There is provided a hybrid vehicle comprising a mode selection device configured to select one drive mode among a plurality of drive modes according to a user's operation. The plurality of drive modes include a first drive mode in which the hybrid vehicle is driven with power from a motor with stopping rotation of an engine and a second drive mode in which the hybrid vehicle is driven with rotation of the engine. On satisfaction of filter regeneration conditions that an accumulated amount of particulate matter accumulated on a filter is equal to or greater than a predetermined accumulated amount and that a temperature of the filter is equal to or higher than a predetermined temperature, the hybrid vehicle is driven in the second drive mode even when the first drive mode is selected by the mode selection device.

Methods and systems for improving fuel economy and reducing emissions of a vehicle with an electric motor, an engine and an energy storage device are disclosed. The methods and systems involve obtaining lookahead information and current state information, wherein the lookahead information includes a predicted vehicle speed, and the current state information includes a current state of charge (SOC) for the energy storage device coupled to the electric motor; and determining, based on the lookahead information and the current state information, a target power split between the energy storage device and the engine.

Disclosed are a hybrid electric vehicle capable of controlling starting of an engine in order to more efficiently realize heating and an engine control method therefor. The method of controlling an engine of a hybrid electric vehicle of the disclosure includes determining whether the engine is in a warmed-up state when a fully automatic temperature control system makes a heating request, making an engine startup request for heating to an engine management system configured to control the engine when the engine is in the warmed-up state, and selectively requesting the engine management system to perform cylinder deactivation (CDA) control on at least some of a plurality of cylinders of the engine depending on whether the engine is in an idling state.

The present invention provides a method and system arranged for control of at least one temperature T.sub.exhaust for an exhaust treatment system in a vehicle. The system comprises a first determination unit arranged for the determination of the at least one temperature T.sub.exhaust for the exhaust treatment system. The system also comprises a second determination unit arranged for the determination of an order of priority for the use of brakes in the vehicle. These brakes comprise at least the service brakes and the auxiliary brakes, the auxiliary brakes in turn comprising at least one engine fitted auxiliary brake, which is fitted in connection with an exhaust stream through the exhaust treatment system. The order of priority is determined based on the at least one temperature T.sub.exhaust. The system also comprises an utilization unit arranged for the use of the determined order of priority at braking of the vehicle.

A vehicle computer includes a memory and a processor programmed to execute instructions stored in the memory. The instructions include receiving a first tire pressure measurement at a first time, receiving a second tire pressure measurement at a second time, comparing the first tire pressure measurement to the second tire pressure measurement, and determining that a road is flooded based on a difference of the first tire pressure measurement and the second tire pressure measurement.

The present invention relates to a method for determining engine operation parameter values during and/or after a gear shift operation prior to performing said gear shift operation. The method comprises the steps of, prior to the gear shift operation: determining initial conditions comprising torque demand and engine speed and certain other engine operation parameter values; providing said initial conditions to an engine operation simulation model; providing a torque development course as well as an engine speed development course during the intended gear shift operation to said engine operation simulation model; and determining desired engine operation parameter values by means of said engine operation simulation model based upon the information thus provided to said engine operation simulation model.

A hybrid vehicle includes: an engine; a catalyst; a motor generator; and a drive control unit. The catalyst is provided in an exhaust path of the engine. The motor generator is coupled to the engine and capable of regenerating electric power. The drive control unit is configured to increase torque output from the engine and cause the motor generator to regenerate the electric power by using the torque output from the engine in the case where the hybrid vehicle is in a deceleration state and a temperature of the catalyst is lower than a specified catalyst activation temperature.

A system and method of stabilizing combustion in the engine of a hybrid electric vehicle. The system includes a controller controlling a starter and an injector, wherein the controller causes the starter to rotate the engine without fuel injection before starting the engine after an engine starting condition is satisfied or after an engine stop condition is satisfied and the engine is stopped.

An internal combustion engine of a series hybrid vehicle starts generating power when a catalyst temperature or a coolant temperature has decreased to an activation temperature or a lower limit water temperature, and stops generating power when the catalyst temperature or the coolant temperature reaches an operation end temperature. A target duration time of EV mode operation is set, and respective temperature decrease rates are used to set the operation end temperature so that a difference in temperature relative to the activation temperature will be ?TC-Ra?Tev, and to set the operation end temperature so that a difference in temperature relative to the lower limit water temperature will be ?TW=Rb?Tev.

A control device for a hybrid vehicle determines whether an EGR valve has an opening failure, and performs a pre-operation in which the engine is operated at a load smaller than a load in a series mode for a certain period of time while the vehicle is driven by a motor immediately before switching from an EV mode to the series mode. The pre-operation has a normal pre-mode in which the engine is operated at a first load when it is determined that the EGR valve does not have an opening failure, and a small failure pre-mode and a large failure pre-mode in which the engine is operated at a second load larger than the first load when it is determined that the EGR valve has the opening failure.