Patent application number | Description | Published |
20090044788 | ENGINE AIR BOOST SYSTEM - One implementation of an air boost system for an engine includes a boost device and an accumulator adapted to store pressurized fluid and selectively provide pressurized fluid to the boost device. A pump may deliver fluid under pressure to one or both of the accumulator and the boost device in at least some operating conditions. A first control valve may be disposed between the pump and the accumulator to control fluid flow to the accumulator, and a bypass may be provided between the pump and the first control valve. The bypass may, in at least some operating conditions, permit at least some of the pressurized fluid from the pump to bypass the accumulator and be delivered to the boost device. In one form, the accumulator is carried by the boost device in a compact unit. | 02-19-2009 |
20090062059 | Boosting assist hydraulic hybrid combination - A hydraulic hybrid system having an internal combustion engine and a hydraulic motor where the hydraulic hybrid system includes a boost device and at least one hydraulic storage device. The boost device is operatively connected to the internal combustion engine. The at least one hydraulic storage device is in operative fluid communication with the boost device and the hydraulic motor for selectively providing power by way of a controller to the hydraulic motor, the boost device, and the internal combustion engine under predetermined operator demand conditions. | 03-05-2009 |
20090132153 | CONTROLLING EXHAUST GAS RECIRCULATION IN A TURBOCHARGED COMPRESSION-IGNITION ENGINE SYSTEM - A method of controlling exhaust gas recirculation (EGR) in a turbocharged compression-ignition engine system including an engine, an induction subsystem in upstream communication with the engine, an exhaust subsystem in downstream communication with the engine, a high pressure EGR path between the exhaust and induction subsystems upstream of a turbocharger turbine and downstream of a turbocharger compressor, and a low pressure EGR path between the exhaust and induction subsystems downstream of the turbocharger turbine and upstream of the turbocharger compressor. A target total EGR fraction for compliance with exhaust emissions criteria is determined, then a target HP/LP EGR ratio is determined to optimize other engine system criteria within the constraints of the determined target total EGR fraction. | 05-21-2009 |
20100101226 | CONTROLLING EXHAUST GAS RECIRCULATION IN A TUROCHARGED COMPRESSION-IGNITION ENGINE SYSTEM - One embodiment of the invention may include a method of controlling exhaust gas recirculation (EGR) in a turbocharged compression-ignition engine system including a high pressure (HP) EGR path and a low pressure (LP) EGR path. The method may include determining a target total EGR fraction for compliance with exhaust emissions criteria, and determining a target HP/LP EGR ratio to optimize other engine system criteria within the constraints of the determined target total EGR fraction. The determining of the target HP/LP EGR ratio may include using at least engine speed and load as input to a base model to output a base EGR value, using at least one other engine system parameter as input to at least one adjustment model to output at least one EGR adjustment value, and adjusting the base EGR value with the at least one EGR adjustment value to generate at least one adjusted EGR value. | 04-29-2010 |
20100115944 | BOOST ASSIST DEVICE ENERGY CONSERVATION USING WINDMILLING - One embodiment includes windmilling a boost assist device by passing intake air through the boost assist device during operating modes where the device is not required to be operated (i.e., is not being actively powered). The windmilling effect will cause the boost assist device to rotate due to the windmilling effects of the air. This windmilling effect normally may not achieve full boost assist device operating speeds, but it will normally be sufficient to allow the boost assist device to avoid the high energy usage initial speed up phase of operation when the boost assist device is called upon to be actively powered. In one embodiment of the invention the windmilling conserves energy used to drive the boost assist device. | 05-13-2010 |
20110010079 | CONTROLLING EXHAUST GAS RECIRCULATION IN A TURBOCHARGED ENGINE SYSTEM - Methods and products for controlling exhaust gas recirculation. | 01-13-2011 |
20110088674 | CONTROLLING EXHAUST GAS RECIRCULATION THROUGH MULTIPLE PATHS IN A TURBOCHARGED ENGINE SYSTEM - A method of controlling exhaust gas recirculation (EGR) in a turbocharged engine system including multiple EGR paths to account for at least one of system constraints, or dead time and/or lag time associated with at least one of the EGR paths. | 04-21-2011 |
20110276204 | BOOST ASSIST SYSTEM - According to one implementation of an engine system, a power device is selectively actuated to provide energy to a storage device. Energy from the storage device is selectively provided to a boost assist device to supplement the normal energy supply to a boost device and enable an increased power output of the engine in at least certain engine or vehicle operating conditions. In one form, the power device may be a source of electrical energy and the storage device is capable of storing an electrical charge. In another form, the power device is a fluid pump and the storage device is capable of storing pressurized fluid. Various methods may be employed to control operation of the power device and energy storage in the storage device. | 11-10-2011 |
20120330575 | ESTIMATING ENGINE SYSTEM PARAMETERS BASED ON ENGINE CYLINDER PRESSURE - A method includes sensing pressure within an engine cylinder, and estimating at least one other engine system parameter based on the sensed pressure. Another method includes designing an engine system, which includes one or more engine cylinder pressure sensors and one or more other engine system sensors. According to this method, the engine system is operated, and engine cylinder pressure is sensed using the engine cylinder pressure sensors, which are in communication with an engine cylinder of an engine of the engine system. Also, other engine system parameters are sensed to obtain at least one other engine system parameter using the other engine system sensors. The engine cylinder pressure is correlated to the at least one other engine system parameter, and engine cylinder pressure is used to replace or augment the at least one other engine system parameter that correlates to the engine cylinder pressure. | 12-27-2012 |
20130306005 | CONTROL METHODS AND SYSTEMS FOR DUAL MODE COOLING PUMP - Methods and systems for controlling the operation of a dual mode engine accessory, such as a dual mode cooling pump. The dual mode device has two modes of operation, an electric motor operation and a mechanical pulley-driven operation. A friction clutch mechanism controlled by the control system is utilized to switch between the two modes of operation. The speed of the electrical motor can be changed to be substantially the same as, or changed in the direction of, the speed of the mechanical pulley-driven system. | 11-21-2013 |
20140196704 | TURBOCHARGER BOOST CONTROL USING EXHAUST PRESSURE ESTIMATED FROM ENGINE CYLINDER PRESSURE - Controlling turbocharger boost pressure using exhaust pressure estimated from engine cylinder pressure. | 07-17-2014 |
20140202427 | ENGINE SYSTEM CONTROL RESPONSIVE TO OXYGEN CONCENTRATION ESTIMATED FROM ENGINE CYLINDER PRESSURE - Methods of engine system control responsive to oxygen concentration estimated from engine cylinder pressure. | 07-24-2014 |