Data transmission device for a motor vehicle, comprising a pulse generator and a monitoring unit, as well as a pulse generator for the monitoring unit

US6144927A · kind A · utility

Assignee

• Mannesmann VDO AG · DE

Inventors

• Thomas Grill · Villingen-Schwenningen, DE
• Martin Gruler · Aixheim, DE
• Ludwig Buscher · Villingen-Schwenningen, DE
• Helmut Bacic · Rehna, DE
• Norbert Lais · Villingen-Schwenningen, DE
• Hartmut Schultze · Villingen-Schwenningen, DE
• Josef Wangler · Villingen-Schwenningen, DE

Key dates

• Filing date: Sep 14, 1998
• Grant date: Nov 7, 2000
• Expiry date: Sep 14, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/285
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A data-transmission device has a pulse generator (1) and a monitoring unit (20) for use in a vehicle. A signal generated by the sensor (2) is transmitted from the pulse generator (1) to the monitoring unit (20) by a signal line (9) and also, when requested by the monitoring unit, is transmitted in encrypted form along a data line (19). The signal generated by the pulse generator (1) is first stored in an intermediate store. Before transmission, the contents of this store are encrypted. On arrival in the monitoring unit, the encrypted signal is compared with the signal previously transmitted in the usual way and recorded there. This is a security check which reveals any manipulations which have been made during transmission.