first distal detection zone to produce a first signal indicative of presence of the obstacle and distance between the obstacle and the front end of the vehicle, and a second preview sensor detecting the obstacle in front of the vehicle in a second proximal detection zone to produce a second signal indicative of at least presence of the obstacle. The system further includes third vehicle speed sensor detecting vehicular traveling speed and generating a vehicle speed indicative signal. A control unit is connected to the first and second preview sensor for receiving the first and second signals. The control unit is responsive to the first signal for deriving vehicular deceleration pattern for stopping the vehicle without colliding on the obstacle on the basis of the distance between the obstacle and the front end of the vehicle and the vehicle speed indicated by the vehicle speed indicative signal, and responsive to the second signal for operating the brake system for instant stop of the vehicle.

System for preventing collision for vehicle

A steering circuit system for a moving vehicle in which automatic steering operation as well as manual steering operation can be achieved. Pressurized oil discharged from a hydraulic pump (1) is fed to a steering line (3) and to an auxiliary steering line (10). The pressurized oil of the steering line (3) is fed to an expanding chamber (9a, 90a) and to a contracting chamber (9b, 90b) of a pair of steering cylinders (9, 90) by manual operation steering valve (5). The auxiliary steering line (10) is connected to a third line (12) through a switching valve (11). The third line (12) is connected to a fourth line and to a fifth line (14, 15) through an automatic operation steering valve (13). The fourth line (14) is connected to contracting chamber (9b) and to expanding chamber (90a) of the left and right steering cylinders (9, 90). The fifth line (15) is connected to contracting chamber (90b ) and expanding chamber (9a) of the left and right steering cylinders (9, 90). First and second pilot operation check valves (16, 17) are provided in the fourth and the fifth lines (14, 15), respectively. The first pilot operation check valve is opened in response to pressure in the fifth line (15), and the second pilot operation valve is opened in response to pressure in the fourth line (14).

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Tokyo, Japan

Tsugio Sudo