55 results about "Glowplug" patented technology

A pressure glow plug for a diesel engine has a glow plug body 2 for being inserted into a cylinder of the diesel engine, a heating rod 1 that is arranged in the glow plug body 2 and a pressure sensor 9 that is arranged between the heating rod 1 and the glow plug body 2 in such a way that the pressure in the combustion chamber of the cylinder that is transmitted by the heating rod 1 influences the pressure sensor 9. The heating rod 1 is arranged in the glow plug body 2 such that it can be displaced in an axially sliding fashion, namely by a corresponding sliding element, for example, a membrane 7 or seals 3.

A sheathed element glow plug includes an integrated combustion chamber pressure sensor for a self-igniting internal combustion engine for measuring combustion chamber pressures, in particular for combustion chamber signal-based engine control. The sheathed element glow plug has a heating element and a glow plug housing, as well as a glow plug axis. The glow plug housing has a receptacle area for receiving the heating element, a housing body, and at least one flexibility area situated between the housing body and the receptacle area. At least one force measuring element is installed in the glow plug housing.

An embodiment of this invention discloses a cold-booting auxiliary device for a diesel engine and a control method; because the cold-booting auxiliary method disclosed by this invention adjusts a heating time of a preheating plug according to an actual water temperature, the method disclosed by this invention realizes to adjust the heating time of the preheating plug according to change of an environment temperature and develops heating action at a stating stage and an idling warming-up stage, the temperature of a combustion chamber of an engine is increased, and combustion and tail gas emission of the engine can be improved obviously; simultaneously, an actual temperature and a position of a booting switch are detected so as to control a booting time and a diesel injection quantity of a diesel injection pump advancer, thus, a diesel supply advancing angle of the diesel engine is changed; when a water temperature is low, diesel injection of the diesel engine can be assisted so as to further improve cold-booting performance of the diesel engine; based on an above-mentioned method, the cold-booting auxiliary device disclosed by this invention improves the cold-booting performance of the diesel engine.

The invention discloses a control method of a non-road diesel particulate filter (DPF) system, which comprises the following steps: a DPF forced regeneration request; a DPF forced stop regeneration completion request; a DPF combustor warmup request; determination of the regeneration working time based on a pressure difference/flow resistance model; heater plug ignition and heating initialization;flame propagation and diffusion of a mixed gas; successful combustion of the mixed gas; DPF regeneration temperature closed-loop control; fuel injection quantity open-loop calculation; fuel injectionquantity closed-loop calculation; determination of the exhaust over-temperature of the DPF; and finishing of the DPF regeneration and purging by an air pump. The DPF combustor has a high regenerationspeed, does not need to perform bus signal transmission with a diesel engine, has a small influence on the running of a vehicle, is easy to operate, has no negative effect, and cannot influence the performance of the diesel engine.

A glow plug control method of a diesel hybrid vehicle includes: determining an operation time of a glow plug based on a coolant temperature while the vehicle runs in an electric vehicle mode with an electric motor; determining whether the inside of an engine cylinder needs to be preheated based on the coolant temperature; comparing a driver-required power with a standard start power for determining whether to start a diesel engine; determining a glow plug operation time and a standard glow operation power, when the driver-required power is under the standard start power; operating the glow plug in advance, when the standard glow operation power is less than the driver-required power; and starting the diesel engine, when the driver-required power is higher than the standard start power.

The invention provides a diesel engine plateau cold-start preheating method. The diesel engine plateau cold-start preheating method comprises the following steps that after a diesel engine electroniccontrol system is powered on, whether the smaller one of the coolant temperature and the inlet air temperature is lower than -5 DEG C or not is judged, and if yes, inlet air preheating needs to be conducted; a preheating plug is controlled to conduct inlet air heating according to the preheating duration inquired by an MAP picture in the premier preheating process; after premier preheating is completed, a prompt is given, starting is waited, time is recorded for a certain period of time to wait for starting, when the rotation speed meets the starting requirement, waiting is stopped, and the later preheating process starts to be performed. According to the diesel engine plateau cold-start preheating method, an inlet air preheating strategy under the cold-start working condition is built byutilizing a few of environment variables, the preheating process is divided into the singular inlet air hating stage before starting and the inlet air heating stage cooperating with fuel oil injectionafter starting according to the engine state, and the whole preheating process is optimized and accelerated; and through the strategy, under the condition of the limited computing resources distributed by a single chip microcomputer, the preheating process under the plateau extreme environment of which the lowest temperature is -30 DEG C is quickly and effectively controlled in real time.

A method for controlling power supply of a pre-heat plug in an internal combustion engine to reach an ignition temperature for restarting the engine after the engine has stopped. The temperature of the pre-heat plug is determined using a first mathematical model and according to an elapsed engine-stop time, and additional energy to be supplied to the pre-heat plug for reaching the ignition temperature is determined using a second mathematical model and according to the temperature of the pre-heat plug.

