Methods and systems are provided for operating a driveline of a hybrid vehicle during conditions when a temperature of a motor/generator is increasing. In one example, a method is provided that adjusts engine speed as a function of motor/generator temperature while maintaining engine power output when driver demand wheel power is constant.

The disclosure provides an engine control method, system, and vehicle, and the vehicle comprises a battery and an engine, wherein the method includes: obtaining a current maximum discharge power value of the battery, and a current maximum external characteristic power value of the vehicle; obtaining a current opening value and a current opening change rate of an accelerator pedal of the vehicle; determining a driving intention based on the current opening value and the current opening change rate; and controlling start and stop of the engine according to the driving intention, the current maximum discharge power value, and the current maximum external characteristic power value of the vehicle. Since the driving intention is determined by the current opening value and the current opening change rate in advance, and based on the determined driving intention, in combination with the current maximum discharge power value of the battery and the current maximum external characteristic power value of the vehicle, the power response is carried out in advance so as to ensure that a larger power request can be satisfied at the next moment, thus avoiding the case where the engine is unnecessarily started or is not started in time.

A system and method for power management of hybrid electric vehicles is provided. In some implementations, a plug-in series hybrid electric vehicle may include an engine, a motor/generator (MG), a traction motor, an energy storage device, and a controller. The controller is coupled to the engine and the MG to control operation of the engine and the MG such that a state-of-charge (SOC) of the energy storage device tracks a dynamic reference SOC profile during a trip and an average engine power (AEP) is maintained above a threshold. In some instances, maintaining AEP above a threshold supports emission control of the vehicle.

A method of controlling uphill driving of a hybrid vehicle provided with a dual clutch transmission (DCT) may include determining, by a controller, a driving state of a vehicle on the basis of information collected from the vehicle; when the vehicle is determined as being in a uphill driving state, performing, by the controller, high torque control on an engine of the vehicle by increasing an engine torque to control the engine at a predetermined high torque engine operating point and reducing a motor torque of a motor in the vehicle to satisfy a driver request torque; and during the performing of the high torque control on the engine, comparing, by the controller, a state of charge (SOC) value of a battery with a set first SOC threshold value, and when the SOC value of the battery is less than or equal to the first SOC threshold value, performing engine and motor speed control to defend the SOC value of the battery.

An electric drive system for a vehicle and method includes controlling a propulsion system of the vehicle to operate according to a first torque-speed relationship between a power generated by an engine and a speed of the engine. The engine is controlled according to the first torque-speed relationship during acceleration of the vehicle by motors that are powered by operation of the engine. The method includes determining that operation of the propulsion system has reached a steady state following the propulsion system operating according to the first torque-speed relationship and controlling the propulsion system to operate according to a second torque-speed relationship between the power and the speed of the engine. The second torque-speed relationship is reduced relative to the first torque-speed relationship such that the engine speed in the first torque-speed relationship is associated with a greater amount of power than in the second torque-speed relationship.

A vehicle control device controls a hybrid vehicle including: an internal combustion engine having an EGR device; an electric drive device that drives the vehicle and performs an engine-based power generation; a power storage device; and a travel route acquisition device. The vehicle include an EV drive mode and an HV drive mode. The vehicle control device is configured to: where the vehicle is started under a cold condition, calculate, based on the travel route information, an average vehicle driving power in a vehicle running section under a warm condition after the start; and limit the amount of power generated by the engine-based power generation in the cold condition to be smaller when the calculated average vehicle driving power is high than when it is low, and, during the HV drive mode after a transition to the warm condition, execute the engine-based power generation accompanied by the EGR.

A vehicle control device 40 of a vehicle 200 provided with a cooling circuit 20 using a circulating cooling liquid to cool motors 112, 114 for driving a vehicle or a PCU 118 and a refrigerant circuit 30 discharging heat of the circulating refrigerant for air-conditioning a passenger compartment to the cooling liquid of the cooling circuit 20 and driven by jointly using the outputs of the motors 112, 114 and the output of an engine 12, which control device comprising a cooling mode switching part 42 switching a cooling mode from a normal control mode to a cooling priority control mode cooling the passenger compartment with priority when a predetermined condition stands and a vehicle control part 43 making the outputs of the motors 112, 114 decrease and making the output of the engine 12 increase when the normal control mode is switched to the cooling priority control mode.

A system and method for controlling driving of an electronic 4-wheel drive hybrid vehicle appropriately executes torque distribution and compensation to front wheels and rear wheels in each gear position to satisfy driver's requested torque depending on selected driving mode of the electronic 4-wheel drive hybrid vehicle in which an engine and a front wheel motor are connected to the front wheels and a rear wheel motor is connected to the rear wheels, thereby being capable of increasing acceleration performance when a sports mode is selected as the driving mode and realizing acceleration linearity when a comfort mode is selected as the driving mode.

The present disclosure relates to an eco-friendly vehicle in which valet mode can be controlled with detailed control levels, and a method for controlling the same mode. A method for controlling valet mode of a vehicle according to an embodiment of the present disclosure comprises determining whether an entry condition for the valet mode to be satisfied, determining, if the condition being satisfied, one level among a plurality of levels for the valet mode based on at least one of a vehicle state and a driving environment and performing a vehicle control according to the determined level, wherein the plurality of levels are different from one another in whether or not a restriction to be made to at least part of a powertrain and a function or a degree of the restriction.

A system is provided for controlling engine fueling and includes an internal combustion engine, a fuel source, means for delivering fuel from the fuel source to the engine, and a controller configured to control the fuel delivering means according to a first operational mode so that, upon attaining a predetermined operational state of the engine, an amount of fuel delivered to the engine per unit time is kept constant. The system will typically but not necessarily be provided in a vehicle such as a truck or a passenger automobile. A method for controlling engine fueling is also provided.