Abstract: A vehicle recognition system to enable a two-wheeled vehicle without a navigation system to recognize the position of a traffic intersection and to cause itself to be noticed by other vehicles. The system includes a communication distance measurement modem which receives positional information of a traffic intersection and the current position of a four wheeled vehicle from the four-wheeled vehicle. The vehicle information interface (I/F) collects vehicle velocities, acceleration and deceleration, and mileages and provides them to an electronic control unit (ECU). A differential global positioning system (DGPS) measures the current position based on an electric wave received by a GPS antenna and correction information received by a FM antenna. The ECU determines the presence of another vehicle that the two-wheeled vehicle may intersect, and outputs visual and audio signals to the helmet worn by the driver of the two-wheel vehicle.

Abstract: The present invention provides a radio communication system in which not only a communication unit operating in a slave mode but also a communication unit operating in a master mode can be changed into a power saving mode.

Abstract: Two antennas are provided in a base station, one antenna AT1 is arranged at the root of a right handle grip [1R] and the other antenna AT2 is arranged at the root of a left handle grip [1L]. Alternatively, one antenna AT1 is arranged at the root of a front right turn signal [2R] and the other antenna AT2 is arranged at the root of a front left turn signal [2L] Alternatively, one antenna AT1 is arranged at the root of a rear right turn signal [3R] and the other antenna AT2 is arranged at the root of a rear left turn signal [3L]. Alternatively, one antenna AT1 is arranged at the front of a vehicle and the other antenna AT2 is arranged at the rear thereof.

Abstract: An automatic accident informing apparatus for a two-wheel vehicle is provided which can detect the occurrence of accident with the use of a simple arrangement. The automatic accident informing apparatus for a two-wheel vehicle includes an accident detecting module 3 for detecting an accident of the vehicle and an accident informing module 7 arranged responsive to the occurrence of the accident detected by the accident detecting module 3 for informing an external party(s) of the accident. The accident detecting module 3 includes an inclination sensor 2 for measuring the inclination angle of the vehicle and an accident judgment unit 340 for judging that the vehicle met with the accident when the inclination of the vehicle remains higher than a predetermined degree throughout a specific length of time.

Abstract: An antenna disposition structure is suitable for a motorcycle. An antenna is disposed in a front cover in such a manner as to be disposed over a headlamp and forwardly from a virtual slant line connecting the center of a handlebar to an axle of a front wheel. A driver, who functions as a radio wave absorbing body, acts to weaken radio waves. However, since the antenna is disposed forwardly from the slant line, it is possible to prevent the effect of absorption of radio waves by a driver and to prevent reductions in electromagnetic fields in the vertical and horizontal directions.

Abstract: An automatic accident informing apparatus for a two-wheel vehicle is provided which can detect the occurrence of accident with the use of a simple arrangement. The automatic accident informing apparatus for a two-wheel vehicle includes an accident detecting module 3 for detecting an accident of the vehicle and an accident informing module 7 arranged responsive to the occurrence of the accident detected by the accident detecting module 3 for informing an external party(s) of the accident. The accident detecting module 3 includes an inclination sensor 2 for measuring the inclination angle of the vehicle and an accident judgment unit 340 for judging that the vehicle met with the accident when the inclination of the vehicle remains higher than a predetermined degree throughout a specific length of time.

Abstract: A head-up display is provided which is suitable for a motorcycle. An image is present in peripheral fields outside a 90% center field. In the case where the image is located outside the 90% center field, it does not obstruct driving of the vehicle, and in the case where the image is located in the peripheral fields, it allows a driver to dimly see the shape of the image and thereby recognize the presence of the image. For this reason, the image is located in the peripheral fields. Since an image is located in a peripheral field, the presence of the image can be recognized by a driver while not obstructing a desirable visibility to the front side of the driver. The driver can recognize, on the basis of the presence or absence of the image, whether or not attention should be taken to drive the vehicle.

Abstract: A movable body detecting device and a road-curve mirror with a radio wave reflection plate for allowing a reception side movable body present at a position where the movable body is hidden from a transmission side movable body to accurately receive movable body detecting radio waves transmitted from the transmission side movable body by making use of a road-curve mirror. A radio wave reflection plate for reflecting radio waves, being transmitted from one movable body A and received by another movable body B so that the reception side movable body detects the presence of the transmission side movable body, is mounted in a road-curve mirror provided on such a road to assist an individual in navigating an intersection.

