Class / Patent application number | Description | Number of patent applications / Date published |
123568190 | EGR valve position controlled only in relationship to intake throttle valve position | 13 |
20090056683 | Two Component Low Pressure Egr Module - An engine ( | 03-05-2009 |
20100224174 | EXHAUST GAS RECIRCULATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An exhaust gas recirculation system includes: a turbocharger ( | 09-09-2010 |
20100282222 | EXHAUST GAS RE-CIRCULATION CONTROL UNIT FOR A DIESEL ENGINE - 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 | 11-11-2010 |
20110083649 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - In an internal combustion engine which can switch the number of cylinders in operation between the total number of cylinders and some of the cylinders, an EGR rate at a time of a transitional operation can be kept correct at a time of any of a full cylinder operation and a partial cylinder operation. A throttle is operated to an opening degree corresponding to an accelerator operating amount and the number of cylinders in operation so that outputs with respective to the accelerator operating amount become equal at the time of the full cylinder operation and at the time of the partial cylinder operation. When the opening degree of the throttle is changed due to change in the accelerator operating amount, the opening degree of the EGR valve is changed at a relatively high speed at the time of the full cylinder operation, and the opening degree of the EGR valve is changed at a relatively low speed at the time of the partial cylinder operation. The opening degree of the EGR valve is preferably changed at a speed corresponding to a change speed of pressure in a surge tank. | 04-14-2011 |
20110146637 | EGR CONTROL IN HCCI ENGINES - An internal combustion engine operates in an unthrottled condition during HCCI operation while preferred combustion phasing is determined. An EGR mass flow rate is commanded to correspond with the preferred combustion phasing. The EGR valve is controlled to achieve commanded EGR mass flow rate. Position of the throttle valve is controlled to achieve commanded EGR mass flow rate when the commanded EGR mass flow rate exceeds control authority of the EGR valve. | 06-23-2011 |
20120227714 | Method and System for Humidity Sensor Diagnostics - Methods and systems are provided for an engine including a humidity sensor. Degradation of the humidity sensor may be determined based on a change in intake air relative humidity as compared to a change in intake air temperature or pressure, under selected conditions. An amount of exhaust gas recirculated to an engine intake is adjusted differently based on whether the humidity sensor is degraded or functional. | 09-13-2012 |
20120318246 | EGR CONTROLLER FOR INTERNAL COMBUSTION ENGINE - While an engine is an idling state and an EGR opening degree is increased stepwise from a specified opening degree, a variation in engine speed (a standard deviation in engine speed) is repeatedly computed. After that, a specified step amount is successively reduced from the EGR opening degree and the variation in engine speed is successively computed until the EGR opening degree becomes less than or equal to a specified value. Then, a maximum value of the EGR opening degrees where the variation in engine speed becomes minimum is learned as the full-close position. | 12-20-2012 |
20120318247 | EGR CONTROLLER FOR INTERNAL COMBUSTION ENGINE - A gas temperature sensor is provided in an EGR passage. When a specified learning executing condition is established, the EGR valve is compulsorily rotated from a reference position in a valve-close direction and then rotated in a valve-open direction over the reference position. While the EGR valve is rotated in such a manner as to pass a full-close position, an opening degree of the EGR valve at which the variation in gas temperature becomes minimum is learned as the full-close position of the EGR valve. | 12-20-2012 |
20130192568 | ENGINE CONTROLLING EMISSIONS DURING TRANSIENT OPERATIONS - A method of operating an engine is provided. Output of an engine speed sensor, a mass air flow sensor, an exhaust gas temperature sensor, and an engine torque estimator are monitored with an electronic control module. It is determined if the engine is operating in one of either a transient condition and a non-transient condition based upon output of at least one of the sensors and the torque estimator. Fuel injection timing is set based upon if the engine is operating in a transient condition. An exhaust gas recirculation valve position is set upon if the engine is operating in a transient condition. An intake throttle position is set based upon if the engine is operating in a transient condition. The fuel injection timing, exhaust gas recirculation valve position, and the intake throttle position are set to minimize NOx emissions when the engine is operating in a transient condition. | 08-01-2013 |
20130306042 | EXHAUST GAS RECIRCULATION SYSTEM AND CONTROL STRATEGY - A method for controlling a vehicle's exhaust gas recirculation system. The method controls the exhaust gas recirculation system in a manner that is suitable for a pedal tip-out transition while also being optimized for normal operating situations. | 11-21-2013 |
20140000573 | EQUIPMENT AND METHOD FOR CONTROLLING AIR SYSTEM OF DIESEL ENGINE | 01-02-2014 |
20140137844 | EXHAUST GAS RECIRCULATION APPARATUS FOR AN ENGINE - An EGR apparatus for an engine includes an EGR passage, an EGR valve, an accelerator sensor, and an ECU. The ECU compares a change amount (accelerator operating speed) per unit of time of an accelerator opening degree to a predetermined first determination value. When it is determined that a request for deceleration operation or acceleration operation is made to an engine, the ECU issues a fully closing command to the EGR valve. When it is determined that the deceleration or acceleration operation request is continued, the ECU continues to issue the fully closing command. When the deceleration or acceleration operation request is removed and the accelerator opening degree is larger or smaller than a predetermined second determination value, the ECU releases the fully closing command. | 05-22-2014 |
20140150759 | Engine Including External EGR System - An engine assembly includes an engine structure defining a combustion chamber. An intake system includes an intake manifold in communication with the combustion chamber. An exhaust system includes an exhaust conduit in communication with the combustion chamber. An exhaust gas recirculation system includes an EGR tube providing communication between the intake and exhaust systems, the EGR tube includes an end portion extending a distance into the intake system in a direction opposing air flow to the intake manifold. | 06-05-2014 |