Class / Patent application number | Description | Number of patent applications / Date published |
123568140 | Internal exhaust gas recirculation (e.g., exhaust gas retained in the combustion chamber) | 15 |
20080264392 | Apparatus for an Internal Combustion Engine - An apparatus for achieving internal EGR in a four-stroke internal combustion engine which, for each cylinder, has at least one inlet valve and at least one exhaust valve for controlling the connection between combustion chambers in the cylinder and an inlet system and exhaust system respectively. A rotary camshaft with a cam curve is designed to interact with a follower member and has a first lobe portion for generating the normal exhaust valve lift of the engine. The camshaft is provided with a second lobe portion, which has a height measurement over and above its basic curve which falls short of the measurement for normal exhaust valve clearance when driving at low load and accompanying low heat development in the engine. As a result of thermal expansion in the valve mechanism, the height measurement exceeds the measurement for normal exhaust valve clearance when driving at high load and accompanying high heat development in the engine. The second lobe portion is situated within a crankshaft angular range of about 360-480 degrees. | 10-30-2008 |
20080264393 | Methods of Operating Low Emission High Performance Compression Ignition Engines - Methods of operating low emission high performance compression ignition engines. After an expansion stroke during which combustion occurred, a predetermined amount of exhaust gas is trapped in the combustion chamber during the next compression stroke, typically by closure of an exhaust valve. Then fuel is injected into the combustion chamber, the amount of exhaust gas trapped being limited so that that compression stroke does not cause compression ignition. Then typically near the end of the following expansion stoke, air is injected so that compression ignition occurs at or near the end of the next compression stoke. | 10-30-2008 |
20080283028 | Engine with internal EGR system - A 4-stroke cycle engine with EGR system equipped with a particulate filter, an external EGR system, and an exhaust valve sub-lift type internal EGR system is provided. With the engine, reduction of NOx emission by EGR can be achieved without incurring deterioration in engine durability by enabling operation of the engine with proper EGR rate all over the operating ranges of the engine through making it possible to compensate for reduction in EGR amounts due to reduced DPF pressure difference which occurs when recovering operation of the DPF is performed. | 11-20-2008 |
20090194080 | RESIDUAL BURNT GAS SCAVENGING METHOD WITH DOUBLE INTAKE VALVE LIFT IN A DIRECT-INJECTION SUPERCHARGED INTERNAL-COMBUSION ENGINE, NOTABLY OF DIESEL TYPE - The present invention relates to a method of scavenging residual burnt gas of a direct-injection internal-combustion engine, notably of diesel type, comprising at least one cylinder ( | 08-06-2009 |
20100043762 | METHOD FOR CONTROLLING THE EXHAUST GAS RECIRCULATION OF AN INTERNAL COMBUSTION ENGINE - For this method, a portion of the exhaust gas is recirculated from the exhaust train via an external line to the intake manifold and is mixed with the fresh air supplied to the cylinder, and a further portion of the exhaust gas is supplied once again through the valves internally to the combustion space of the engine. The internally recirculated amount of exhaust gas is adjusted by controlling the cam phases (VVT) as a function of the engine load and engine rpm. A target value (VVT_EGR_SP) for the internal recirculation rate of the exhaust gas is calculated as the difference between the target value (EGR_SP) of the recirculation of the exhaust gas and the external recirculation rate of the exhaust gas (EXT_EGR_RATE). | 02-25-2010 |
20100242930 | INTERNAL EGR CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE - There is provided an internal EGR control system for an internal combustion engine, which is capable of ensuring an excellent combustion state by properly controlling an internal EGR amount. The internal EGR control system is comprised of a variable valve operating mechanism | 09-30-2010 |
20100269801 | CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE - To provide a control system for an internal combustion engine, which is capable of providing a stable intake air amount through reduction of pumping loss and blow-back of combustion gases by appropriately controlling the valve-opening timing of the intake valves, and thereby being capable of securing excellent drivability. In the control system | 10-28-2010 |
20110023844 | ENGINE EXHAUST VALVE TIMING AND LIFT SYSTEM FOR A TWO-STROKE LOCOMOTIVE DIESEL ENGINE HAVING AN EGR SYSTEM - The present invention is directed to an engine exhaust valve timing and lift system for a uniflow two-stroke locomotive diesel engine having an EGR system. This system and method reduces NO | 02-03-2011 |