The invention discloses an explosion-proof preheating plug. A heat insulation shell is fixed on the side wall of a combustion chamber of an engine, and a fixed shell extending out of the combustion chamber and a heat conduction shell extending into the combustion chamber are fixedly arranged on the heat insulation shell; an electric heating wire is arranged in the heat conduction shell, the electric heating wire provides power by two preheating cables to form a loop, the power supply loop is composed of two independent wires, there is no need to form the loop with the help of a shell, and electric leakage is avoided; and at least one preheating cable is provided with a fuse capable of breaking at high temperature, and the fixed shell and the heat insulation shell are filled with insulationpouring sealant. When a system is overloaded, the fuse is disconnected, the circuit is disconnected, the preheating work is stopped, the temperature is prevented from exceeding the safety value, andthe system safety is guaranteed. The invention further provides an explosion-proof preheating control system, wherein the electric heating wire and the fuse are arranged in series on the preheating cables, the plurality of preheating cables are connected in parallel to a total circuit, and when the circuit is overloaded, the fuse is broken, so that the above technical effect can be realized.

The invention discloses a diesel engine automatic preheating device. The structure of the diesel engine automatic preheating device is as follows: a glow plug and a jacket heater are respectively arranged on the left lower end and the left side wall of a cylinder cover jacket, and a water temperature sensor is assembled in a small circulating water path of a thermostat; a controller is connected respectively to power supply interfaces of the glow plug, the jacket heater and the temperature sensor through circuit wiring harnesses; the glow plug and the jacket heater jointly heat air entering a combustion chamber, the controller automatically judges the connection/disconnection and the heating time of the glow plug and the jacket heater according to a temperature signal output by the water temperature sensor, and the controller can automatically regulate the preheating time according to the temperature of an engine jacket, thereby automatically controlling the work states of the glow plug and the jacket heater. When a diesel engine is started at a low temperature, the work is stable and soft, the wear of engine components can be effectively reduced, and the service life of the engine is prolonged while fuel is saved. The device also has the advantages of being simple and convenient to mount, being safe and reliable, being convenient to maintain and being energy-saving.

The present invention relates to an engine using glow plug resistance for estimating combustion temperature. More specifically, the invention discloses an internal combustion engine that includes an engine block defining at least one cylinder therein. A cylinder head is attached to the engine block and defines a combustion chamber with the at least one cylinder in the engine block. A piston is disposed within the at least one cylinder. A glow plug is disposed within the combustion chamber. A resistance of the glow plug is detected and an estimated combustion temperature is determined based upon the detected resistance of the glow plug. The engine is then controlled based upon the estimated combustion temperature established from the glow plug resistance.

Disclosed is a glow plug comprising a sheathed element (14) which is accommodated in a metallic housing. The sheathed element comprises a glow tube (16) and a coiled element (18) arranged in the glow tube (16), wherein one end of the coiled element is in electrical contact with the glow tube and the other end is in electrical contact with a connecting pin (17). The connecting pin protrudes into an axial opening (22) of the glow tube where the connecting pin is connected in a sealing section (23) to the glow tube in an electrically insulating manner by means of a heating body seal. An electric insulating layer (33) is formed at least in the sealing section on the glow tube and/or the connecting pin. In order to provide a heating body seal, the glow tube is pressed in the region of the electric insulating layer onto the connecting pin.

The invention discloses an aerial piston engine preheating system. The aerial piston engine preheating system comprises a heater plug, a heater plug controller, an engine temperature sensor, an airplane wheel load sensor and an engine power supply detection module; the engine temperature sensor, the airplane wheel load sensor and the engine power supply detection module are correspondingly connected with an input end of the heater plug controller; an output end of the heater plug controller is connected with the heater plug; and the heater plug controller is used for controlling the work of the heater plug according to the received temperature, load and power supply state. The aerial piston engine preheating system disclosed by the invention has the advantages of realizing effective preheating, reducing influences caused by over-low temperature on start, increasing input conditions for starting the work of the system and the decision conditions for ending the work, realizing more rigorous and comprehensive logic of the system, also effectively reducing the mis-operation property and improving the safety and reliability of the system.

A method for determining the temperature of a sheathed-element glow plug during operation in an internal combustion engine is described, in which a temperature-resistance reference correlation is determined. In order to reduce the tolerance range of a sheathed-element glow plug, after the sheathed-element glow plug has been installed in the internal combustion engine, a calibration step is carried out in which, with the aid of the temperature-resistance reference correlation determined prior to the installation of the sheathed-element glow plug in the internal combustion engine, a temperature-resistance correlation specific to the sheathed-element glow plug is ascertained, from which the temperature of the sheathed-element glow plug during operation of the sheathed-element glow plug in the internal combustion engine is determined.

A ceramic glow plug equipped with a pressure sensor including a ceramic heater, a holding device, a housing sleeve, a housing, a movable member and a pressure sensor. A heat-generating main portion P whose resistance is 75% of the total resistance of the ceramic heater is located forward of the forward end of the holding sleeve.

