| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123568200 | Plural EGR valves in the recirculation passage | 15 |
| 20080257316 | DUAL EXHAUST GAS RECIRCULATION VALVE - An exhaust gas recirculation (EGR) system communicates hot exhaust gases from an exhaust manifold to an intake manifold through a first passage and a second passage parallel with the first passage. A first EGR valve assembly controls exhaust gas flow through the first passage and a second EGR valve assembly controls exhaust gas flow through the second passage. Exhaust gas is selectively flowed through one or both of the first and second passages to provide the desired temperature and flow through the intake manifold to the engine. | 10-23-2008 |
| 20100163006 | EXHAUST GAS RECIRCULATION APPARATUS - An EGR control device is provided in a branched-off pipe portion of a recirculation pipe unit. The EGR control valve is opened during an exhaust gas recirculation period, which is a part of a valve-opening period of an intake valve, so that exhaust gas is re-circulated into a combustion chamber during the exhaust gas recirculation period. As a result, swirl flow of the re-circulated exhaust gas to be formed in the combustion chamber is increased to improve ignitionability and to facilitate combustion of air-fuel mixture. | 07-01-2010 |
| 20110023838 | Valve Arrangement for an Exhaust Gas Recirculation Device - A valve arrangement is provided for an exhaust gas recirculation device of an internal-combustion engine. The engine has at least one inlet and at least one outlet. The recirculation device includes an inlet on the internal-combustion engine outlet side, an outlet on the internal-combustion engine inlet side, and several, particularly two flow paths extending between the inlet and the outlet and being parallel at least in areas. The valve arrangement has a first control element and a second control element for automatically regulating/controlling fluid flow flowing between the inlet and the outlet and automatically regulating/controlling the distribution of this fluid flow between the several flow paths. A common actuator is provided for operating the first control element as well as the second control element. | 02-03-2011 |
| 20110180048 | METHOD FOR MANAGING THE EXHAUST GAS CIRCULATION CIRCUIT OF A PETROL THERMAL ENGINE AND CORRESPONDING RECIRCULATION SYSTEM - The invention relates to a method for managing an exhaust gas recirculation circuit of a petrol thermal engine, the engine including at least one combustion chamber connected to an inlet line and an exhaust line between which extends said recirculation circuit, the recirculation circuit including a flow-rate adjustment valve, wherein said method comprises the step of adjusting flow-rate adjustment valve based on a flow-rate setpoint, said method further comprising the steps of: detecting an operation parameter representative of a pressure difference between an upstream pressure and a downstream pressure relative to the flow-rate adjustment valve, and, after comparing the parameter with a threshold corresponding to a minimum pressure difference, adjusting the flow-rate in at least one of the lines in order to increase the pressure difference. | 07-28-2011 |
| 20110290223 | COOLED EGR SYSTEM FOR COOLANT HEATING DURING COLD ENGINE START - Various systems and method for heating an engine in a vehicle during a cold start are described. In one example, thermal efficiency of the engine is improved by heating engine coolant via a high-pressure exhaust gas recirculation (HP-EGR) system. For example, after light-off of an exhaust catalyst, exhaust gas is routed through the HP-EGR system which includes a HP-EGR cooler. Heat from the exhaust gas is then used to warm the engine coolant via the HP-EGR cooler. | 12-01-2011 |
| 20120145134 | EXHAUST GAS RECIRCULATION SYSTEM - An exhaust gas recirculation system includes a housing, first and second valves, an actuator, a cam member coupled with the first valve to be in synchronization therewith and receiving power of the actuator to rotate, and a link member coupled with the second valve to be in synchronization therewith and receiving power of the actuator through the cam member to rotate. The cam member includes a cam groove, an open end part formed on one end side of the groove in its formation direction and opening outward of the cam member, and an overlapping part overlapping with the actuator. The link member is driven to rotate along the groove in synchronization with rotation of the cam member. The link member includes a roller guided along the groove. | 06-14-2012 |
| 20120260897 | Internal Combustion Engine - An internal combustion engine comprises a working cylinder, an EGR cylinder, an intake system for supplying a combustion air charge to the cylinders, a first exhaust system for removing exhaust gas from the working cylinder and to the atmosphere, a second exhaust system for removing exhaust from the EGR cylinder and supplying the exhaust gas through an EGR supply conduit to the intake system, an EGR bypass conduit extending between and fluidly connecting the EGR supply conduit and the first exhaust treatment system, a first valve assembly disposed in the EGR supply conduit between the intake system and an inlet of the EGR bypass conduit and a second valve assembly disposed in the EGR bypass conduit. | 10-18-2012 |
