Patent EP0752548A2 successfully refreshed from Google Patents.
EP0752548A2
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EP
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Control system for vehicular automatic transmission with location detecting means
Assignee: Aisin AW Co Ltd
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Filing: 1996-06-19
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Granted: —
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Expires: 2016-06-19
Abstract
Abstract A control system for a vehicular automatic transmission, comprising: running status detecting means for detecting the running status of a vehicle; and shift control means (19) for controlling the gear stage of the automatic transmission in accordance with the running status of the vehicle. The control system further comprises: memory means (15) for storing beforehand the information of a road to be run by the vehicle; detection means (11,12) for detecting the present location and running direction of the vehicle; read means (2) for reading out the road information on a running path from the present location to the location of a destination of the vehicle from the memory means (15) on the basis of the signal of the detection means and the destination location inputted; estimation means (3) for estimating the driving force of the vehicle on the running path in accordance with the road information read out; shift setting means (6) for setting such a shift schedule as to minimize the fuel consumption rate on the running path by comparing the estimated driving force and a mileage map stored beforehand; and change means (8) for changing a control pattern of the shift control means in accordance with the set shift schedule.
Inventors
- 👤 Shuzo Moroto
- 👤 Nobuaki Miki
- 👤 Muneo Kusafuka
- 👤 Yoshitaka Murase
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 07:43
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0213; B; B60; B60W; B60W2556/00; B60W2556/45; B60W2556/50; F16H59/00; F16H59/14; F16H2059/142; F16H59/60; F16H59/66; F16H2059/666; F16H2061/0015; F16H2061/0075; F16H2061/0087; F16H2061/0096; F16H59/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
A control system for a vehicular automatic transmission, comprising: running status detecting means for detecting the running status of a vehicle; and shift control means for controlling the gear stage of the automatic transmission in accordance with the running status of the vehicle, wherein the improvement comprises: (a) memory means for storing beforehand the information of a road to be run by the vehicle; (b) detection means for detecting the present location and running direction of the vehicle; (c) read means for reading out the road information on a running path from the present location to the location of a destination of the vehicle from said memory means on the basis of the signal of said detection means and the destination location inputted; (d) estimation means for estimating the driving force of the vehicle on the running path in accordance with the road information read out; (e) shift setting means for setting such a shift schedule as to minimize the fuel consumption rate on the running path by comparing the estimated driving force and a mileage map stored beforehand; and (f) change means for changing a control pattern of said shift control means in accordance with the set shift schedule.
Claim 2
Dependent Claim
138 words
A control system for a vehicular automatic transmission according to claim 1, further comprising operation status detecting means for detecting the operation statuses of accessories which operate to increase the engine load; and operation setting means for setting the operation schedules of said accessories on the running path, wherein said estimation means estimates the driving force of the vehicle on the running path in accordance with the road information coming from said read means and the operation schedules of said accessories, wherein said shift setting means sets the shift schedule for minimizing the fuel consumption rate on the running path by comparing the estimated driving force and a mileage map stored beforehand, and wherein said change means changes a control pattern of said shift control means in accordance with the shift schedule set by said shift setting means.
Claim 3
Dependent Claim
92 words
A control system for a vehicular automatic transmission according to claim 2, wherein said operation setting means sets the operation schedules of said accessories again in accordance with said changed operation status and said road information when the changes of said accessories from their initial statuses are detected by said operation status detecting means while said vehicle is running on said running path, and wherein a series of control contents of said estimation means, said shift setting means and said change means are repeated again according to the operation schedule set again.
Claim 4
Dependent Claim
138 words
A control system for a vehicular automatic transmission according to claim 3, further comprises: engine control means for increasing the fuel injection rate at a shifting time of the automatic transmission; and calculation means for simulating the fuel consumption rates in a plurality of patterns on the basis of the increase in the fuel by said engine control means, the road information coming from said read means, the driving force estimated by said estimation means and the shift schedule set by said shift setting means, wherein said shift setting means sets again the shift schedule minimizing the fuel consumption rate on the basis of the calculation result of said calculation means, and wherein said change means changes the control pattern of said shift control means in accordance with the shift schedule set again by said shift setting means.
Claim 5
Dependent Claim
188 words
A control system for a vehicular automatic transmission according to claim 4, wherein the calculation means calculates the fuel consumption rate on the basis of a first shift schedule, which is set by said shift setting means, and calculates, if it is decided on the basis of the road information coming from said read means that the distance covered by the vehicle at the time of a shift from a first gear stage through a second gear stage to the first gear stage in the first shift schedule is shorter than a predetermined covered distance, the fuel consumption rate on the basis of a second shift schedule in which the shift to the second gear stage is not effected, wherein said shift setting means sets the second shift schedule again, when the calculation of said calculation means results in that the fuel consumption rate based upon the first shift schedule is higher than that based upon the second shift schedule, and wherein said change means changes the control pattern of said shift control means in accordance with the second shift schedule set again by said shift setting means.
Claim 6
Dependent Claim
81 words
A control system for a vehicular automatic transmission according to 5, further comprising decision means decides whether or not the signal coming from said vehicle running status detecting means is within a predetermined range of the vehicle running status, as estimated by said estimation means on the basis of the road information coming from said read means, wherein said change means does not change the shift pattern if said decision means decides that said signal is not within the predetermined range.
References Cited (Backward Citations)
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