TECHNICAL FIELD

The present disclosure relates to control systems for vehicles and vehicle powertrains.

BACKGROUND

Vehicles may include power generating devices, such as an engine or an electric motor, that are configured to generate torque within a powertrain of the vehicle in order to propel the vehicle.

SUMMARY

A vehicle includes a powertrain, an inertial measurement unit, and a controller. The powertrain has a step-ratio transmission, an engine, and an electric machine. The step-ratio transmission has an input and an output. The engine is configured to generate and deliver torque to the input. The electric machine is configured to generate and deliver torque to the input. The inertial measurement unit is configured to measure inertial forces exerted onto the vehicle. The controller is programmed to, in response to a demanded torque at the output and a non-transient condition of the powertrain, control the torque at the output based on a torque at the input and a gear ratio of the step-ratio transmission. The controller is further programmed to, in response to the demanded torque at the output and a transient condition of the powertrain, control the torque at the output based on a mapped relationship between the inertial forces and a vehicle velocity, wherein the mapped relationship utilizes first, second, third, and fourth mapping parameters.

A vehicle includes a transmission, a powerplant, an inertial measurement unit, and a controller. The transmission has an input shaft and an output shaft. The powerplant is configured to generate and deliver torque to the input shaft. The inertial measurement unit is configured to measure inertial forces exerted onto the vehicle. The controller is programmed to, in response to a demanded torque at the output shaft and a non-transient condition of the vehicle, control the torque at the output shaft based on a torque at the input shaft and a gear ratio of the step-ratio transmission. The controller is further programmed to, in response to the demanded torque at the output shaft and a transient condition of the vehicle, control the torque at the output shaft based on the inertial forces and a vehicle velocity.

A vehicle includes a transmission, an engine, a disconnect clutch, an inertial measurement unit, and a controller. The transmission has an input shaft and an output shaft. The engine is configured to generate and deliver torque to the input shaft. The disconnect clutch is configured to connect and disconnect the engine from the input shaft. The inertial measurement unit is configured to measure inertial forces exerted onto the vehicle. The controller is programmed to, in response to a demanded torque at the output shaft and a non-transient condition of the vehicle, control the torque at the output shaft based on a torque at the input and a gear ratio of the step-ratio transmission. The controller is further programmed to, in response to the demanded torque at the output and a transient condition of the vehicle, control the torque at the output based on a mapped relationship between the inertial forces and a vehicle velocity, wherein the mapped relationship utilizes first, second, third, and fourth mapping parameters. The controller is further programmed to, derive the values of the first, second, third, and fourth mapping parameters based on the torque at the output, the velocity of the vehicle, and the inertial forces during non-transient conditions of the vehicle.