Abstract: An antenna disposition structure is suitable for a motorcycle. An antenna is disposed in a front cover in such a manner as to be disposed over a headlamp and forwardly from a virtual slant line connecting the center of a handlebar to an axle of a front wheel. A driver, who functions as a radio wave absorbing body, acts to weaken radio waves. However, since the antenna is disposed forwardly from the slant line, it is possible to prevent the effect of absorption of radio waves by a driver and to prevent reductions in electromagnetic fields in the vertical and horizontal directions.

Abstract: A movable body detecting device and a road-curve mirror with a radio wave reflection plate for allowing a reception side movable body present at a position where the movable body is hidden from a transmission side movable body to accurately receive movable body detecting radio waves transmitted from the transmission side movable body by making use of a road-curve mirror. A radio wave reflection plate for reflecting radio waves, being transmitted from one movable body A and received by another movable body B so that the reception side movable body detects the presence of the transmission side movable body, is mounted in a road-curve mirror provided on such a road to assist an individual in navigating an intersection.

Abstract: A movable body detecting device and a road-curve mirror with a radio wave reflection plate for allowing a reception side movable body present at a position where the movable body is hidden from a transmission side movable body to accurately receive movable body detecting radio waves transmitted from the transmission side movable body by making use of a road-curve mirror. A radio wave reflection plate for reflecting radio waves, being transmitted from one movable body A and received by another movable body B so that the reception side movable body detects the presence of the transmission side movable body, is mounted in a road-curve mirror provided on such a road to assist an individual in navigating an intersection.

Abstract: A moving body detection system for detecting moving bodies by transmitting and receiving signals between the moving bodies. Each moving body transmits an ID code capable of identifying the moving body itself. A detection side moving body receives the ID code signal based on changes in driving conditions, discriminates the received ID signal, and transmits a detection signal with the ID code and the ID code of the detection side moving body itself added thereto. A non-detection side moving body receives the detection signal, and transmits a response signal with its own ID code and the ID code of the detection side moving body added if the ID code added to the detection signal is the same as its own ID code. Furthermore, the detection side moving body receives the response signal and measures the distance to the non-detection side moving body having the same ID code as the response signal.

Abstract: A method and device are provided for adjusting the height of a motorcycle equipped with a motorcycle-height changing device for increasing and decreasing the height of the motorcycle in accordance with the operation of an actuator controlled in accordance with information on the speed of the motorcycle. Thus, an operational delay can be prevented from occurring when stopping the motorcycle by an abrupt deceleration. In addition, the height of the motorcycle can be increased to a high value quickly even at the time the motorcycle is started. A first piece of set speed information is set for starting the operation of the actuator to decrease the height of the motorcycle, and a second piece of set speed information different from the first set speed information is set for starting the operation of the actuator to increase the height of the motorcycle.

Abstract: A fuel injection controlling device for a two-cycle engine includes an electronic fuel injection system having a fuel injection quantity determining device for determining a fuel injection amount in response to rotational speed and throttle opening of the engine. At engine start, the controlling device, in response to operation of an engine kick starter, sequentially decreases starting fuel amount as the number of actuations of the kick starter increases. Fuel injection amount is also decreased in response to increasing engine temperature.

Abstract: A fuel injection controlling device for a two-cycle engine includes an electronic fuel injection system having a fuel injection quantity determining device for determining a fuel injection amount in response to a rotational speed of said engine and a throttle opening. A misfire detecting device is provided for detecting a misfire condition of said engine. Further, a device is provided for decreasing the amount of fuel injection upon transition from a misfire condition to a fired condition. The misfire detecting device includes a sensor for detecting an internal pressure of an intake air path, a storage device for storing therein an output value of the sensor and data of an intake air path internal pressure in a predetermined operating condition of the engine upon normal combustion, and a comparison device for comparing the output value with data read out from the storage means to detect a difference in pressure.

Abstract: A piston head for an internal combustion engine is provided containing a polished nickel plated layer formed in the piston top and an anodized layer formed on at least the lower part of the uppermost piston ring groove in order to reduce the adverse affects of excessive thermal conditions on the member.