A system and method for controlling a hybrid vehicle having an engine, first and second electric machines coupled to a traction battery and configured to operate primarily as a motor and a generator, respectively, and a controller in communication with the engine and the first and second electric machines include increasing target engine speed from a sea level speed to deliver a demanded engine power at altitude up to an NVH engine speed limit. The system and method may reduce the demanded engine power based on an attainable engine power associated with the NVH engine speed limit. A demanded wheel power may be reduced in response to the reduced engine power.

A method of testing an automotive vehicle estimates acceleration for multiple time windows. Each of the time windows has a different length. A speed of the vehicle is measured. The acceleration vector is estimated, for the time windows, as a function of the speed and a test speed. A target acceleration is calculated by multiplying the acceleration vector by a driving mode vector. A target speed, of a driver model, is set as a function of a test cycle, the target acceleration, and the speed. The vehicle is controlled at the target speed.

A vehicle coasting control system for a vehicle having a prime mover includes an accelerator pedal positional throughout an accelerator pedal position range; a vehicle controller interfacing with the accelerator pedal, the vehicle controller adapted to control operating speeds of the prime mover of the vehicle corresponding to positions, respectively, of the accelerator pedal within the accelerator pedal position range; and the vehicle controller is adapted to operate the prime mover at idle when the accelerator pedal is positioned at a coast zone within the accelerator pedal position range. A vehicle coasting control method is also disclosed.

The present invention provides a novel combination of devices to measure and transmit to an electronic controller data pertaining to differential pressures, temperatures, regeneration status, exhaust content, accumulated gas consumption and substitute fuel consumption. The electronic controller compares the data to thresholds; when the controller receives signals indicating these thresholds or limits are met, the controller causes the gas substitution rate to be diminished or set to zero until after-treatments elements are fully regenerated thereby facilitating integration of a mixed fuel system with an application internal combustion engine.

An ECU changes driving force characteristics in accordance with a changeover in mode, such that the vehicle driving torque for the same vehicle speed and the same accelerator opening degree becomes larger during a CD mode than during a CS mode. In changing the driving force characteristics in accordance with the changeover in mode, the ECU executes a slow change process such that the vehicle driving torque approaches a value after the changeover in mode from a value before the changeover in mode as time passes. In this slow change process, the speed of change in the vehicle driving torque in the slow change process is more strictly limited when the changeover in mode is made based on host vehicle position information than when the changeover in mode is made in accordance with the operation of a mode switch.

The present invention provides a compact throttle valve device with good valve responsiveness and small unnecessary vibrations, an engine, and a vehicle. A slotless brushless motor-driven throttle valve device has a throttle body provided with a tubular portion in which an intake air passage is formed, a throttle valve disposed in the tubular portion, and a slotless brushless motor serving as a drive motor for performing opening/closing drive for the throttle valve. The throttle body housing has a hole portion into which a fixing member for fixing the throttle body to a member to be attached is inserted. The hole portion is formed in the vicinity of the outer circumferential portion of the tubular portion. The compact, narrow slotless brushless motor is disposed near the hole portion formed in the throttle body, and the throttle valve device is very compact.

Methods and systems are provided for operating a branched exhaust assembly in a vehicle engine in order to increase catalyst efficiency and reduce engine emissions. In one example, a method may include, during a cold-start condition, flowing exhaust first through a three-way catalyst then through an underbody converter and then through a turbine, each exhaust component housed on different branches on the branched exhaust assembly. After catalyst activation, exhaust may flow first through the turbine, then through the underbody converter and then through the three-way catalyst, and during high engine load, exhaust may simultaneously flow through two branches of the branched exhaust assembly, partially bypassing the turbine.

A method for controlling a forced induction engine includes: determining a first air pressure upstream of an air compressor, the air compressor supplying compressed air to the engine; determining a second air pressure downstream of the air compressor; determining a limit air flow rate to the engine corresponding to the surge limit of the air compressor based at least in part on the first and second air pressures; and controlling a throttle valve actuator to position the throttle valve at a position providing an air flow rate that is greater than or equal to the limit air flow rate. A vehicle power pack having a control unit implementing the method and a vehicle having the vehicle power pack are also disclosed.

The invention relates to an engine control valve (1) which comprises a rotatable actuator (7), a valve (5), and a movement transformation device (9) suitable for transforming the rotation of the actuator (7) into translation of the valve (5). The movement transmission device (9) comprises a helical link with uniform pitch for translating the valve (5).

Transmission shocks and idling defects such as engine racing and rough idling due to aging of a throttle opening area are prevented from occurring. An internal combustion engine control apparatus for controlling an internal combustion engine that has an air flow rate sensor for measuring a rate of air represented as an actual air rate, the air flowing into a cylinder, and a throttle valve for adjusting the rate of air, includes a throttle valve controlling section for controlling a throttle opening of the throttle valve to reach a preset throttle opening set depending on a target air rate for realizing a demand torque, and a throttle opening correcting section for correcting the preset throttle opening on the basis of the target air rate upon fuel cutoff that stops a fuel from being supplied to the internal combustion engine and of an actual air rate measured by the air flow rate sensor.