| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123568290 | Vacuum actuator control of EGR valve | 7 |
| 20090301447 | Exhaust Gas Recirculation Valve - A system and method for controlling a multiple cylinder internal combustion engine include a mechanically operated exhaust gas recirculation valve having a spring-biased pintle with a surface area sized to generate a spring-opposing force to open a valve chamber entrance when an exhaust pressure differential exceeds a first threshold to allow exhaust gas to flow toward an intake and to close a valve chamber exit spaced from the chamber entrance to block exhaust gas flowing to the intake when the pressure differential exceeds a second threshold. The valve operates to limit or block external EGR flow at low load such as during starting and idle as well as at wide-open throttle while metering EGR flow for mid-to-high loads. | 12-10-2009 |
| 20090320811 | Exhaust Gas Recirculation Control System - An exhaust gas recirculation system has an EGR valve disposed in an EGR duct connecting an engine intake and exhaust. A diaphragm of said EGR valve is actuated via vacuum from the engine intake, the application of the vacuum is controlled via an electronic valve regulator (EVR). The EVR is provided a fixed signal to cause it to be fully open when it is determined that the engine is about to encounter a condition in which there is insufficient vacuum to open the EGR valve. The EVR is provided a variable signal during other operating conditions in which there is sufficient vacuum to open the EGR valve. | 12-31-2009 |
| 20100175671 | Method and Device for Improving a Recirculation of Exhaust Gas in an Internal Combustion Engine - A method and apparatus for improving recirculation of exhaust gas in an internal combustion engine having an exhaust-gas turbocharger, in particular in a diesel engine, determines operation parameters of the engine in order to determine exhaust gas pressures, supplies compressed air in a controlled manner based on the exhaust gas pressures in order to generate a vacuum in a supply section of a gas supply device, thereby inducting a partial quantity of exhaust gas from the engine into the supply section using the vacuum, and recirculates the partial quantity of exhaust gas into the engine via an induction line connected to the gas supply device. | 07-15-2010 |
| 20130269664 | EXHAUST GAS RECIRCULATION VALVE AND METHOD OF MANUFACTURING CAM THEREOF - An exhaust gas recirculation (EGR) valve with improved space efficiency, improved stability, and maximized driving force and a method of manufacturing cam thereof. The EGR includes a housing, a drive motor, and a power transmission unit connected to the drive motor to transmit power generated by the drive motor. The power transmission unit includes gears, a rotary shaft connected to one of the gears constituting the power transmission unit, an actuating cam connected to the rotary shaft to move in a rotational direction thereof, the actuating cam having a guide groove formed therein, and a valve member operatively connected to the actuating cam to selectively open and close an exhaust gas flow channel in the housing according to operation of the actuating cam. One end of the valve member contacts a top of the guide groove such that the valve member is operated simultaneously when the actuating cam rotates. | 10-17-2013 |
| 20140246001 | CIRCULATION VALVE FOR THE EXHAUST GASES OF AN ENGINE, IN PARTICULAR A MOTOR VEHICLE ENGINE - The invention relates to a circulation valve for the exhaust gases of an engine comprising a body ( | 09-04-2014 |
| 20140318514 | SYSTEM AND METHOD FOR GAS PURGE CONTROL - Systems and methods for providing vacuum to one or more of a crankcase ventilation system, an emission control system, and an exhaust gas recirculation (EGR) system included in a turbocharged engine system are provided. In one example, approach, a method comprises drawing vacuum from a vacuum source located in an intake of the engine downstream of a pre-compressor throttle and upstream of an intake throttle, and applying the drawn vacuum to a discharge outlet of a uni-directional crankcase ventilation system, where an inlet of the crankcase ventilation system is coupled to the intake of the engine upstream of the pre-compressor throttle. | 10-30-2014 |
| 20150013652 | METHOD AND SYSTEM FOR PRIORITIZING VEHICLE VACUUM - A vacuum prioritization system for a vehicle is disclosed. In one example, use and availability of vacuum provided via vacuum sources is allocated to higher priority vacuum operated actuators when a pressure in the vacuum system exceeds a threshold pressure. The lower priority vacuum operated actuators have access to vacuum supplied via the vacuum sources when pressure in the vacuum system is less than a threshold pressure. The approach may allow higher priority actuators to operate for an extended amount of time. | 01-15-2015 |
