A vehicle drive control device in a vehicle including an engine comprising a throttle valve and a supercharger with an air bypass valve changed from a closing side to an opening side when a closing speed of the throttle valve is higher than a speed determination value, the vehicle drive control device providing a torque-down control of the engine by operating the throttle valve to a closing side, wherein at the time of provision of the torque-down control of the engine in which the throttle valve is operated to the closing side when a rotation speed of the engine is equal to or greater than a predetermined rotation speed and a speed ratio of a torque converter is equal to or less than a predetermined value in a supercharged state, the throttle valve is caused to perform a closing operation at the closing speed lower than the speed determination value.

A method for diagnosing a combustion machine, wherein the combustion machine comprises at least one internal combustion engine and one intake air line via which fresh air can be fed to the internal combustion engine. In addition, at least one intake air compressor and, upstream from the intake air compressor, a control flap are integrated into the intake air line. In one operating state of the combustion machine, the control flap is closed so far that a negative pressure relative to the ambient pressure is produced by means of the running internal combustion engine in the portion of the intake air line that lies between the control flap and the internal combustion engine, with an actual value that is associated with this negative pressure being compared with a target value and the presence or absence of leakage in this portion of the intake air line being deduced from any difference that might exist between the actual value and the target value.

Proposed is a method and system for controlling an Exhaust Gas Recirculation (EGR) device in high-load driving, and an internal combustion engine vehicle including the system. The method of controlling an EGR device in high-load driving compares a ratio of pressures at a front end and a rear end of a throttle valve with a preset critical value that is a reference for determining high-load driving, performs Wide Open Throttle (WOT) control for fully opening the throttle valve when the ratio of pressures is larger than the preset critical value, determines whether engine torque due to the WOT control and use of EGR satisfies torque requested by a driver, and corrects throttle opening or stops use of EGR, depending on whether the engine torque due to use of EGR together with the WOT control satisfies the requested torque.

The speed of a turbocharger may be estimated using data from sensors that are readily available in most engine management systems. In some cases, a pressure measurement from a MAP sensor may be used, in combination with one or more computational models, to provide an efficient, lower cost estimate of turbo speed that can be used to control operation of the engine and/or the turbocharger.

An electronic control method for a throttle by an electronic control throttle device that controls the throttle while an electronic control unit generates a control signal based on an input data signal. The method may include calculating an engine rotation speed deviation from a difference between an engine rotation speed and an input engine rotation speed command, calculating an engine rotational acceleration based on the engine rotation speed, obtaining a proportional torque from a product of the engine rotation speed deviation and a predetermined coefficient, obtaining an integral torque by integrating a value obtained by subtracting a product of the engine rotational acceleration and the predetermined coefficient from the product of the engine rotation speed deviation and the predetermined coefficient, and generating a control signal for the throttle by using a sum of the proportional torque and the integral torque as a value of a torque command.

An intake air mass estimation unit is provided that sets predetermined degrees of crank angle to an angle that can divide an intake stroke into a plurality of sections, measures at every the predetermined degrees of crank angle the pressure downstream of the throttle valve and the time taken for the predetermined degrees of crank angle rotation, estimates the intake air mass flowing from the upstream to downstream of the throttle valve at every the predetermined degrees of crank angle, using the pressure downstream of the throttle valve and the time taken for the predetermined degrees of crank angle rotation measured at every the predetermined degrees of crank angle, and integrates the intake air mass at every the predetermined degrees of crank angle for 720 degrees of crank angle rotation, thereby estimating the intake air mass needed for one combustion.

A control device for an internal-combustion engine includes circuitry. The circuitry is configured to calculate, in accordance with an operating state of the internal-combustion engine, a basic supercharging pressure of intake gas generated by a supercharger provided in the internal-combustion engine. The circuitry is configured to acquire a flow rate change state parameter that correlates with a change state of the flow rate of the intake gas controlled by a flow rate control mechanism provided in the internal-combustion engine. The circuitry is configured to calculate a correction value in accordance with the flow rate change state parameter. The circuitry is configured to calculate an estimated supercharging pressure of the intake gas by correcting the basic supercharging pressure with the correction value. The circuitry is configured to control operation of the internal-combustion engine using the estimated supercharging pressure.

According to one embodiment, an apparatus for controlling fuel consumption in an internal combustion engine of a vehicle having a driver-actuated accelerator pedal includes an economy mode activation module and a standard fueling module. The economy mode activation module is configured to compare throttle input data with defined limits. The throttle input data is controllable by a driver of the vehicle via positioning of the accelerator pedal. The economy mode activation module is configured to control the fuel consumption of the internal combustion engine via an economy fuel map if the throttle input data falls within the defined limits for a defined amount of time. The standard fueling mode activation module is configured to control the fuel consumption of the internal combustion engine via a standard fuel map if the throttle input data does not fall within the defined limits for the defined amount of time.

A control system for a vehicular supercharger regulates the flow of a vacuum signal to a boost valve to modulate the supply of compressed air to an internal combustion engine. In one embodiment, the control system includes a solenoid that regulates the vacuum signal in response to one or more vehicle sensor signals inputted to an electronic controller.

A method for controlling an electronic throttle control (ETC) system, in which an electronic control unit (ECU) controls the ETC system using an air volume learning value containing information on a volume of air introduced into an engine for each opening degree of the ETC system according to carbon deposit of the ETC system, the method may include reading an air volume learning value used during a previous operation. The air volume learning value is compared to a preset learning value change reference value. Whether an operation condition of the engine satisfies a learning value change condition which is preset to change the air volume learning value, and whether the volume of air passing through the ETC system satisfies a preset learning-value-change-air-volume condition are determined. The air volume learning value used during the previous operation and stored in the ECU is substituted with a preset initial value of the air volume learning value.