System and method of load sharing control for automobile

• US 5,157,610 A
• Filed: 02/15/1990
• Issued: 10/20/1992
• Est. Priority Date: 02/15/1989
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Asano, Seiji, Furuhashi, Toshio, Miura, Kiyoshi, Katogi, Kozo, Watanabe, Shizuhisa
• Primary Examiner(s): Black, Thomas G.
• Application Number:
  US07/480,284
• Time in Patent Office: 978 Days
• Field of Search: 364/431.01, 364/424.03, 364/551.01, 364/424.04, 364/138, 340/870.16, 340/870.03, 73/117.2, 73/117.3
• US Class Current: 701/32
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C

Abstract

A system and method for load sharing processing operations between a vehicle mounted station (105) and a stationary base station (25) having a large capacity host computer is described. The vehicle mounted station has detectors for determining operating conditions of a vehicle and controllers (3, 4, 501) for varying the operating conditions. The controllers are connected to a transmitter-receiver (5) which is arranged to communicate over a path (10) with a transmitter-receiver (11) of the base station. The base station has a host computer (18) having a large memory capacity. At predetermined intervals, for example, distance of travel or at engine stop, the vehicle transmitter (5) transmits operating conditions to the base receiver (11) for data processing and the base transmitter (11) then transmits processed data back to the vehicle receiver (5), whereupon the controllers (3, 4, 501) modify the vehicle operating conditions. The vehicle operating conditions may be an indication of life expectancy of fuel injectors or sensors, updating data processing maps. The presence of abnormal operating conditions may be detected by the vehicle mounted station, evaluated by the base station and an emergency warning indication provided back to the vehicle mounted station, or if the abnormal condition is not of an emergency nature then counter measures are transmitted from the base station to the vehicle mounted station.

Claims

1. A method of load sharing processing operations between a vehicle mounted station and a base station including the steps of said vehicle mounted station detecting operating conditions of the vehicle, transmitting data representative of the detected operating conditions to the base station which do not require real-time processing and are determined to be processed at the base station, said base station receiving said data from the vehicle mounted station, processing said data in accordance with data stored by said base station, said base station transmitting processed data to a receiver at said vehicle mounted station, and control means at said vehicle mounted station connected to the vehicle mounted receiver and performing at least one of revising and displaying the vehicle operating conditions in dependence upon the processed data received.

2. A method as claimed in claim 1 wherein the vehicle mounted station detected operating conditions are performed by a detecting means which detects at least one of water temperature, air/fuel ratio, air flow quantity, battery voltage, throttle valve opening angle, engine speed (N), transmission gear position and suspension setting.

3. A method as claimed in claim 1 wherein the vehicle mounted station includes a control means which controls at least one of a fuel injector, a transmission gear change means, and a suspension setting actuator.

4. A method as claimed in claim 1 wherein the data transmitted from the vehicle mounted station to the base station is performed at times of occurrence of predetermined conditions including at least one of the vehicle covering a predetermined distance, detection of the engine ceasing rotation and low fuel tank condition.

5. A method as claimed in claim 1 wherein data transmitted between the vehicle mounted station and the base station includes header bits, vehicle identification bits, data control bits, data array bits, check symbol bits and end of transmission bits.

6. A method as claimed in claim 1 wherein the vehicle mounted station transmits a request to transmit to the base station, said base station transmits a permission to transmit for the vehicle mounted station, said vehicle mounted station transmits data including header bits, vehicle identification bits, data control bits, data array bits and check symbol bits, said base station transmits a receipt acknowledgement and said base station transmits end of transmission bits.

7. A method as claimed in claim 1 wherein the vehicle mounted station contains at least one map indicative of vehicle operating conditions including an indication of ageing in at least one of vehicle injectors and sensors, said map being transmitted by said vehicle mounted station to said base station, said base station comparing transmitted map values with previously transmitted map values and estimating the amount of deterioration in said injectors and sensors, said base station estimating the life expectancy of said injectors and sensors and to transmit data indicative thereof to said vehicle mounted station whereby said vehicle mounted station stores said updated information and indicates the life expectancy by visual or aural means.

