48results about "Non-electrical control" patented technology

Dual fuel compression ignition engines and methods that allow compression ignition on gaseous fuels like compressed natural gas, hydrogen and ammonia, yet will run on liquid fuels, including diesel fuels for such purposes as starting or when the gaseous fuel is not available or has been consumed and greater range or operating time is needed. Ignition of fuels having a high self ignition temperature is assured by recirculating high temperature exhaust gas back into the intake charge before compression. Existing engines may be converted to run as a dual fuel engine by replacement of the engine head or heads. Various embodiments are disclosed.

In an engine starting control system of an internal combustion engine in which an eco-run control is performed, a combustion stroke that each cylinder reaches when the internal combustion engine comes to an engine stopped state by the eco-run control is predicted, and in an expansion stroke cylinder that the predicted combustion stroke is an expansion stroke, fuel of a predetermined amount is injected from an intake passage injection valve into an intake passage just before the internal combustion engine comes to an engine stopped state, and in the expansion stroke cylinder, an engine start of the internal combustion engine in an engine stopped state is performed by injecting fuel from the cylinder injection valve into the cylinder and igniting the air-fuel mixture in the cylinder by an ignition plug.

In an engine starting control system of an internal combustion engine in which an eco-run control is performed, a combustion stroke that each cylinder reaches when the internal combustion engine comes to an engine stopped state by the eco-run control is predicted, and in an expansion stroke cylinder that the predicted combustion stroke is an expansion stroke, fuel of a predetermined amount is injected from an intake passage injection valve into an intake passage just before the internal combustion engine comes to an engine stopped state, and in the expansion stroke cylinder, an engine start of the internal combustion engine in an engine stopped state is performed by injecting fuel from the cylinder injection valve into the cylinder and igniting the air-fuel mixture in the cylinder by an ignition plug.

Dual fuel compression ignition engines and methods that allow compression ignition on gaseous fuels like compressed natural gas, hydrogen and ammonia, yet will run on liquid fuels, including diesel fuels for such purposes as starting or when the gaseous fuel is not available or has been consumed and greater range or operating time is needed. Ignition of fuels having a high self ignition temperature is assured by recirculating high temperature exhaust gas back into the intake charge before compression. Existing engines may be converted to run as a dual fuel engine by replacement of the engine head or heads. Various embodiments are disclosed.

A heat supply system is provided which enables use of small pipes with the same diameter for both feed branch pipes and return branch pipes, thus reducing the initial cost and also suppressing heat emission loss. The heat supply system comprises a heat exchanger 1, a feed main pipe 2, a return main pipe 3, a feed branch pipe 4 connected to the feed main pipe 2, a first return branch pipe 5 for directing the flow of a heat medium to an edge section in the downstream side of the feed branch pipe 4, a plurality of load pipes connected in parallel to a section between the feed branch pipe 4 and the first return branch pipe 5 each having a load member 7 provided thereon, and a second return branch pipe 6 connected to a section between an edge section in the downstream side of the first return branch pipe 5 and the return main pipe 3, said heat supply system having a plurality of branch pipe paths 11 including therein the feed branch pipe 4, first return branch pipe 5, load pipe 8, and second branch pipe 6.

A method is for starting a combustion engine having a pull-rope starter. A fuel / air mixture is fed to the engine via an intake channel. The mixture is ignited by a spark plug. The combustion drives the piston downward and drives a crankshaft rotationally. The fuel system has a fuel channel opening into the intake channel. An electric fuel valve is open in its currentless state and closes a fuel channel only when an operating voltage is applied. An electronic control unit actuates the fuel valve and triggers an ignition spark and is utilized by a generator to supply energy to the control unit, the fuel valve and the ignition device. To prevent excessive enriching of the fuel / air mixture during starting, the energy, which is generated at the beginning of the rotation of the crankshaft, is used to first close the fuel valve before the control unit triggers an ignition spark.

The invention discloses a control method for piston motion track of a free piston engine, and belongs to the technical field of control. The invention aims to provide the control method for the piston motion track of the free piston engine, and the control method establishes a free piston internal combustion engine generator mechanism model system under an MATLAB environment according to the working mechanism of the free piston internal combustion engine generator, can effectively compensate interferences and keeps stable operation of the free piston internal combustion engine generator. The control method comprises the following steps of: establishing a free piston electric generator simulation model; controlling piston track of the free piston electric generator; enabling track of the piston to trace reference track, wherein the reference track is that a FPEG works under load needed for a driver; establishing a control-oriented model; designing a quadric-form secondary optimal controller; expanding design of a state observer; and performing uncertainty compensation. According to the control method disclosed by the invention, a control-oriented simplified model of the system is established, a piston motion control method based on linear quadratic type (LRQ) and extended state observer (ESO) is disclosed, and piston motion track of EPEG is controlled by regulating circulating oil spray amount.

