초록 ▼

The engine is controlled by sensing fuel pedal position, indicative of desire engine power. A characteristic transmission data field is used to select the appropriate gear or gear ratio. The engine is controlled on the basis of characteristic engine data or on the basis of an engine operating curve

The engine is controlled by sensing fuel pedal position, indicative of desire engine power. A characteristic transmission data field is used to select the appropriate gear or gear ratio. The engine is controlled on the basis of characteristic engine data or on the basis of an engine operating curve associated with minimum fuel consumption in dependence of the changes in engine speed due to the changing transmission ratio. In normal driving, the apparatus selects operation along the minimum fuel curve whereas during periods of increased power demand, the apparatus operates in dependence of characteristic engine data. Also proposed is apparatus which takes account of the operational vehicle status and effects the switchover from optimum fuel consumption to optimum power delivery with priority assigned to optimum fuel economy.

대표청구항 ▼

An apparatus for controlling an engine/transmission unit or drive train of a motor vehicle, including an operating member (10) for defining a power setpoint of the engine and at least one engine operation data storage means (13) containing characteristic power curves of said engine, the engine and t

An apparatus for controlling an engine/transmission unit or drive train of a motor vehicle, including an operating member (10) for defining a power setpoint of the engine and at least one engine operation data storage means (13) containing characteristic power curves of said engine, the engine and the transmission being controlled by means of said at least one engine data storage means in dependence on the power setpoint in such a manner that optimum energy consumption of the engine results, comprising, according to the invention, a transmission data storage means (12) containing a characteristic transmission data field including optimum transmission i as a function of (a) power setpoint Psoll, to provide for power delivery under optimum conditions, and of (b) the vehicle velocity vF to provide for optimum vehicle operation at the vehicle speed, according to the relationship i=F(Psoll, vF); a first control loop connected to set the transmission ratio in accordance with the power setpoint (Psoll) on the basis of the transmission data field; and a second control loop connected to set a fuel control aaM) in accordance with the engine power curves contained in said engine operation data storage means (13) and which defines the engine power P as a function of engine speed (nM) and of fuel input control position aM, a