A method for controlling a mild hybrid vehicle is provided. The methods includes: controlling, by a controller, a fuel system for supplying fuel to an engine to be changed to a system that simultaneously uses a gasoline direct injection fuel system and a multi-point injection fuel system based on a number of rotation of the engine and a load of the engine. The method further comprises operating, by the controller, a starter-generator so that torque of the engine operated by the gasoline direct injection fuel system and the multi-point injection fuel system becomes a demand torque of a driver of the mild hybrid vehicle when the demand torque of the driver is greater than a threshold value after the fuel system is changed to the system that simultaneously uses the gasoline direct injection fuel system and the multi-point injection fuel system.

A method for improving operating a vehicle that includes an accelerator pedal is disclosed. In one example, the method assesses a vehicle for accelerator pedal degradation and applies control actions to the vehicle is accelerator pedal degradation is determined. The control actions may include adjusting a throttle position and adjusting vehicle brakes.

Systems and methods for operating a hybrid driveline that includes an engine, a motor/generator, and a driveline disconnect clutch are described. The systems and methods may improve vehicle efficiency while providing expected vehicle operation and performance. In one example, transmission line pressure is adjusted to match driveline disconnect clutch torque capacity to driver demand torque.

A vehicle includes an engine and at least one controller. In response to a change in a rate of change of a driver control input to the vehicle, the at least one controller is programmed to alter conditions under which the engine will be started and stopped such that engine-on time increases due to the rate increasing and decreases due to the rate decreasing.

A control method when a vehicle tire bursts, a vehicle control system, and a vehicle, the method including: obtaining the wheel information of the burst tire when the vehicle tire bursts; judging the deviation condition of the vehicle after the tire burst, and obtaining a driving intention of a driver; and calculating the driving torque and the braking torque of the wheels without burst tire according to the deviation condition and the driving intention of the driver, and controlling the wheels without burst tire according to the driving torque and the braking torque to correct the deviation condition of the vehicle, so that the vehicle remains normal driving within a preset distance.

A hybrid vehicle having an engine, an electric machine, and a step-ratio transmission includes a controller programmed to, in response to an accelerator lift-pedal event when operating in a towing mode, learn a vehicle speed, and apply a lift-pedal torque when vehicle speed exceeds the learned vehicle speed, and apply an adjusted lift-pedal torque based on a gear ratio after downshifting the transmission to maintain a constant output shaft torque otherwise.

In a method for operating a powertrain of a vehicle, a first electric motor can provide a first drive torque, a second electric motor can provide a second drive torque and an internal combustion engine can provide a third drive torque to an output. The internal combustion engine and the first electric motor can be connected to the output via a separating clutch. In the event of a specific acceleration requirement, the separating clutch is closed regardless of a state of the internal combustion engine, and the first electric motor delivers the first drive torque and the second electric motor delivers the second drive torque together to the output.

An automatic transmission control device implements a downshift by disengagement of a clutch that is engaged in a gear position before the downshift. It is determined whether an engine state is in a predetermined region in which a change of an engine torque per a change of an accelerator pedal opening is smaller than that in another region, and the engine torque is within a predetermined range, and an engine rotational speed is within a predetermined range. It is determined whether an operating state is in a predetermined state of accelerator operation in which the accelerator pedal opening is larger than a predetermined value, and an accelerator pedal opening change rate has an absolute value smaller than a predetermined value. The downshift is inhibited in response to determination that the engine state is in the predetermined region and the operating state is in the predetermined state of accelerator operation.

System and methods are provided for improving fuel economy of a hybrid vehicle. A hybrid vehicle may include an EV driving mode, where the motor alone powers the hybrid vehicle. However, use of such a driving mode may be limited to conditions involving low drive force and power requests due to motor and battery power specifications. In some circumstances, the conditions during which the motor can be used to power the hybrid vehicle can be expanded. Such conditions may include instances where the driver only seeks light accelerations for a short period of time. Such an expanded EV mode may be triggered when the hybrid vehicle is travelling a downhill grade.

The disclosure relates to a system for controlling a hybrid vehicle having a primary power source such as an electric motor and a secondary power source such as an internal combustion engine, the electric motor and internal combustion engine each being connectable to a driveline of the vehicle. The system comprises a control unit operable to cause the internal combustion engine to be pre-emptively initiated and subsequently connected to the driveline. The control unit is configured and arranged to determine when the vehicle is in a first driving mode (wherein the internal combustion engine is not initiated and is disconnected from the driveline of the vehicle and wherein the electric motor and battery pack are delivering a torque to the driveline in response to a driver demanded torque). The control unit is further configured and arranged to determine that a steering angle of the vehicle and a situational status of the vehicle are indicative of a driving situation in which an expected driver demanded torque will not be met by the primary power source alone. In response thereto, the control unit is configured and arranged to automatically and pre-emptively cause the internal combustion engine to be initiated and connected to the driveline at a time before the actual driver demanded torque reaches or exceeds said expected driver demanded torque.