A system for controlling regenerative braking in a hybrid vehicle, includes: a driving information sensor detecting driving information; a motor assisting a driving force of an engine in an acceleration interval of the hybrid vehicle; a motor controller charging a battery using a regenerative energy generated by the motor; a hybrid controller calculating a first braking force generated by friction in the engine according to a first gear stage of the hybrid vehicle, setting a second braking force due to friction in the engine used to compensate for a limited regenerative braking force using a kick-down shifting at a second gear stage as a target regenerative braking force, and controlling the kick-down shifting using a third gear stage that compensates for the limited regenerative braking force and corresponds to the braking force due to friction in the engine; and a transmission controller performing the kick-down shifting.

Systems and methods for assessing runway conditions are disclosed. The system may comprise a brake control unit having an internal inertial sensor. The brake control unit may be configured to calculate a runway coefficient of friction to assess surface conditions of the runway. The brake control unit may monitor braking in an aircraft to detect a skid condition. In response to detecting the skid condition, the brake control unit may calculate an aircraft deceleration of the aircraft with the inertial sensor. The brake control unit may estimate the runway coefficient of friction based on the aircraft deceleration, an aerodynamic drag force of the aircraft, and a thrust reverse force of the aircraft.

A control method for a hybrid vehicle is provided. The hybrid vehicle includes: a power generator that charges a battery using power of an engine; an electric motor that drives a driving wheel by electric power of the battery; a particulate filter that collects particulate matters contained in exhaust gas from the engine. In the control method, electric power is supplied from the battery to the power generator to perform a motoring operation of rotating the engine by the power generator to supply air to the particulate filter when particulate matters of a first predetermined amount or more are accumulated in the particulate filter. And motoring operation is prohibited even if the particulate filter is accumulated with particulate matters of the first predetermined amount or more when a predetermined first condition that a driver does not intend a motoring operation is satisfied.

A method for turning off an internal combustion engine (ICE) where a clutch arrangement has first and second clutches that respectively couple the ICE to first and second input shafts of a transmission. The input shafts are drivingly connected to first and second sets of gears, respectively. The sets of gears are connected to an output shaft of the transmission. The method includes: controlling the ICE in an idling state when the vehicle is in standstill, wherein the clutches are in open positions; engaging the first input shaft with a first pre-selected gear, and engaging the second input shaft with a second pre-selected gear; initiating an engine turning off command; stopping the ICE by at least partly closing the clutches for simultaneously introducing torque transfer to the clutches into a transmission tie-up state for a controlled engine stop, wherein engine inertia of the ICE is captured in the clutches.

A method is provided to control an engine braking operation of a vehicle provided with a dual clutch transmission. The dual clutch transmission is adapted to be set into different gear-combinations, each including an active gear selection through which torque can be transmitted, and a passive gear selection through which no torque can be transmitted. In a pre-set number of gear-combinations, the first input shaft and the main shaft have a synchronised rotation. When an engine braking operation is performed when the transmission is set in one of the pre-set number of gear-combinations modifying said engine braking operation such that a damaging load upon said spigot bearing is reduced.

A system for controlling regenerative braking in a hybrid vehicle, includes: a driving information sensor detecting driving information; a motor assisting a driving force of an engine in an acceleration interval of the hybrid vehicle; a motor controller charging a battery using a regenerative energy generated by the motor; a hybrid controller calculating a first braking force generated by friction in the engine according to a first gear stage of the hybrid vehicle, setting a second braking force due to friction in the engine used to compensate for a limited regenerative braking force using a kick-down shifting at a second gear stage as a target regenerative braking force, and controlling the kick-down shifting using a third gear stage that compensates for the limited regenerative braking force and corresponds to the braking force due to friction in the engine; and a transmission controller performing the kick-down shifting.

An emergency braking force generation system includes: an engine for performing combustion using air and fuel injected from an injector and generating torque; a cooling fan which is rotated by the torque of the engine and supplies air into one side of the engine; a cooling fan clutch that selectively transmits the torque of the engine into the cooling fan; a transmission that varies a gear ratio by receiving the torque of the engine and rotates a driving wheel; and a control portion that controls the cooling fan clutch such that the cooling fan is integrally rotated with the engine when an emergency braking signal is generated so as to increase a load of rotation of the engine through the cooling fan.

A method and system of determining the instant gradient of a road, taking into account positive and negative drive torque, may be used to select one of a plurality of shift maps for a vehicle automatic transmission. The invention takes into account vehicle retardation due to braking, and permits consistent adoption of a shift map appropriate to the instant gradient.

An apparatus and method for guiding inertia driving of a manual transmission vehicle is provided to maximally extend a no-load driving state with an inertia driving state by blocking a power transmission path of a drive train. The apparatus includes a user selection switch operated to select a coasting mode and a display unit configured to display an entrance enabled state to an inertia driving mode to allow the entrance enabled state to be visually recognized. In addition, a controller is configured to receive an operation signal of the user selection switch and display the entrance enabled state to the inertia driving mode on the display unit to induce the inertia driving mode selection.

An emergency braking force generation system includes: an engine for performing combustion using air and fuel injected from an injector and generating torque; a cooling fan which is rotated by the torque of the engine and supplies air into one side of the engine; a cooling fan clutch that selectively transmits the torque of the engine into the cooling fan; a transmission that varies a gear ratio by receiving the torque of the engine and rotates a driving wheel; and a control portion that controls the cooling fan clutch such that the cooling fan is integrally rotated with the engine when an emergency braking signal is generated so as to increase a load of rotation of the engine through the cooling fan.