US 5,669,847 A · Control apparatus for vehicle

Abstract

With the present invention, it is possible for a vehicle to run on an uphill road at substantially the same throttle opening as on a horizontal road. When the road is uphill (hill-climbing resistance R.theta.>0), a maximum acceleration Amax for a full throttle opening is obtained according to a vehicle speed, and a maximum driving force Fmax=m.multidot.Amax+RL is calculated based on the mass of the vehicle m and the rolling and air resistance RL of the vehicle. Then, a correction coefficient HOS is obtained according to a throttle opening to calculale a required driving force Ftgt=Fmax.multidot.HOS. According to the required driving force Ftgt, hill-climbing resistance R.theta., and vehicle speed VSP, a target horsepower Ptgt=(Ftgt+R.theta.).multidot.VSP is calculated. To attain the target horsepower Ptgt, a target speed change ratio "itgt" for a continuously variable transmission is calculated to control the transmission.

Claims6

Dependent claims

A control apparatus for a vehicle having a drive system including an engine and a transmission arranged between the engine and an output drive shaft of the vehicle, comprising:

means for calculating a first value related to a hill-climbing resistance of the vehicle;
means for calculating a second value related to a driving force to be produced according to driving conditions of the vehicle;
means for calculating a third value related to the speed of the vehicle;
means for calculating a target horsepower according to the first, second, and third values;
and
means for controlling an operating parameter of the drive system of the vehicle to achieve the target horsepower.

3 more elements

Dependencies are inferred from the claim text.

Control apparatus for vehicle

Life of this patent

Control apparatus for vehicle

Life of this patent

Abstract

Claims6