EP0548748A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Residual range indicator device for a storage battery-powered vehicle
Assignee: Fiat Auto SpA
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Filing: 1992-12-15
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Granted: —
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Expires: 2012-12-15
Abstract
Abstract A residual range indicator device for a storage battery-powered electric vehicle, comprising a processor unit connected to a memory unit and to a display device, in which the indicator device is further connected to a device for measuring the distance travelled by the electric vehicle and to a device for measuring the charge present in the storage batteries, the memory unit containing data relative to the electrical-charge consumption of the vehicle as a function of the distance travelled, as a function of the type of route and as a function of other operating parameters, the processor unit executing a control programme comprising the following functions: identifying, on the basis of the measurements made by the travelled distance measuring device and by the charge measuring device, the type of route travelled by the electric vehicle; and calculating, on the basis of the data contained in the memory unit, the distance which the electric vehicle is still able to travel.
Inventors
- 👤 Roberto Guerzoni
- 👤 Piergiorgio Varrone
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
B; B60; B60L; B60L58/00; B60L58/10; B60L58/12; B60L58/13; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A residual range indicator device for a storage battery-powered electric vehicle, comprising essentially a processor unit connected to a memory unit and to a display device, characterised in that said indicator device is further connected to a device for measuring the distance travelled by said electric vehicle and to a device for measuring the charge present in the storage batteries, said memory unit containing data relative to the electrical charge consumption of the vehicle as a function of the distance travelled, as a function of the type of route and as a function of at least one other measurable physical parameter, said processor unit executing a control programme comprising the following functions: identifying, on the basis of the measurements made by said travelled distance measuring device and by said charge measuring device, the type of route travelled by the electric vehicle; calculating, on the basis of said data contained in said memory unit, the distance which the electric vehicle is still able to travel; and displaying the value of said distance on said display device.
Claim 2
Dependent Claim
98 words
A residual range indicator device as claimed in claim 1, characterised in that said indicator device is also connected to a battery charger, said control programme executed by said processor unit comprising the function of updating, whenever said processor unit receives a charge commencement signal from said battery charger, the data contained in said memory unit by adding data relative to the last route followed, so that the indicator device is able, during normal use of the electric vehicle, to increase its degree of knowledge of the behaviour of the vehicle in relation to ever more route types.
Claim 3
Dependent Claim
60 words
A residual range indicator device as claimed in claim 1, characterised in that said control programme executed by said processor unit comprises the function of indicating to the user, by means of said display device, the fact that the calculation of the distance the electric vehicle is still able to travel has a result less than a certain minimum value.
Claim 4
Dependent Claim
63 words
A residual range indicator device as claimed in claim 1, characterised by further comprising a warning device and being connected to a device form measuring the voltage of said storage batteries, said control programme executed by said processor unit comprising the function of activating said warning device whenever the measured voltage is permanently less than the minimum discharge voltage of said storage batteries.
Claim 5
Dependent Claim
130 words
A residual range indicator device as claimed in claim 1, characterised in that said indicator device is further connected to a device for measuring the temperature of said storage batteries, said memory unit also containing data relative to the electrical load consumption as a function of the storage battery temperature, and said processor unit executing a control programme comprising the following functions: identifying on the basis of the measurements made by said travelled distance measuring device, by said charge measuring device and by said temperature measuring device the type of route travelled by the electric vehicle; calculating on the basis of said data contained in said memory unit the distance which the electric vehicle is still able to travel; and displaying the value of said distance on said display device.
Claim 6
Dependent Claim
92 words
A residual range indicator device as claimed in claim 1, characterised in that said indicator device is also connected to a battery charger, said control programme executed by said processor unit comprising the following functions: whenever said processor unit receives a charge commencement signal from said battery charger, calculating moment by moment on the basis of data contained in said memory unit relative to a standard route the distance which the electric vehicle is still able to travel; and displaying moment by moment the value of said distance on said display device.
Claim 7
Dependent Claim
28 words
A residual range indicator device as claimed in claim 1, characterised in that said device for measuring the charge present in said storage batteries is an ampere-hour meter.
Claim 8
Dependent Claim
28 words
A residual range indicator device as claimed in claim 7, characterised in that said ampere-hour meter has an input for correctly re-initializing the value of the measured charge.
References Cited (Backward Citations)
DE3142038A1
Cited
DE3902339A1
Cited
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