20140000572 | INTERNAL EGR AMOUNT CALCULATION DEVICE FOR INTERNAL COMBUSTION ENGINE | 01-02-2014 |
20140007854 | INTERNAL EGR AMOUNT CALCULATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An internal EGR amount calculation device for an internal combustion engine, which is capable of properly and easily calculating an internal EGR amount according to the change in the valve timing and enhancing the calculation accuracy of the internal EGR amount. The device includes an ECU. The ECU calculates an amount of burned gases remaining in a cylinder when the valve timing is predetermined reference timing, as a reference internal EGR amount. The ECU calculates a change in the amount of burned gases flowing into or out of the cylinder with respect to the amount of burned gases flowing into or out of the cylinder when the valve timing is the predetermined reference timing, as an internal EGR increase/decrease amount. Then, the ECU calculates the internal EGR amount by adding the internal EGR increase/decrease amount to the reference internal EGR amount. | 01-09-2014 |
20140144414 | METHOD FOR CONTROLLING EXHAUST GAS RE-CIRCULATION SYSTEM IN AN INTERNAL COMBUSTION ENGINE - A method for controlling re-circulation of exhaust gas (EGR) in an internal combustion engine includes receiving a signal indicative of an engine operating temperature and comparing the engine operating temperature to a first predetermined IEGR threshold. When the engine operating temperature is less than the first predetermined internal EGR threshold, a first internal EGR mode is activated, whereby engine emissions may be reduced or combustion stability may be enhanced. When the engine operating temperature is greater than the first predetermined internal EGR threshold, the first internal EGR mode is deactivated, and a second internal EGR mode is activated, whereby emissions may be reduced as exhaust system heating is accelerated. When the operating temperature is greater than the second temperature threshold, the second internal EGR mode may be deactivated a third mode may be enabled with only external EGR. | 05-29-2014 |
20140283800 | MIXED-MODE COMBUSTION CONTROL - Methods and systems are described for controlling engine combustion during a mixed-mode combustion modality. A target exhaust valve timing is determined based on a first combination of engine speed and load. An amount of trapped residual in an engine cylinder after an exhaust valve is closed during a first combustion cycle is also determined. Based at least in part on the amount of trapped residual, an amount of gas that will be drawn into the engine cylinder when the intake valve is opened during a second combustion cycle is determined. The target exhaust valve timing is then adjusted during the second combustion cycle in order to adjust the amount of gas that will be drawn into the engine cylinder when the intake valve is opened during a third combustion cycle. | 09-25-2014 |
20150007800 | PULSE SEPARATED DIRECT INLET AXIAL AUTOMOTIVE TURBINE - Systems and methods for operating a turbocharged engine are described. In one example, a system comprises a cylinder head having a first and second exhaust duct separately coupled to first and second groups of cylinders, each of the first and second exhaust ducts leading to an exhaust driven turbine mounted inside the cylinder head on a bearing, the bearing located within a bearing housing supported by the cylinder head. In this way, exhaust pulses remain separate up to the turbine mounted inside the cylinder head. | 01-08-2015 |
20150040876 | EARLY EXHAUST VALVE OPENING FOR IMPROVED CATALYST LIGHT OFF - Energy to speed heating of a catalyst associated with an internal combustion engine can be provided in the form of sensible energy (heat) via hot combustion products. In some variations, timing of opening and/or closing of an exhaust valve can be manipulated to increase sensible heat delivered to the catalyst in the exhaust gases. | 02-12-2015 |
20150136096 | INTERNAL COMBUSTION ENGINE - When a blow-by gas collides with an outer circumferential wall of a tubular member, part of oil mist in the collision gas is liquefied (an oil droplet). The oil droplet takes in the oil mist in the blow-by gas which flows into an intake pipe in succession, and moves on the outer circumferential wall of the tubular member in accordance with a flow of an intake gas and the gravity while keeping a liquefied state. The oil droplet flows in from an inlet section while keeping the liquefied state, and uniformly flows into a surface of an impeller to be discharged to a scroll side. A surface of a diffuser is washed uniformly by the oil droplet keeping the liquefied state, and generation or accumulation of the deposit on the surface can be restrained. | 05-21-2015 |