The invention relates to a secondary combustion working method of a six-stroke internal-combustion engine. In the method, one working cycle of the internal-combustion engine can be divided into an air intake stroke, a primary compression stroke, a primary combustion stroke, a secondary compression stroke, a secondary combustion stroke and an exhaust stroke in sequence by the movement of a piston of the internal-combustion engine, wherein in the primary combustion stroke, primary fuel is used for combustion, and in the secondary combustion stroke, secondary fuel is used for combustion; the primary fuel is sprayed in a cylinder body of the internal-combustion engine in the primary compression stroke, the secondary fuel is sprayed in the cylinder body of the internal-combustion engine at the moment that the piston of the internal-combustion engine gets away a top dead center of the secondary combustion stroke or in the secondary combustion stroke. In the method, the fuel air ratio of the sum of the primary fuel and the secondary fuel, and the intake air of the air intake stroke is not more than the fuel air ratio in theory of the fuel mixed by the primary fuel and the secondary fuel. In the secondary combustion working method of the six-stroke internal-combustion engine, the problem that the internal-combustion engine has poor consumption performance under high-load working condition is solved, and simultaneously the discharge of harmful tail gas of the internal-combustion engine is greatly reduced.

The invention relates to the technical field of automobiles, in particular to a method for preventing engine cylinder scoring. According to the method for preventing engine cylinder scoring, whether an engine fails or not is judged by measuring performance parameters of the engine; when it is judged that the engine fails according to the performance parameters of the engine, the output torque of the engine is limited first; and after the output torque of the engine is reduced, when the abnormal situation of the engine is still not improved or eliminated, the engine is directly turned off. According to the method, the situation that the gas inlet temperature, water temperature and lubrication situations of the engine become abnormal within a short period of time due to burst problems such as intercooler and throttle valve blockage, fan faults and engine oil leakage is considered, and it is effectively avoided that cylinder scoring happens when this type of situations happen to the engine.

A continuous steam generator including a combustion chamber with a plurality of burners for fossil fuel is provided. A vertical gas duct is connected downstream of the combustion chamber on the hot gas side, in an upper region via a horizontal gas duct. The outside wall of the combustion chamber is formed from evaporation pipes which are welded together in a gas-tight manner and mounted upstream of a water separator system on the flow medium side and from superheater pipes which are welded together in a gas-tight manner and mounted downstream of the water separator system. The water separator system includes a plurality of water separation elements, each element includes an inlet tube which is connected to the respective upstream evaporation for tubes, which extend into a water evacuation tube. A distributer element is arranged on the evaporator side between the respective water separator element and the inlet collector.

The disclosure relates to an engine assembly, and an internal combustion engine assembly for a motor vehicle is provided. The engine assembly comprising: an engine; an electric motor; and a balance shaft comprising an eccentric mass, wherein the electric motor is configured to selectively rotate the balance shaft in order to balance a vibration characteristic of the engine. A method of operating the engine assembly is also provided.

The invention relates to a control device applied to a cylinder injection type of an internal combustion engine (10). The control device control a disperse parameter for changing a degree of a spread of the fuel spray injected from the injector (20) such that the maximum degree of the spread of the fuel spray under a state where an amount of the fuel adhering to the spark generation part (31a) of the spark plug (30) at the ignition timing corresponds to a first amount, is smaller than the maximum degree of the spread of the fuel spray under a state where the amount of the fuel adhering to the spark generation part at the ignition timing corresponds to a second amount smaller than said first amount.

The invention relates to an internal combustion engine, a method for operating the internal combustion engine, and a cylinder, a cylinder liner and a closing plate for the internal combustion engine. The internal combustion engine (1) is particularly a two-stroke engine, preferably a diesel two stroke engine, and comprises at least one piston (10) arranged in a cylinder (11). The piston (10) and the cylinder (11) define a variable combustion chamber (101) and a variable second chamber (102). The variable combustion chamber (101) is fluidly connectable to the compressor side of a turbocharger (2, 2') via at least one inlet opening (111) and to the turbine side of the turbo charger (2, 2') via an exhaust opening (112). The second chamber (102) is fluidly connectable to the compressor side of the turbocharger (2, 2') to introduce a compressed air flow into the second chamber (102).

The invention provides an engine limit load control method and device. The engine limit load control method includes the steps of obtaining the current rotating speed of an engine, obtaining a rotating speed / torque relation graph of the engine, dividing the rotating speed / torque relation graph into multiple areas according to the rotating speeds, using a straight line section to connect a start point of each area with the end point of the area to obtain a rotating speed / torque relation curve of the engine, obtaining the largest output torque corresponding to the current rotating speed according to the rotating speed / torque relation curve, and controlling the torque consumed by a hydraulic system driven by the engine to be always smaller than the largest output torque. The largest output torque which can be supplied by the engine at some moment can be obtained in real time, meanwhile, the size of the torque consumed by the hydraulic system is controlled, and therefore the torque can be always smaller than the largest output torque which can be outputted by the engine, so that the engine can supply enough power for the hydraulic system, and the hydraulic system can not be shut down under various working conditions.

