A system for controlling a hybrid electric vehicle, the hybrid electric vehicle having an electric vehicle mode, in which a motor generator (M/G) provides a propelling power for the vehicle as the sole power source, in addition to a hybrid electric vehicle mode, in which the M/G can assist an engine by providing an additional torque, the system comprising: a traction battery storing energy useable to power the M/G, and a controller configured to work during driving the vehicle in HEV mode to cause the M/G to act as a motor or as a generator in accordance with an assessment of the SOC of the traction battery, which assessment is made using an unaltered version of a group of SOC ranges, one for torque assist and the other for electrical-generation, the system being characterized in that the controller activates, in response to an anticipated subsequent constraint to driving the vehicle in EV mode, an HEV mode in which the controller causes the M/G to act as a motor or as a generator in accordance with an assessment of the SOC of the traction battery, which assessment is made using an altered version of the group, for assist in correcting the engine operating point of the engine, wherein the altered and unaltered versions are the same except that at least one of the SOC ranges of the altered version of the group is in the form of what is selected from a group consisting of: a SOC range for electrical-generation that is shortened as compared to its counterpart in the unaltered version, and a SOC range for torque-assist that is extended as compared to its counterpart in the unaltered version. the hybrid electric vehicle having an electric vehicle mode, in which a motor generator (M/G) provides a propelling power for the vehicle as the sole power source, in addition to a hybrid electric vehicle mode, in which the M/G can assist an engine by providing an additional torque, the system comprising: a traction battery storing energy useable to power the M/G, and a controller configured to work during driving the vehicle in HEV mode to cause the M/G to act as a motor or as a generator in accordance with an assessment of the SOC of the traction battery, which assessment is made using an unaltered version of a group of SOC ranges, one for torque assist and the other for electrical-generation, the system being characterized in that the controller activates, in response to an anticipated subsequent constraint to driving the vehicle in EV mode, an HEV mode in which the controller causes the M/G to act as a motor or as a generator in accordance with an assessment of the SOC of the traction battery, which assessment is made using an altered version of the group, for assist in correcting the engine operating point of the engine, wherein the altered and unaltered versions are the same except that at least one of the SOC ranges of the altered version of the group is in the form of what is selected from a group consisting of: a SOC range for electrical-generation that is shortened as compared to its counterpart in the unaltered version, and a SOC range for torque-assist that is extended as compared to its counterpart in the unaltered version. a traction battery storing energy useable to power the M/G, and a controller configured to work during driving the vehicle in HEV mode to cause the M/G to act as a motor or as a generator in accordance with an assessment of the SOC of the traction battery, which assessment is made using an unaltered version of a group of SOC ranges, one for torque assist and the other for electrical-generation, the system being characterized in that the controller activates, in response to an anticipated subsequent constraint to driving the vehicle in EV mode, an HEV mode in which the controller causes the M/G to act as a motor or as a generator in accordance with an assessment of the SOC of the traction battery, which assessment is made using an altered version of the group, for assist in correcting the engine operating point of the engine, wherein the altered and unaltered versions are the same except that at least one of the SOC ranges of the altered version of the group is in the form of what is selected from a group consisting of: a SOC range for electrical-generation that is shortened as compared to its counterpart in the unaltered version, and a SOC range for torque-assist that is extended as compared to its counterpart in the unaltered version. a SOC range for electrical-generation that is shortened as compared to its counterpart in the unaltered version, and a SOC range for torque-assist that is extended as compared to its counterpart in the unaltered version.