8. A method as claimed in claim 7 wherein corrected map values are transmitted from the base station to the vehicle mounted station when engine rotation has ceased for subsequent real time processing.

9. A method as claimed in claim 7 wherein the vehicle mounted station updates corrected map values in a series of steps during vehicle running and uses said corrected map values for real time control.

10. A method as claimed in claim 1 wherein a life predicting diagnosis of the vehicle is carried out by the base station by using current operating condition signals received from the vehicle mounted station, said predicting diagnosis being carried out at predetermined intervals including at least one of time and distance travelled.

11. A method as claimed in claim 1 wherein the vehicle mounted station detects an abnormality and to transmit data indicative thereof to said base station, said base station evaluates said abnormality and determines whether an emergency retransmission to said vehicle mounted station is necessary to provide an indicative warning by one of a display means or an aural means.

12. A method as claimed in claim 11 wherein if the abnormality is not of an emergency nature the data is stored in a failure chart prior to transmitting counter measures from the base station to said vehicle mounted station.

13. A method as claimed in claim 1 wherein the vehicle mounted station transmits an abnormal condition signal to the base station, the base station transmits a request for data to be analysed, the vehicle mounted base station transmits data for analysis, the base station diagnoses a failure and if an emergency is determined by said base station then said base station immediately transmits a warning for indication by said vehicle mounted station but if said base station determines there to be no emergency then said base station stores data indicative of the abnormality and subsequently transmits counter measures to said vehicle mounted base station whereupon said vehicle mounted base station takes appropriate action in dependence thereof.

14. A system for load sharing processing operations between a vehicle mounted station and a base station, said vehicle mounted station including

detecting means for detecting operating conditions of the vehicle,

first transmitting means for transmitting data representative of the detected operating conditions to the base station which do not require real-time processing and are determined to be processed at the base station,

first receiving means for receiving data from the base station,

and control means for controlling vehicle operating conditions,

and said base station comprising second receiver means for receiving said data from the vehicle mounted station,

processing means and storage means for processing the data received from the vehicle mounted station based upon information held in said storage means.

and second transmitting means for transmitting the processed data to the first receiving means whereupon the control means conducts at least one of revision and display of the vehicle operating conditions in dependence upon the processed data received.

15. A system as claimed in claim 14 wherein the detecting means detect at least one of a temperature water, air/fuel ratio, air flow quantity, battery voltage, throttle valve opening angle, engine speed, transmission gear position and suspension setting.

16. A system as claimed in claim 14 wherein the control means control at least one of a fuel injector, a transmission gear change means, and a suspension setting actuator.

17. A system as claimed in claim 14 wherein the first transmitting means transmit data comprising a header, a vehicle identification, data control bits, a data array, a check symbol and an end of transmission indicator.

18. A vehicle mounted station including detecting means for detecting operating conditions of a vehicle, transmitting/receiving means for transmitting data representative of the detected operating conditions to a base station which do not require real-time processing and are determined to be processed at the base station for evaluation, said transmitting/receiving means receiving the evaluated signals from the base station and applying signals representative of said evaluated signals to a control means performing at least one of vary and display said operating conditions in dependence upon said received evaluated signals.

19. A stationary base station which receives data from a vehicle mounted station which do not require real-time processing and are determined to be processed at the base station, said base station including processing means and storage means for processing the data received from the vehicle mounted station based upon information held in said storage means, the base station performing at least one of updating/correcting maps carried by a vehicle located processor indicative of ageing in at least one of vehicle located sensors and injectors, establishing the expected life expectancy of said sensors and injectors and further including transmitting means for transmitting processed data to the vehicle mounted station.

20. A method of load sharing processing operations between a processor mounted on a vehicle and a host computer located in a base station comprising the steps of, detecting operating conditions of the vehicle with sensors mounted on the vehicle;

said vehicle mounted processor performing data processing operations based upon the detected operating conditions of the vehicle and generating control signals for the vehicle actuators;

said vehicle mounted processor shifting predetermined data processing operations, together with predetermined detected operating conditions of the vehicle to said host computer at a predetermined time which data processing operations are required for operating of the vehicle but which do not require real-time processing, and rewriting a map in accordance with the processed data from said host computer, said map being carried on said vehicle and determining operating conditions of the vehicle.