US 6,212,450 B1Granted

Data carrier system

AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho

InventorsSadao Kokubu, Hisashi Aoki, Takashi Mizuno, Shinichi Koga

Life of this patent

Estimating the term…

Loading patent…

Abstract

When an engine is started with a key 19A inserted in an ignition key cylinder of a vehicle 11, a vehicle-side controller 12 transmits operational data to the key 19A and stores in the key 19A. Further, when a personal computer 30 is operated with the key 19A inserted in an R/W device 31, the R/W device 31 reads the operational data from the key 19A and transfers to the personal computer 30. In this structure, when a storage capacity of the key 19A becomes full, the vehicle-side controller 12 stores the operational data in a storage portion of its own, and when the key 19A is initialized, the stored operational data is written in the key 19A. For this reason, even when initialization of the key 19A is difficult, deletion of the operational data is prevented.

Claims14

Dependent claims

A data carrier system characterized by comprising:

a vehicle-side control device installed in a vehicle and transmitting operational data of the vehicle;
and
a receiving device for receiving operational data transmitted from the vehicle-side control device,
wherein the receiving device includes a receiving-device-side storage portion which stores received operational data, and said vehicle-side control device includes:
a storage capacity detecting portion for detecting the amount of operational data stored in said receiving-device-side storage portion and an initialization detecting portion for detecting that said receiving-device-side storage portion is initialized such that the amount of operational data stored in said receiving-device-side storage portion is zero, and
a vehicle-side-control-device-side storage portion which stores the operational data, and
when said storage capacity detecting portion detects that the amount of operational data stored in said receiving-device-side storage portion is in a full state, the vehicle-side control device writes operational data in said vehicle-side-control-device-side storage portion, and
when said storage capacity detecting portion detects that said receiving-device-side storage portion is initialized, the vehicle-side control device writes the operational data stored in said vehicle-side-control-device-side storage portion in said receiving-device-side storage portion of the receiving device.

5 more elements

Dependencies are inferred from the claim text.