Navigation system for electric automobile
First Claim
1. A navigation system for an electric automobile having a battery, an electric drive motor for driving wheels by electric power from said battery, motor control means for controlling operation of said electric drive motor by adjusting electric power fed to said electric drive motor in accordance with an output demand operation, and remaining capacity detection means for detecting a remaining capacity of said battery, the navigation system comprising:
- road map information storage means for storing road map information;
drive plan information input means for inputting drive plan information including a destination of said automobile;
present position detecting means for detecting a present position of said automobile;
indication control means for controlling at least one of screen display information and audio indication information of map information and route information on the basis of information from said road map information storage means, said drive plan information input means, and said present position detecting means;
reachability determination means for determining, based on a distance planned to be driven by said automobile from the detected present position to said destination and said remaining capacity of said battery determined by said remaining capacity detection means, whether said automobile can reach said destination with said remaining capacity of said battery; and
use-condition-limited reachability determination means for limiting use of electrical power to extend a driving range of said automobile.
3 Assignments
0 Petitions
Accused Products
Abstract
A navigation system suitable for use in an electric automobile, especially hybrid electric automobiles, easily and properly controls charging state of a battery in the electric automobile while making use of characteristic features of the navigation system. The navigation system is mounted on the electric automobile. A destination, to which one wants to drive by the automobile, is inputted as drive plan information. Based on a distance planned to be driven by the automobile to the destination and a remaining capacity of the battery determined by remaining capacity detector, it is determined whether the automobile can reach the destination with the remaining capacity of the battery.
327 Citations
23 Claims
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1. A navigation system for an electric automobile having a battery, an electric drive motor for driving wheels by electric power from said battery, motor control means for controlling operation of said electric drive motor by adjusting electric power fed to said electric drive motor in accordance with an output demand operation, and remaining capacity detection means for detecting a remaining capacity of said battery, the navigation system comprising:
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road map information storage means for storing road map information; drive plan information input means for inputting drive plan information including a destination of said automobile; present position detecting means for detecting a present position of said automobile; indication control means for controlling at least one of screen display information and audio indication information of map information and route information on the basis of information from said road map information storage means, said drive plan information input means, and said present position detecting means; reachability determination means for determining, based on a distance planned to be driven by said automobile from the detected present position to said destination and said remaining capacity of said battery determined by said remaining capacity detection means, whether said automobile can reach said destination with said remaining capacity of said battery; and use-condition-limited reachability determination means for limiting use of electrical power to extend a driving range of said automobile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A navigation method for providing a guidance concerning travelling of an electric automobile having a battery, an electric drive motor for driving wheels by electric power from said battery, motor control means for controlling operation of said electric drive motor by adjusting electric power to be fed to said electric drive motor in accordance with an output demand operation, and remaining capacity detection means for detecting a remaining capacity of said battery, by using a navigation system, mounted on said electric automobile, providing with,
road map information storage means for storing road map information, drive plan information input means for inputting operation with respect to information on a drive plan of an automobile, present position detecting means for detecting a present position of said automobile, and indication control means for controlling at least one of screen display information and audio indication information of map information and route information on the basis of pieces of information from said road map information storage means, said drive plan information input means and said present position detecting means, the method comprising: -
inputting, as a first step, a destination of said automobile via said drive plan information input means, determining, as a second step, based on a distance planned to be driven by said automobile from the detected present position to said destination and said remaining capacity of said battery determined by said remaining capacity detection means, whether said automobile can reach said destination with said remaining capacity of said battery, indicating, as a third step, via said indication control means on the basis of results of a determination in said second step; and limiting use of electrical power to extend a driving range of said automobile. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A navigation system for an electric automobile having a battery, an electric drive motor for driving wheels by electric power from said battery, motor control means for controlling operation of said electric drive motor by adjusting electric power fed to said electric drive motor in accordance with an output demand operation, and remaining capacity detection means for detecting a remaining capacity of said battery, the navigation system comprising:
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an alternator connected to said battery to permit charging of said battery; a dynamo head engine for driving said alternator; heat engine control means for controlling operation of said heat engine, whereby said automobile being constructed as a hybrid electric automobile having, as drive modes, a power-generating drive mode in which said automobile is driven while operating said alternator as needed and a power-non-generating drive mode in which said automobile is driven only by electric power charged in said battery without operating said alternator; road map information storage means for storing road map information; drive plan information input means for inputting drive plan information including a destination of said automobile; present position detecting means for detecting a present position of said automobile; indication control means for controlling at least one of screen display information and audio indication information of map information and route information on the basis of information from said road map information storage means, said drive plan information input means, and said present position detecting means; reachability determination means for determining, based on a distance planned to be driven by said automobile from the detected present position to said destination and said remaining capacity of said battery determined by said remaining capacity detection means, whether said automobile can reach said destination with said remaining capacity of said battery; pollution-inhibited area storage means containing information on a pollution-inhibited area corresponding to said road map information; area determination means for determining, based on information from said present position detection means and said pollution-inhibited area storage means, whether said present position of said automobile is in said pollution-inhibited area; and drive mode selection command means for outputting a command signal to said heat engine control means on the basis of results of a determination by said area determination means so that said power-non-generating drive mode is selected when said present position of said automobile is found to be within said pollution-inhibited area but said power-generating drive mode is selected when said present position of said automobile is found to be outside said pollution-inhibited area. - View Dependent Claims (23)
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Specification