Nippondenso Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Hiroshi Fujinami

Kenzo Ito

Masaki Yamamoto

Kazunori Takanabe

Yoshihisa Nomura

Hiromi Otsuki

Hiroyuki Oka

Shinichi Hori

Ryoichi Matsuura

Naohiko Tsuru

An electronic map display system for use on a vehicle comprises a display unit for displaying one of a map or a menu of the names of a plurality of particular regions, a map data storage medium for storing map data on the particular regions and name information on the particular regions, a manual controller having a name retrieval key, a setting key, and cursor keys, and an electronic control unit for controlling the display on the display unit in response to instructions from the manual controller. Upon reception of an instruction produced by the name retrieval key of the manual controller, the electronic control unit reads the name information on the particular regions from the map data storage medium, displays the region names as the menu on the display unit, and selects one of the displayed region names through operation of the cursor keys. When the setting key is depressed, the electronic control unit reads map data related to the region name on the cursor position from the map data storage medium, and displays the map of the selected particular region on the display unit.

Electronic map display system for use on vehicle

An electronic map display system for use on a vehicle comprises a display unit for displaying one of a map or a menu of the names of a plurality of particular regions, a map data storage medium for storing map data on the particular regions and name information on the particular regions, a manual controller having a name retrieval key, a setting key, and cursor keys, and an electronic control unit for controlling the display on the display unit in response to instructions from the manual controller. Upon reception of an instruction produced by the name retrieval key of the manual controller, the electronic control unit reads the name information on the particular regions from the map data storage medium, displays the region names as the menu on the display unit, and selects one of the display region names through operation of the cursor keys. When the setting key is depressed, the electronic control unit reads map data related to the region name on the cursor position from the map data storage medium, and displays the map of the selected particular region on the display unit.

A hydraulic pressure control device in a vehicle anti-skid braking system includes a brake master cylinder, a wheel brake actuating cylinder for braking a wheel in response to a fluid pressure from the brake master cylinder, a directional control valve actuatable in response to a signal from a control unit which detects a wheel condition such as wheel skidding, and a pressure control valve for disconnecting the brake master cylinder from a fluid pressure supply passage when a fluid pressure is supplied from the wheel brake actuating cylinder into a fluid pressure return passage connected to the pressure control valve when the directional control valve is actuated.

Hydraulic pressure control device for use in vehicle anti-skid braking

A vehicle map display system includes a control unit to manually or automatically display a reduced or enlarged map, from a reduced or enlarged map data storage device in accordance with the separating distance between the present position of a vehicle and a destination, on the whole or part of a display area of a display device which is provided with a sub-display area.

Map display system

In a travel guidance system for vehicles, a map data storage medium preliminarily stores administrative division name data and/or landmark data, and a control unit has the function of retrieving the name of an administrative division to which the present position of a vehicle belongs and/or a landmark in the vicinity of the present position in accordance with present position data and displaying the retrieved administrative division name and/or the retrieved landmark on a display.

Travel guidance system for vehicles

A hydraulic pressure control device in a vehicle anti-skid braking system includes a wheel brake actuating cylinder for braking a vehicle wheel, a fluid pressure supply passage connected between a master cylinder and the wheel brake actuating cylinder and having a restriction, and a first directional control valve disposed in the fluid pressure supply passage and having at least pressure-increasing and pressure-decreasing modes, the first directional control valve being normally in the pressure-increasing mode to connect the master cylinder to the fluid pressure supply passage. A second directional control valve is connected between the master cylinder and the wheel brake actuating cylinder, the second directional control valve being normally open to provide a bypass passage across the first directional control valve to connect the master cylinder passage to the wheel brake actuating cylinder. A control unit is responsive to a decelerating condition of the vehicle wheel for actuating the first directional control valve into the pressure-decreasing mode and for actuating the second directional control valve to shut off the bypass passage.

In an anti-skid braking apparatus for vehicles of the type having a fluid-pressure control valve arranged between a master cylinder and a wheel cylinder for controlling the brake fluid pressure within the wheel cylinder, when it is detected that the vehicle stops, the fluid-pressure control valve is controlled so as to assume a pressure-maintaining mode and a pressure-increasing mode alternately for a predetermined period of time as long as the brake pedal is continuously depressed. As a result, the pressure of the fluid increases stepwise preventing the occurrence of uncomfortable kickback at the brake pedal.

Anti-skid braking apparatus for vehicles

A hydraulic pressure control device in a vehicle anti-skid braking system includes a brake master cylinder, a wheel brake actuating cylinder for braking a wheel in response to a fluid pressure from the brake master cylinder, a directional control valve connected between the brake master cylinder and the wheel brake actuating cylinder and shiftable between pressure-increasing and pressure-decreasing modes, and a pressure control valve for connecting the brake master cylinder to a fluid pressure return passage having a reservoir, a pump, and an accumulator when the directional control valve is in the pressure-increasing mode.

In a map display system for vehicles, spot coordinates are preliminarily stored which represent map forming spots and are provided with a coordinate origin of a specified spot, and display coordinates indicating map changing frames are also preliminarily stored. The display coordinate of the present position of the vehicle is compared with the display coordinate of a map changing frame. When the present position reaches the map changing frame, the spot coordinate of the present position is compared with the preliminarily stored spot coordinates so as to extract spots forming a new map centering the present position of the vehicle.

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Anjo, Japan

Hiroshi Fujinami