The invention provides a control method and system for a multi-stroke circulation gasoline engine and a vehicle. The control method comprises the steps that if the engine is a multi-stroke circulation direct-injection gasoline engine, gasoline fuel is provided for a combustion chamber from the end section of an induction stroke and / or a compression stroke to the front section of an expansion stroke in a current multi-stroke circulation mode; ignition time is determined according to finishing temperature, a mixed gas average air-fuel ratio, a gasoline fuel injection amount around a compression upper dead center and injection timing, and ignition is performed at the ignition time; if the engine is a multi-stroke circulation port injection gasoline engine, the gasoline fuel is provided for a port at the induction stroke and / or an exhaust stroke in the current multi-stroke circulation mode; and ignition timing is determined during a period from the end section of the compression stroke to the front section the expansion stroke, and ignition is performed at the ignition timing. By adopting the method, fuel economy of the engine in multiple operation conditions can be effectively improved; and emission of tail gas pollutants is lowered.

A six-stroke engine includes a cylinder, a piston, a cylinder head, a combustion chamber, cylinder injector, a spark plug, an intake port, an exhaust port, an intake valve, an exhaust valve, a valve gear, and a control device. The valve gear operates the intake valve and the exhaust valve to execute six strokes including an intake stroke, a compression stroke without ignition, an expansion stroke without combustion, a compression stroke with ignition, an expansion stroke with combustion, and an exhaust stroke in this order. The control device is programmed to cause the cylinder injector to inject fuel and to energize the spark plug in the compression stroke with ignition.

The invention discloses a control method of a fluid control device 10 such as a turbocharger, particularly for an internal combustion engine equipped with a position sensor 12 for measuring the position of the variable geometry turbocharger blades. The position sensor has a nominal characteristic curve (A) representative of a predetermined relationship between an admissible range of position values and a corresponding range of return electric signal values. The method comprises the steps of: determining an offset between a returned signal related to at least one defined position of the device 10 and an expected signal related to said defined position of the device according to the nominal characteristic curve (A); estimating an updated characteristic curve (B) of the sensor by applying said offset to the nominal characteristic curve (A); and applying a predetermined control strategy of the fluid control device 10 according to the updated characteristic curve (B).

An implement comprises an internal combustion engine having a throttle valve. At least one handle, the inside of which is provided with a gas lever likewise in a pivotal manner, is attached to a housing surrounding the internal combustion engine. The minimum distance between the gas lever and the handle is defined by a stop. When the operator lifts the implement by the handle, the position of the gas lever also changes. Even when the gas lever is fully depressed, only a part-load position is achieved at the throttle valve. In this way, effective rotational speed limitation is achieved.

ethods and systems are provided for adjusting engine operation of a hybrid vehicle to increase power output, and fuel efficiency. In one example, a method may include operating the engine using an Atkinson cycle during a lower than threshold engine torque demand, and a lower than threshold battery state of charge, and operating the engine using an Otto cycle during a higher than threshold torque demand. During operating in the Otto cycle, an octane booster may be injected to the fuel line to increase the octane level in the fuel.

An internal combustion engine assembly for a motor vehicle is provided. The engine assembly comprising: an engine; an electric motor; and a balance shaft comprising an eccentric mass, wherein the electric motor is configured to selectively rotate the balance shaft in order to balance a vibration characteristic of the engine. A method of operating the engine assembly is also provided.

To provide the suitable control of a piston trajectory in a free piston combustion engine.SOLUTION: In a variety of embodiments in this disclosure, a free piston combustion engine is set as an object. As explained in this specification, a free piston assembly is displaced by a method and a system, a position / force trajectory is repeatedly determined over a propagation path, and desired engine performance can be achieved by displacing the free piston assembly on the basis of the position / force trajectory at least partially. In the double-piston assembly free piston engine, two piston assemblies are synchronized with each other.SELECTED DRAWING: Figure 8

In an exemplary embodiment, an internal combustion engine, in which a valve is opened and closed when a piston reciprocates in a cylinder, has a configuration to perform repeatedly the following combined strokes: an intake stroke→a compression stroke→a combustion stroke→an exhaust stroke in a four-cycle internal combustion engine are combined with an intake and compression stroke→a combustion and exhaust stroke in a two-cycle internal combustion engine. The internal combustion engine can reduce pumping loss in a six-cycle internal combustion engine and increase the output.