The invention discloses an inlet air heating device of a diesel engine. The inlet air heating device of the diesel engine comprises an oil inlet pipe, a pipe type electromagnetic valve, hinge tee joints, an oil outlet pipe, a filter connector, an electricity connection contact, a through hole, a threaded structure, a threaded-connection electricity connection device, a connector, a flange, an electric heating wire and a flame pre-heating plug, and is characterized in that the hinge tee joints are arranged on the left and right sides of the pipe type electromagnetic valve respectively; the hinge tee joint on the left side of the pipe type electromagnetic valve is connected with the oil inlet pipe; the hinge tee joint on the right side of the pipe type electromagnetic valve is connected with the oil outlet pipe; the other end of the oil outlet pipe is connected with the flame pre-heating plug; the connector is arranged on the left side of the flame pre-heating plug; the threaded-connection electricity connection device is arranged at the top of the flame pre-heating plug; the flange is arranged in the middle of the flame pre-heating plug; the electric heating wire is arranged at the bottom of the flame pre-heating plug. The inlet air heating device of the diesel engine is reasonable in structure, convenient to install, low in cost and capable of heating the air entering the diesel engine at the moment of ignition of the diesel engine, thereby improving the starting performance of the diesel engine and meanwhile reducing the serious vibration and white smoke rising phenomena of the diesel engine.

The invention relates to the technical field of power devices, and provides a homogeneous premixed combustion engine and a control method thereof. The homogeneous premixed combustion engine comprisesa cylinder body, a piston, an adjusting top cover, a cylinder pressure sensor, a preheating plug, an intake valve, an exhaust valve and a control device. The adjusting top cover is used for adjustingthe size of a combustion chamber in a sliding manner. The cylinder pressure sensor is used for collecting pressure information in the combustion chamber. The preheating plug is used for heating the combustion chamber. The intake valve is used for controlling opening and closing of an intake passage and a combustion chamber passage. The exhaust valve is used for controlling opening and closing of an exhaust passage and the combustion chamber passage. The control device is used for controlling the preheating time of the preheating plug, the injection time of a fuel nozzle and operation of the intake valve and the exhaust valve, and controlling the position of the adjusting top cover according to the pressure information and the crank angle of the piston. According to the homogeneous premixedcombustion engine, the compression ratio of the engine can be adjusted in real time according to the heat release rule during fuel homogeneous premixed compression ignition.

The invention discloses a compression ignition engine system using single methanol fuel, comprising: a compression ignition engine (1) comprising a cylinder assembly comprising a cylinder (2), a glowplug (6), an intake passage (7), an exhaust passage (19) and a fuel nozzle (3); a gas supply system that comprises a supercharger (14) and a gas inlet pipe (9) which are sequentially connected in series, wherein a heating mixing section (10) is arranged in the middle of the gas inlet pipe (9), and the heating mixing section (10) is connected with an ignition agent nozzle (11); and an exhaust system that comprises an exhaust pipe (5), wherein an inlet of the exhaust pipe (5) is connected to the exhaust passage (19), and an outlet of the exhaust pipe (5) is connected to the supercharger (14). The mixed gas of methanol and air is used as the ignition agent, methanol is used as fuel, normal operation of the compression ignition type engine system is achieved, the whole combustion process is controllable and efficient, and application of single methanol fuel to a diesel engine is achieved.

The invention provides a dual-glowplug based engine preheating method, system and vehicle; the method comprises the following steps: determining an engine present work mode; controlling the dual-glowplug to simultaneously preheat the engine at a first preheating temperature if the engine is in a start mode; controlling at least one glowplug to preheat the engine at a second preheating temperature if the engine is in an idle and warm up mode, wherein the second preheating temperature is lower than the first preheating temperature; controlling the dual-glowplug to alternatively preheat the engine at a third preheating temperature if the engine is in a low temperature load running mode, wherein the third preheating temperature is lower than the second preheating temperature; controlling the dual-glowplug to simultaneously preheat the engine at a fourth preheating temperature if the engine is in a limited condition mode, wherein the fourth preheating temperature is between the first and second preheating temperatures. The novel method can preheat the engine when the vehicle is under various running conditions, and is high in preheating efficiency.

The invention relates to the field of engines, in particular to a direct injection compression ignition engine and a cold start method thereof. The engine comprises an oil spraying nozzle and a combustion chamber, wherein the oil spraying nozzle is formed in the upper part of the combustion chamber; and multiple oil spraying holes are formed in the peripheral direction of the oil spraying nozzle. The engine further comprises a glow plug; and the glow plug is arranged at the upper part of the combustion chamber, and is positioned between the spraying directions of the two oil spraying holes. When the spraying of the oil spraying nozzle is finished, the concentration of mixed gas is close to a theoretical air-fuel ratio; along with the spraying motion and the flowing of gas in a cylinder, an area of the mixed gas with equivalence ratio concentration appears around the top end of the glow plug; in the first circulation of cold start of the engine, the glow plug heats the surrounding mixed gas to rise up the gas temperature to realize the ignition; and meanwhile, as an oil spraying pocket is not contacted with the glow plug, the carbon smoke discharge caused by oil film combustion due to wall collision in high load is prevented.