US 12,697,986 B2 · Torque monitoring system and method of a hybrid electric vehicle

Abstract

A torque monitoring system and method of a hybrid electric vehicle is provided that accurately monitors and diagnoses a compensation torque, such as an intervention torque generated from the vehicle's perspective and an engine friction torque, in addition to a driver's request torque. The torque monitoring system includes a control unit configured to: determine final command torques for respective power sources; determine a requested torque for monitoring based on vehicle driving information; determine compensation torques for the respective power sources depending on whether an engine clutch is engaged based on intervention torques for the respective power sources and additional torques for the respective power sources; determine a command torque limit value; and determine whether there is an abnormality in each torque determination process based on the determined command torque limit value and a sum of the determined final command torques for the respective power sources.

Claims21

Dependent claims

A torque monitoring method of a hybrid electric vehicle, comprising:

determining, by a control unit, final command torques for respective power sources by adding intervention torques for the respective power sources and additional torques for the respective power sources for torque compensation to command torques for the respective power sources distributed from a driver's requested torque;
determining, by the control unit, a requested torque for monitoring based on vehicle driving information;
determining, by the control unit, compensation torques for the respective power sources depending on whether an engine clutch is engaged based on the intervention torques and the additional torques;
determining, by the control unit, a command torque limit value that is a sum of the determined requested torque and the determined compensation torques;
determining, by the control unit, whether there is an abnormality in a torque determination process at each operation based on the determined command torque limit value and a sum of the determined final command torques for the respective power sources;
and
controlling, by the control unit, torques of a vehicle drive system based on the driver's requested torque, wherein the control unit is mounted on the hybrid electric vehicle.

4 more elements

A torque monitoring system of a hybrid electric vehicle, comprising a control unit,

wherein when a driver's requested torque is determined and a drive mode of the hybrid electric vehicle is determined, the control unit is configured to:
determine command torques for respective power sources based on the driver's requested torque by distributing the driver's requested torque based on the drive mode;
determine final command torques for the respective power sources by adding intervention torques for the respective power sources and additional torques for the respective power sources for torque compensation to the determined command torques for the respective power sources,
determine a requested torque for monitoring based on vehicle driving information;
determine compensation torques for the respective power sources depending on whether an engine clutch is engaged based on the intervention torques for the respective power sources and the additional torques for the respective power sources;
determine a command torque limit value that is a sum of the determined requested torque and the determined compensation torques;
and
determine whether there is an abnormality in each torque determination process based on the determined command torque limit value and a sum of the determined final command torques for the respective power sources;
and
wherein the control unit is mounted on the hybrid electric vehicle and is configured to control torques of a vehicle drive system based on the driver's requested torque.

7 more elements

Dependencies are inferred from the claim text.

Torque monitoring system and method of a hybrid electric vehicle

Life of this patent

Torque monitoring system and method of a hybrid electric vehicle

Life of this patent

Abstract

Claims21