Methods and systems are provided for operating an engine having a plurality of cylinders that utilize oil for lubrication purposes. In one embodiment, a method for the engine may include determining if one or more conditions have been met for port heating based on one or more operating conditions of the engine, continuing current operation if the one or more conditions for port heating have not been met, and determining a souping level of the engine if the one or more conditions for port heating have been met and subsequently running port heating on a set of cylinders of the engine based on the souping level of the engine and / or the one or more conditions for port heating. The engine may be a non-EGR engine and / or a high speed diesel engine. Each cylinder of the set of cylinders may have at least one port.

The invention discloses a control method for piston motion track of a free piston engine, and belongs to the technical field of control. The invention aims to provide the control method for the piston motion track of the free piston engine, and the control method establishes a free piston internal combustion engine generator mechanism model system under an MATLAB environment according to the working mechanism of the free piston internal combustion engine generator, can effectively compensate interferences and keeps stable operation of the free piston internal combustion engine generator. The control method comprises the following steps of: establishing a free piston electric generator simulation model; controlling piston track of the free piston electric generator; enabling track of the piston to trace reference track, wherein the reference track is that a FPEG works under load needed for a driver; establishing a control-oriented model; designing a quadric-form secondary optimal controller; expanding design of a state observer; and performing uncertainty compensation. According to the control method disclosed by the invention, a control-oriented simplified model of the system is established, a piston motion control method based on linear quadratic type (LRQ) and extended state observer (ESO) is disclosed, and piston motion track of EPEG is controlled by regulating circulating oil spray amount.

The present invention relates to a camshaft that opens and closes an exhaust valve in an exhaust port and an intake valve in an intake port of an internal combustion engine, in which the intake valve alternately opens and closes the intake port, and the exhaust valve alternately opens and closes the exhaust port, when a piston reciprocates in a cylinder. The camshaft comprises, as a cam that opens and closes the exhaust valve and the intake valve, a ball cam whose protrusion amount changes according to rotation of the camshaft, wherein the camshaft has a double structure consisting of an inner shaft and an outer shaft provided in a manner that the inner shaft is helically displaced with respect to the outer shaft around an axis of the camshaft according to a rotation speed of the camshaft, and the ball cam is accommodated movably in a guide groove provided in the inner shaft and protrudes from the outer shaft, and a protrusion amount of the ball cam from the outer shaft changes when the ball cam moves in the guide groove due to the helical displacement of the inner shaft with respect to the outer shaft, wherein, on a contact surface between the outer shaft and the inner shaft, a helical screw is provided, and at a bottom of the outer shaft and the inner shaft, a pressing spring is provided.

The invention provides a control method and system for a multi-stroke circulation gasoline engine and a vehicle. The control method comprises the steps that if the engine is a multi-stroke circulation direct-injection gasoline engine, gasoline fuel is provided for a combustion chamber from the end section of an induction stroke and / or a compression stroke to the front section of an expansion stroke in a current multi-stroke circulation mode; ignition time is determined according to finishing temperature, a mixed gas average air-fuel ratio, a gasoline fuel injection amount around a compression upper dead center and injection timing, and ignition is performed at the ignition time; if the engine is a multi-stroke circulation port injection gasoline engine, the gasoline fuel is provided for a port at the induction stroke and / or an exhaust stroke in the current multi-stroke circulation mode; and ignition timing is determined during a period from the end section of the compression stroke to the front section the expansion stroke, and ignition is performed at the ignition timing. By adopting the method, fuel economy of the engine in multiple operation conditions can be effectively improved; and emission of tail gas pollutants is lowered.

An internal combustion engine (1) and corresponding method, cylinder, closing plate, cylinder and kit of parts, in particular a two-stroke engine, preferably a diesel two stroke engine, which comprises at least one piston (10) arranged in a cylinder (11). Said piston (10) and said cylinder (11) define a variable combustion chamber (101) and a variable second chamber (102). The variable combustion chamber (101) is fluidly connectable to the compressor side of a turbocharger (2,2') via at least one inlet opening (111) and to the turbine side of the turbo charger (2,2') via an exhaust opening (112). The second chamber (102) is fluidly connectable to the compressor side of the turbocharger (2,2') to introduce a compressed air flow into the second chamber (102). The compressed air flow is interruptible such that the second chamber (102) is disconnected from the turbocharger (2, 2') and the second chamber (102) comprises an outlet opening (113) for reducing a pressure of the second chamber (102). The outlet opening (113) preferably comprises a controllable chamber valve.

To provide optimal control of the piston trajectory in a free-piston combustion engine. [Solution] Various embodiments of this disclosure relate to free-piston combustion engines. As described herein, methods and systems are provided to achieve desired engine performance by displacing a free-piston assembly, repeatedly determining the position-force trajectory over the propagation path, and causing the displacement of the free-piston assembly based at least partially on the position-force trajectory. In a dual-piston assembly free-piston engine, synchronization of two piston assemblies is provided.