Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Kazuhiko Hanawa

Kazuaki Takano

Mitsuru Nakamura

Satoru Kuragaki

Tatsuhiko Monji

Kazuo Matsuura

Hiroshi Kuroda

Motoyuki Abe

Satoshi Shimada

Toshiyuki Innami

Tatsuya Yoshida

Tohru Ishikawa

Noriyuki Maekawa

Takehiko Kowatari

Kazuto Nakamura

Noriharu Sato

Mikio Ueyama

Jie Bai

Yasunari Tanaka

Kenchiro Tokuo

Eiryo Ondo

A cruise control device and an obstacle detection device are provided which achieve a safe and appropriate tracking control by avoiding a sudden recognition of a short following distance when a preceding vehicle is found in an uphill or downhill gradient, in a curve, or at an intersection, or by reducing the damage of a crash when the crash cannot be avoided. An obstacle determination process section is provided which receives information from a sensor which detects an obstacle, receives terrain information of the position of the host vehicle from a navigation device, and determines the presence of the obstacle when a predetermined condition is satisfied after the sensor detects the obstacle. The predetermined condition to determine the presence of the obstacle is changed based on the terrain information of the position of the host vehicle received from the navigation device.

Vehicle control device and vehicle control method

Information storage elementand transmitter-receiverare molded in resin connector partof fuel injection valvewhich projects outside of the engine by molding. The precise control of an injection amount is enabled by using directly the characteristic of injection amount stored in information storage element, and obtaining the width of the injection command pulse corresponding to the injection amount instruction value. Thereby, the minimum injection amount which is the minimum value of the fuel supply amount which can be controlled is reduced.

Electromagnetic actuator, fuel injection valve, method of controlling fuel injection valve, and method of driving the same

In a radio wave radar system using a two-frequency CW modulation method, it is possible to detect a distance between a host vehicle and a forward vehicle and to realize a stable ACC following travel, even in a condition in which the relative speed is 0. By combining the two-frequency CW modulation method with the frequency pulse CW modulation method, that is, by using combination with the two-frequency CW method when the relative speed occurs and the frequency pulse CW method when the relative speed is close to 0, even if the relative speed is 0, the IF signal obtained from the reflected wave from the forward vehicle can be generated to detect the existence of the ACC target vehicle, so that it is possible to realize a stable ACC following travel.

Radio-wave radar system and adaptive cruise control system

The present invention provides an intelligent cruise control device installed in a host vehicle and used for performing follow-up cruise control to follow up a moving target located in front of the host vehicle by supplying an operating signal to an auto cruise control device which is used for carrying out auto cruise control to adjust the speed of the host vehicle by carrying out an operation indicated by the operating signal generated by the operating part in accordance with an operation type such as acceleration and deceleration specified by the driver so that the host vehicle is running at the adjusted speed. The intelligent cruise control device further comprises: a storage means for storing information on the operating signal for each operation type such as acceleration and deceleration; an operation determining means for determining the type of an operation required by the host vehicle to follow up a moving target located in front of the host vehicle from information on the speed of the host vehicle and information on the range between the host vehicle and the moving target; and a signal generating means for reading out information on an operating signal for the type of an operation determined by the operation determining means from the storage means and for generating the operating signal in accordance with the information on the operating signal read out from the storage means.

Intelligent cruise control device

An intelligent cruise control system is capable of maintaining a car-to-car distance allowing a collision to be avoided and carrying out follow-up running control without providing a sense of incompatibility to the driver. A radar circuit employed in a radar unit calculates a relative speed Vr of a car running ahead of a vehicle with an intelligent cruise control system installed therein with respect to the vehicle and a distance dr from the vehicle to the preceding car from a wave reflected by the preceding car. An ICC unit adjusts the speed of the vehicle by controlling the output of the engine of the vehicle in accordance with information such as the relative speed Vr and the distance dr received from the radar unit. In a follow-up running mode, the ICC unit controls the cruise of the vehicle in such a way that the speed of the vehicle and the distance from the vehicle to the preceding car are maintained at a target speed and a target car-to-car distance respectively. When the ICC unit forms a judgment that deceleration of the vehicle is not enough if only deceleration based on the engine brake is relied on, giving rise to fear of a rear-end collision of the vehicle with the preceding car, the ICC unit calculates a target deceleration and operates an automatic brake unit, letting the automatic brake unit generate a braking force appropriate for the target acceleration.

Intelligent cruise control system for moving body

In a method of adjusting the axis of a car on-board radar, especially, a car on-board mono-pulse radar having the function of transmitting radio waves, light or ultrasonic waves, a car axis and an offset axis are set and the mount angle of an antenna offset-mounted on the offset axis can be adjusted with high precision and with ease through a reduced number of process steps. In the method, at least two points are set on the car, at least two isosceles triangles having a common base defined by a line connecting the setting points and sides of different lengths are drawn, a line connecting vertexes on the same plane of the obtained isosceles triangles and an extension of that line are determined as the car axis, the radar antenna is mounted on the car at an offset position which is apart from the car axis by a constant distance in the horizontal direction, a straight line parallel to the car axis and passing through the offset position is determined as the offset axis, a reflector is disposed in a direction at a constant azimuth angle as viewed from the offset position of the antenna, and the reflector is used as a detection target of the radar to adjust the mount angle of the radar antenna such that an azimuth angle detection value of the reflector detected by the radar equals a setting value of the azimuth angle.

Car on-board radar axis adjusting method

Image processing apparatus for vehicles

Growing community of inventors

Hitachinaka, Japan

Kazuhiko Hanawa