| 摘要 |
<p>A motor vehicle has an engine, an automatic transmission and a chassis. A control system for the motor vehicle includes a gear ratio change control system, an engine control system and a communications channel through which the gear ratio change control system and the engine control system communicate with one another. The gear ratio change control system has function units being dependent on data of the engine and the chassis and being integrated with the engine control system. A gear ratio change unit has function units being dependent on data of the transmission. The communications channel exchanges data required for controlling the transmission, between the engine control system and the gear ratio change unit. An emergency device switches-over the gear ratio change unit, upon a malfunction of the communications channel, to receive control signals from a device not communicating with it through the communications channel.</p> |
