An exhaust purification system including a NOx catalyst 32 provided in an exhaust passage of an internal combustion engine 10 and purifying NOx in exhaust; a MAF sensor 40 for acquiring an air flow-rate of the internal-combustion engine 10; a control unit 60, 70 that execute catalyst regeneration treatment of recovering a NOx purification ability of the NOx catalyst 32 by performing, in combination, air-based control of reducing air flow-rate of the internal-combustion engine 10 to a predetermined target air flow-rate and injection-based control of increasing a fuel injection amount, wherein, in a case of executing the catalyst regeneration treatment, the control unit 60, 70 starts with the air-based control and starts the injection-based control when the air flow-rate acquired by the MAF sensor 40 is reduced to the target air flow-rate.

A vehicle speed control apparatus of an industrial vehicle has a controller that determines a target engine speed by PI control based on a deviation between a target vehicle speed and an actual vehicle speed. The controller controls an upper limit of the target engine speed according to an actual engine speed.

A method and system for controlling a hybrid vehicle equipped with an air control valve are provided. The method includes collecting road information and determining a number of conversions between an engine operation mode and a motor driving mode based on the collected road information. Further, a degree of flap closing of the air control valve is restricted from being corrected when the predicted number of conversion is less than a predetermined threshold. The air control valve is adjusted for flap displacement upon closing of the flap when the predicted number of conversion is greater than the predetermined threshold and in which the degree of flap closing of the air control valve is corrected based on the detected flap displacement.

A transport refrigeration system is provided including a refrigeration unit and a diesel engine powering the refrigeration unit. The diesel engine has an exhaust system for discharging engine exhaust from the diesel engine. An exhaust treatment unit is disposed in the diesel engine exhaust system and includes a diesel oxidation catalyst. An air control valve is configured to control a quantity of air provided to the diesel engine from an air supply fluidly coupled to the diesel engine. A controller is operably coupled to the air control valve and is configured to automatically operate the air control valve to initiate a cleaning cycle of the diesel oxidation catalyst upon detection of a predetermined condition.

A method for controlling a vehicle including an exhaust aftertreatment system for purifying exhaust gases from a compression-ignition engine includes monitoring vehicle operating parameters, determining whether the vehicle is stopped, determining whether the engine is commanded off, and determining whether the exhaust aftertreatment device is at a predetermined operating temperature. When the vehicle is stopped, the engine is commanded off and the exhaust aftertreatment device is at the predetermined operating temperature the engine is controlled in a run-on state for a predetermined period of time. The run-on state includes operating the engine in a throttled and fueled state.

The density of fuel being used by a compression-ignition engine and the flammability of the fuel (readiness to ignite when injected into a combustion chamber of the engine, under the current operating conditions of the engine) are respectively detected. When the flammability is excessively low and the density is above a threshold value, the oxygen concentration of the intake air supplied to the cylinders is increased until the flammability reaches a reference condition, while when the flammability is excessively low and the density is below the threshold value, the compression ratio of the engine (and/or each pilot injection amount) is increased until the flammability reaches the reference condition.

A method for controlling a vehicle including an exhaust aftertreatment system for purifying exhaust gases from a compression-ignition engine includes monitoring vehicle operating parameters, determining whether the vehicle is stopped, determining whether the engine is commanded off, and determining whether the exhaust aftertreatment device is at a predetermined operating temperature. When the vehicle is stopped, the engine is commanded off and the exhaust aftertreatment device is at the predetermined operating temperature the engine is controlled in a run-on state for a predetermined period of time. The run-on state includes operating the engine in a throttled and fueled state.

A method for controlling an air control valve in a diesel hybrid vehicle includes an engine stop detection step for detecting whether a diesel engine is stopped and a vehicle speed is less than a predetermined speed, a first noise and vibration blockade step for controlling a throttle valve to be closed when the diesel engine is stopped and the vehicle speed is less than the predetermined speed, and a first throttle valve control step for closing and then opening again the throttle valve for a predetermined time.

A method for diagnosing a component in a gas-routing system of a supercharged combustion engine having an electrically operable compressor, the method including activating the electrically operable compressor after the combustion engine has been shut off, opening a flow path through the gas-routing system, measuring a state variable in the gas-routing system, and detecting a fault of the component as a function of the measured state variable.

An air intake shut-off valve comprising a valve housing, a pivot shaft, an actuator shaft, a valve disk, a solenoid having a trip rod, a service port cover, an air inlet and an air outlet is disclosed. A first end of the pivot shaft has an L shaped notch in the first end and a second end attaches to the valve disk. The pivot shaft rotates about the actuator shaft from a first position to a second position. A first end of the trip rod extends through the valve housing and engages the L shaped notch in the first position and the first end of the trip rod disengages from the L shaped notch in the second position. The valve disk covers the air outlet in the second position. A method of the using the air intake shut-off valve is also discussed.