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12 results about "Indirect injection" patented technology
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Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. In the last decade, gasoline engines equipped with indirect injection systems, wherein a fuel injector delivers the fuel at some point before the intake valve, have mostly fallen out of favor to direct injection. However, certain manufacturers such as Volkswagen and Toyota have developed a 'dual injection' system, combining direct injectors with port (indirect) injectors, combining the benefits of both types of fuel injection. Direct injection allows the fuel to be precisely metered into the combustion chamber under high pressure which can lead to greater power, fuel efficiency. The issue with direct injection is that it typically leads to greater amounts of particulate matter and with the fuel no longer contacting the intake valves, carbon can accumulate on the intake valves over time. Adding indirect injection keeps fuel spraying on the intake valves, reducing or eliminating the carbon accumulation on intake valves and in low load conditions, indirect injection allows for better fuel-air mixing. This system is mainly used in higher cost models due to the added expense and complexity.
Method for operating an indirect injection gaseous fuel engine
ActiveGB2639199BElectrical controlInternal combustion piston enginesFresh airInternal combustion engine
A method for controlling indirect injections for a hydrogen powered internal combustion engine comprises determining a fuel demand QD from an input torque demand TD; determining 18 an initial fresh ai
Owner:PHINIA DELPHI LUXEMBOURG SARL
Method for estimating pressure in an intake manifold
The present invention relates to a method for estimating the pressure in an intake manifold of an indirect injection combustion engine, comprising: a pressure sensor measuring the pressure in the intake manifold, the intake manifold being in fluid communication with a combustion cylinder in which a piston is guided in translation and connected to a rotating crankshaft. The method comprises the following steps: measuring, by the pressure sensor, a maximum pressure value substantially corresponding to the maximum pressure in the intake manifold during a previous engine cycle; measuring, by the pressure sensor, a minimum pressure value substantially corresponding to the minimum pressure in the intake manifold during a previous engine cycle; determining, based on the crankshaft angular position and the engine speed, a precalculated average correction factor for the pressure; and estimating, based on the average correction factor and the minimum and maximum pressure values, the pressure in the intake manifold for the crankshaft angular position of the current engine cycle.
Owner:VTESCO TECH GMBH
Method for operating an indirect injection gaseous fuel engine
A method for controlling indirect injections for a hydrogen powered internal combustion engine comprises determining a fuel demand QD from an input torque demand TD; determining 18 an initial fresh ai
Owner:PHINIA DELPHI LUXEMBOURG SARL
Method for operating an indirect injection gaseous fuel engine
PCT designated stageWO2025190739A1Electrical controlInternal combustion piston enginesMixed flowInlet valve
The invention relates to a method for controlling indirect injections for a hydrogen powered internal combustion engine. The method comprising the steps of: • - determining a fuel demand Q p from an input torque demand T D; • - determining an initial fresh air flow M F, k based on a previous specific gas constant R mixing, kJ; • - determining a fast lambda value λ Fast based on the initial fresh air flow M F, k, • - determining an updated specific gas constant R mixing, k+i based on the fast lambda λ Fast ' • - determining a updated fresh air flow M F, k+1 based on the updated specific gas constant R mixing, k+ 1J • - determining a fuel quantity Q F based on the updated fresh air flow M F, k+1; • - performing an injection event by injecting said fuel quantity into an engine cylinder. The invention takes into account the mixed flow of air and hydrogen admitted into the cylinder via the inlet valves in case of indirect injection, the proportion of which is given by the lambda value A. The method uses a specific gas constant R of this mixing, which is defined by the following formula:
Owner:PHINIA DELPHI LUXEMBOURG SARL
Powertrain provided with optimized LPG injection system
The invention relates to a powertrain (1) with indirect LPG injection, comprising a cylinder crankcase (2) on which is mounted a cylinder head (3) comprising at least two intake ducts (4) each leading into a cylinder (8); the powertrain comprises at least two LPG intake manifolds leading into an intake duct (4). According to the invention, the free end of each intake manifold (25, 26, 27, 28, 29) is placed within the intake duct (4) through which LPG is released, and the free end comprises dispersion means (30, 35, 39) for releasing LPG within a larger area of the intake duct (4), the size of which is larger than the size of the cross-section of the intake manifold (25, 26, 27, 28, 29).
Owner:HORSE POWERTRAIN SOLUTIONS S L U
Process for converting diesel thermal vehicles to a dual-fuel gas version with a restricted mode
ActiveFR3160209A3Electrical controlInternal combustion piston enginesEngine powerMechanical engineering
Method for converting diesel thermal vehicles to a dual-fuel gas version with a restricted mode. The invention relates to the field of converting thermal vehicles to a dual-fuel gas version in the case of diesel engine vehicles. It comprises the addition in the passenger compartment of a fuel selection switch either in 100% diesel mode or in mode with a proportion of gaseous fuel in indirect injection into the intake and a proportion of diesel fuel in proportions depending on the operating conditions, and in 100% diesel mode the engine power is restricted by at least 20% so as to reduce emissions regardless of the choice made by the user of the vehicle. Figure to be published with the abstract: Fig. 1.
