摘要:
A system and method for using a sliding mode control algorithm to control flow rates from air handling actuators and fuel injectors of an internal combustion engine. The sliding mode control is based on an engine model that represents the engine in terms of pressure and oxygen content states of the intake and exhaust manifolds (as a linear term) and controllable flow rates (as a nonlinear term).
摘要:
A method of controlling an engine exhaust temperature and an exhaust mass flow rate for stationary regeneration of an engine exhaust gas particulate filter of an engine. The method implements a feed forward control that sets an EGR valve position and an injection timing associated with the engine, and a sets an engine speed. The method implements a feed back control that sets a turbo waste gate position and an intake throttle position associated with the engine.
摘要:
An apparatus for controlling a throttle opening degree of a diesel engine with a supercharger is disclosed. The apparatus includes an electronic control unit having functions of detecting section, a computing section, a correcting section, and a correction limiting/inhibiting section. The detecting section detects the atmospheric pressure, and the computing section computes an atmospheric pressure correction value with respect to the throttle opening degree based on the detected atmospheric pressure. The correcting section corrects the throttle opening degree in accordance with the atmospheric pressure correction value. When the degree of separation of an actual charging pressure from a target charging pressure in the supercharger is les than a predetermined value, the correction limiting/inhibiting section limits or inhibits correction of the throttle opening degree in accordance with the atmospheric pressure correction value.
摘要:
A system and method for using a sliding mode control algorithm to control flow rates from air handling actuators and fuel injectors of an internal combustion engine. The sliding mode control is based on an engine model that represents the engine in terms of pressure and oxygen content states of the intake and exhaust manifolds (as a linear term) and controllable flow rates (as a nonlinear term).
摘要:
An EGR control unit for enhancing the performance as to the EGR rate and the engine acceleration, the unit being configured so as to control the EGR valve and the intake air valve with a simple control command signal that makes both the valves be operated in a coupled mode, whereby the response performance as to the engine speed during acceleration as well as the EGR gas flow rate is enhanced by means of compensation regarding the dead zones inherent in the intake air throttle valve and the EGR valve. An EGR control unit including; a dead zone evaluating means 64 that calculates the estimation excess air ratio λ in consideration of the residual air in the EGR gas; thereby, it is judged that at least one of the EGR valve 27 and the intake air throttle valve 29 is operated in the dead zone based on the rate of change of the calculated estimation excess air ratio λ when the rate of change of the ratio λ is smaller than a prescribed level; and a dead zone compensating means 66 that makes the revisions regarding the opening command signals as to the EGR valve and the intake air throttle valve so that the dead zones do not hinder the coupled operation between the valves when the dead zone evaluating means judges that at least one of the EGR valve and the air throttle valve is operated in the dead zone, and the engine is under a transient response condition.
摘要:
A control device for an internal combustion engine (100) controls the internal combustion engine (100) that includes a first EGR device (51) that recirculates exhaust gas from a downstream side of a turbine (23b) to an upstream side of a compressor (23a), and a second EGR device (50) that recirculates exhaust gas from the upstream side of the turbine (23b) to the downstream side of the compressor (23a). EGR control device (7) performs such a control as to change the recirculation of exhaust gas from the recirculation of exhaust gas using the second EGR device (50) to the recirculation of exhaust gas using the first EGR device (51) when the idling-stop is to be executed.
摘要:
Provided is a control device for an internal combustion engine, which is provided to allow a throttle opening degree to be controlled in accordance with a target engine intake air flow quantity even during transitional operation. The actual cylinder intake air flow quantity calculating unit (21) calculates a response delay model for an intake system from a volumetric efficiency equivalent value (Kv) calculated from a rotational speed (Ne) of an engine (1) and an intake manifold pressure (Pim), an intake pipe volume (Vs), and a displacement (Vc) of each of cylinders (2), and calculates an actual cylinder intake air amount (Qcr) from an actual engine intake air amount (Qar) obtained from an air flow sensor (4) and the response delay model. The intake air flow quantity controlling unit (24) controls the throttle opening degree (TP) in accordance with the target engine intake air amount (Qat).
摘要:
A diesel engine system includes a diesel engine, a throttle valve, an EGR (Exhaust Gas Recirculation) path, an EGR valve and a controller. The throttle valve controls a flow rate of intake air to the diesel engine. Exhaust gas is recirculated along the EGR path from an exhaust port to an intake port of the diesel engine. The EGR valve controls a flow rate of the exhaust gas. The controller controls the throttle valve and the EGR valve such that an opening of the throttle valve decreases and an opening of the EGR valve increases when a load of the diesel engine increases. The controller controls the EGR valve such that the opening of the EGR valve increases after the opening of the EGR valve is held constant for a first predetermined holding time.
摘要:
A device for determining the mass flow via a tank venting valve for an internal combustion engine including an intake manifold and a throttle valve, the intake manifold being connected to the tank venting valve and an exhaust gas recirculation system, one measuring transducer each being assigned to the throttle valve and the tank venting valve, and a sensor for the mass flow via the exhaust gas recirculation system being assigned to the exhaust gas recirculation system. In order to be able to determine the mass flow via the tank venting valve with improved accuracy it is provided in such a device that a mass flow normalizer is assigned to the measuring transducers and to the sensor for the mass flow via the exhaust gas recirculation system; the mass flow normalizer picks up, sums, and normalizes the signals of the measuring transducers and the sensor assigned to the mass flows via the throttle valve, via the tank venting valve, and via the exhaust gas recirculation system; a convertor is assigned to the mass flow normalizer; the convertor calculates a virtual throttle valve angle from which an allocator determines the mass flow via the tank venting valve.
摘要:
The invention relates to a device for purifying exhaust gases from a combustion engine (1), comprising an arrangement (30) for recirculating exhaust gases from the engine to an air intake (2) thereof, a valve device (12) controlled by a control device (13) for regulating the relation between fresh air and recirculated exhaust gases supplied to the engine, and a regenerable filter (8) adapted to catch particulate constituents of the exhaust gases. The device further comprises means (14) for recording the temperature of the exhaust gases from the engine. The control device (13) is adapted to be supplied with temperature information from said temperature recording means (14), the control device (13) being adapted, with the aid of this temperature information and the valve device (12), to regulate the relation between fresh air and recirculated exhaust gases supplied to the engine so as to achieve a composition of the exhaust gases from the engine that is favourable with respect to the regeneration of the filter (8).