| 20130000614 | SYSTEMS AND METHODS FOR CONTROLLING EXHAUST GAS RECIRCULATION - Exhaust gas recirculation (EGR) systems and methods are provided. In one embodiment, a method for controlling an engine includes providing a first EGR gas flow to an intake manifold of the engine by closing a first EGR valve or a second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve, wherein the first and second EGR valves are respectively positioned in first and second EGR passages respectively coupled between first and second donor cylinder groups and an intake manifold, and providing a second EGR gas flow that is higher than the first EGR gas flow to the intake manifold by fully opening the first EGR valve or the second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve. | 01-03-2013 |
| 20130025575 | METHOD FOR CONTROLLING AN EGR CIRCUIT OF A MOTOR VEHICLE ENGINE, VALVE FOR IMPLEMENTING SAID METHOD, AND ENGINE HAVING SAID VALVE - The invention relates to a method for controlling an exhaust gas recirculation circuit ( | 01-31-2013 |
| 20130139793 | EXHAUST GAS PROCESSING DEVICE - An exhaust gas treatment system includes: confirming that an engine stops operation; sensing present pressure difference between front and rear sides of an EGR value; setting learning value by performing large offset learning, if the present pressure difference exceeds an absolute value of a first lower or upper values; setting learning value by performing step learning, if the present pressure difference exists between first and second lower values that is larger than the first lower value or the present pressure difference a between first and second upper values that is smaller than the first upper value; and setting the present pressure difference value as a learning value, if the present pressure difference exists between the second lower and second upper values. The exhaust gas treatment method accurately learns the pressure difference of the EGR system to improve the quality of the exhaust gas and securely control the EGR system. | 06-06-2013 |
| 20130186376 | METHODS AND SYSTEMS FOR EXHAUST GAS RECIRCULATION - Various methods and systems are provided for diagnosing an engine component condition in an exhaust gas recirculation system. In one example, a method includes selectively routing exhaust from a subset of engine cylinders to an exhaust passage via a first valve and to an intake passage via a second valve, and obtaining one or more of a pressure or temperature from the subset of engine cylinders. The method further includes indicating an engine component condition based on the one or more of the pressure or temperature. | 07-25-2013 |
| 20140190458 | EGR Rate Control For Internal Combustion Engine With Dual Exhaust-Ported Cylinders - A method of using exhaust gas recirculation (EGR) in an internal combustion engine. At least two of the cylinders are “dual exhaust-ported cylinders” having two exhaust ports. For each of these cylinders, one of the exhaust ports is connected to the EGR loop and the other of the exhaust ports is connected to the main exhaust line. These cylinders are controlled such that one exhaust port is open and the other exhaust port is closed during each engine cycle, and are operated, on a cycle-by-cycle basis so that all of the exhaust produced by a cylinder may be delivered to the EGR loop at any cycle. The number of cylinders operating as EGR cylinders per engine cycle is in response to a desired EGR rate. | 07-10-2014 |
| 20140366851 | METHOD FOR CONTROLLING AN EGR CIRCUIT OF A MOTOR VEHICLE ENGINE, VALVE FOR IMPLEMENTING SAID METHOD, AND ENGINE HAVING SAID VALVE - A three-way valve configured to provide the connection between a gas intake circuit and an exhaust gas recirculation circuit is disclosed. The valve includes a first shutter for regulating the airflow rate, a second shutter for regulating the recirculated exhaust gas flow rate, a single motor for driving the two shutters, and gearing connecting the motor to at least one shutter. The gearing includes functionality to drive the at least one shutter. | 12-18-2014 |
| 20150083095 | INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREFOR - An internal combustion engine includes an Exhaust Gas Recirculation (EGR) system having an EGR valve and a reed valve in an EGR passage, and a control device that expresses a relationship between an opening degree of the EGR valve and a mass flow rate of an EGR gas by using a first volume flow rate of the EGR gas that can be expressed by using an isentropic flow equation of a nozzle of the EGR valve and a second volume flow rate of the EGR gas pumped out by the reed valve. Even if the reed valve (check valve) is provided in the EGR passage, the mass flow rate of the EGR gas can be calculated accurately. | 03-26-2015 |
| 20160160811 | METHOD AND SYSTEMS FOR EXHAUST GAS CONTROL - Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount. | 06-09-2016 |