Owner:HERBAULT PATRICK
Engine control method using gas fuel in cold start stage
PendingCN121889572AElectrical controlInternal combustion piston enginesEngine efficiencyPollutant emissions
The invention relates to a method for the post-start control of a spark-ignited internal combustion engine (10) of a motor vehicle, said engine being equipped with a system (40) for controlling pollutant emissions comprising at least one three-way catalyst (42a), comprising: a dual-fuel phase carried out when the catalyst temperature is less than or equal to a predetermined minimum catalyst start-up temperature, wherein advanced indirect injection of a large dose of gas fuel is matched with single delayed direct injection of a small dose of liquid fuel, and the ignition advance angle of the engine is delayed relative to the optimal ignition advance angle which maximizes the efficiency of the engine; a single fuel phase when the temperature of the catalyst (42a) exceeds said start-up temperature, wherein the energy required for engine operation mode is provided by indirect injection of gaseous fuel.
Owner:HORSE POWERTRAIN SOLUTIONS S L U
Low pressure fuel injector
PCT designated stageWO2026109968A1Internal combustion piston enginesFuel supply apparatusCircular discIndirect injection
A low pressure fuel injector (1) for indirect injection of fuel into an intake manifold of an internal combustion engine, the injector having: - a body (3), - at least one opening (12), passing, along the lateral surface of the body (3) for the supply of fuel to the injector (1), - a disc (4) provided with an opening (4a), passing, in an axial direction, for the exit of fuel, - a movable element or armature (6) of the injector (1) sealed on the disc (4), in conditions of non-injection, and configured to open inwards, by axial sliding, in conditions of fuel injection, - a power unit (10) for the operation of the armature (6), comprising at least the ferromagnetic core (7), - an elastic calibration element (9), to ensure the seal of the mobile element (6) on the disc (4) in conditions of absence of injection, wherein between a radially external cylindrical surface (6c) of the armature (6) and a radially internal cylindrical surface (3c) of the body (3) there is an annular meatus (g).
Owner:DUMAREY FLOWMOTION TECH SRL
Drive system for a motor vehicle, method for operating
The invention relates to a drive device (1) for a motor vehicle, with a hydrogen combustion engine (2), in particular a reciprocating piston engine or rotary piston engine, which has at least one combustion chamber (10) to which a first injection valve (12) for the direct or indirect injection of hydrogen and a first ignition device (11) are assigned, with a supply system (13) with a high-pressure line (17) for supplying the hydrogen, wherein the first injection valve (12) is connected to the high-pressure line (17), and with an exhaust aftertreatment system (21) which is connected downstream of the combustion chamber (10) and has at least one exhaust aftertreatment device (22-24), in particular a catalyst or filter.The exhaust aftertreatment system (21) is provided to have an exhaust gas burner (30) with a combustion chamber (25) to which a second injection valve (26) and a second ignition device (27) are assigned, wherein the second injection valve (26) is connected to the high pressure line (17).
Owner:ROBERT BOSCH GMBH
Methods and uses relating to fuel compositions
A method of cleaning up deposits in an indirect injection diesel engine, the method including combusting in the engine a diesel fuel composition having a quaternary ammonium salt additive; and optionally one or more further nitrogen-containing detergents; wherein the quaternary ammonium salt additive comprises the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which includes a tertiary amine group; wherein each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.
Owner:INNOSPEC LTD
Process for converting diesel thermal vehicles to a dual-fuel gas version with a restricted mode
PendingFR3160208A1Electrical controlInternal combustion piston enginesEngine powerMechanical engineering
Method for converting diesel thermal vehicles to a dual-fuel gas version with a restricted mode. The invention relates to the field of converting thermal vehicles to a dual-fuel gas version in the case of diesel engine vehicles. It comprises the addition in the passenger compartment of a fuel selection switch either in 100% diesel mode or in mode with a proportion of gaseous fuel in indirect injection into the intake and a proportion of diesel fuel in proportions depending on the operating conditions, and in 100% diesel mode the engine power is restricted by at least 20% so as to reduce emissions regardless of the choice made by the user of the vehicle. Figure to be published with the abstract: Fig. 1.
Owner:HERBAULT PATRICK
Drive systems for a motor vehicle, methods for operating
The invention relates to a drive unit (1) for a motor vehicle, comprising a hydrogen combustion engine (2), in particular a reciprocating piston engine or rotary piston engine, which has at least one combustion chamber (10) to which a first injection valve (12) for the direct or indirect injection of hydrogen and a first ignition device (11) are assigned, a supply system (13) with a high-pressure line (17) for supplying the hydrogen, wherein the first injection valve (12) is connected to the high-pressure line (17), and an exhaust aftertreatment system (21) which is connected downstream of the combustion chamber (10) and comprises at least one exhaust aftertreatment device (22-24), in particular a catalyst or filter. It is provided that the exhaust aftertreatment system (21) comprises an exhaust gas burner (30) which is controlled depending on partial load operation of the hydrogen combustion engine.
Owner:ROBERT BOSCH GMBH