24 results about "Glowplug" patented technology

The invention relates to a control method based on low-temperature cold start of a heuristic integrated heavy oil engine, and relates to the field of heuristic integrated heavy oil engines. According to the technical scheme, the preheating plug in the cylinder is combined with the air inlet heating grid, synchronous control is achieved through the same relay, the electric energy requirements of synchronous work and dragging and preheating are met by means of sufficient battery capacity, and the device can be adapted to the ultra-low temperature of-40 DEG C or below and the plateau environment of 4700 m or above; three starting attempts are supported by single-time power-on through intelligent preheating control logic, the pre-preheating and heating-while-dragging processes are executed each time, fault information is automatically uploaded after starting fails, frequent power-off is not needed, and the starting efficiency is improved. And moreover, through an intermittent post-preheating and intake synchronous heating strategy, the combustion stability in the cylinder is effectively improved, the rotating speed fluctuation time is shortened, and mechanical damage caused by flameout and unstable idling after starting is avoided. In addition, the dragging rotating speed control based on the torque can prevent the problem of engine damage caused by accidental detonation after multiple starting failures.

The invention discloses a fuel injection method and device of an engine, a vehicle and a storage medium, a cylinder cover of the engine is provided with a fuel injector, a glow plug is arranged below an air inlet channel, the fuel injector is configured to inject fuel into a combustion chamber of the engine, and the glow plug is configured to heat the combustion chamber of the engine. The method comprises the steps that under the condition that an engine starting instruction is received, the cooling water temperature of an engine is obtained; under the condition that the temperature of the cooling water is smaller than or equal to a first preset temperature threshold value, the glow plug is controlled for heating; and under the condition that the temperature of the glow plug reaches the second preset temperature threshold value, the motor of the vehicle is controlled to drag the engine to rotate at the preset rotating speed, and the fuel injector is controlled to conduct single-time injection into the combustion chamber in the later period of the compression stroke. According to the fuel injection method, the problem that single-fuel cold start of the methanol engine is difficult in cold weather can be solved, the success rate of cold start of the engine is increased, and the cost can be reduced.

A system for reducing internal combustion engine emissions includes an engine, a catalytic converter fluidly connected to a combustion chamber via an exhaust line, a glow plug positioned along the exhaust line between the catalytic converter and the combustion chamber, and a flame accelerator, without a fluid connection to a separate fuel supply. Methods of using the system include igniting a mixture of air and fuel in the exhaust line using the glow plug, producing an amount of heated combustion gas.

The invention discloses an ultrasonic air atomization diesel oil preheating plug, and relates to the technical field of diesel oil preheating plugs. The oil supply heating unit is arranged in the shell and comprises an L-shaped oil supply capillary tube penetrating through the shell and a PTC (Positive Temperature Coefficient) heater fixed on the oil supply capillary tube; the atomizing unit is arranged at the bottom of the shell and comprises a trumpet-shaped atomizing surface microwell plate and an annular piezoelectric ceramic piece which is fixed on the bottom surface of the atomizing surface microwell plate and is provided with a central through hole; through mutual cooperation of a shape memory alloy coil spring, a sliding supporting column, a cross-shaped sliding limiting hole, a supporting base, a scraping head, a reset spring and a back face cleaning area of the atomization face microwell plate, mechanical scraping can be conducted on the back face of the atomization face microwell plate, a carbon deposition layer is removed, power is cut off after the action is completed, the coil spring is cooled and contracted, and the atomization face microwell plate is cleaned. And the mechanism is reset under the action of the reset spring, so that the problems that the vibration damping is increased, the atomization efficiency is sharply reduced and even fails due to carbon deposition coverage on the ultrasonic atomization surface are solved.

The invention provides a minimum intake preheating power design method for an on-way heat dissipation flame glow plug diesel engine, which comprises the following steps of: firstly, constructing a diesel engine intake energy conservation equation set considering on-way heat dissipation of an intake pipeline; then, a triple data set composed of the atmospheric environment temperature, the air inlet pressure value and the corresponding minimum air inlet preheating power is obtained according to the diesel engine air inlet energy conservation equation set, and finally, a first Map graph of the minimum air inlet preheating power changing along with the diesel engine rotating speed and the atmospheric environment temperature is obtained according to the triple data set; according to the second Map, the minimum air inlet preheating power changes along with the rotating speed of the diesel engine and the altitude; therefore, the on-way heat dissipation loss of the intake manifold and the intake duct is considered, so that the intake preheating power of the diesel engine can be autonomously regulated and controlled along with the change of the environment temperature, and the cold starting performance of the diesel engine can be improved.

System (100) for heating a catalyst (20) of a vehicle, comprising a chamber (110) that can receive an airflow via a chamber inlet port (112), a glow plug (120) housed in the chamber (110) and configured to heat the airflow received in the chamber (110), and an electric compressor (130) located downstream of the chamber (110) and having a compressor inlet port (132) fluidly coupled to a chamber outlet port (114) for receiving the airflow from the chamber (110). The electric compressor (130) is configured to compress the airflow received from the chamber (110) to increase the temperature of the airflow and to supply a compressed airflow to the catalyst (20) via an outlet port (134) of the compressor in order to achieve a cut-off temperature of the catalyst (20).The preheating of the catalyst (20) takes place before the engine (10) is started, thereby reducing emissions under cold conditions.

The application discloses a design method and system of a diesel engine quick cold start electric preheating plug, and comprises the following steps: selecting electric preheating plug design parameters; obtaining electric preheating plug performance parameters according to the electric preheating plug design parameters; performing multi-objective optimization on the electric preheating plug performance parameters by using a non-dominated sorting genetic algorithm to obtain a design scheme that meets constraint conditions and is optimal in terms of total heating time of the electric preheating plug when the cylinder reaches an ignition point and a space volume occupied by the electric preheating plug. By using the technical scheme, optimization of the diesel engine quick cold start electric preheating plug is realized, the number of tests is greatly reduced, and the design efficiency and benefits of the electric preheating plug are improved.

This control device comprises: an acquisition unit that acquires information indicating the terminal voltage of a battery for starting an engine; a pre-glow period calculation unit that calculates, on the basis of the terminal voltage, a pre-glow period which is the period from when the operation of a glow plug for heating a combustion chamber of the engine begins to when the driving of a starter of the engine begins; a glow plug control unit that turns on the glow plug at the beginning of the pre-glow period and turns off the glow plug when the engine is successfully started; and a prohibition period setting unit that sets a prohibition period, during which the glow plug is prohibited from turning on, after the glow plug is turned off. The glow plug control unit does not turn on the glow plug during the prohibition period.

The fuel injection pump comprises a nozzle connecting pipe, a connecting cavity, an electromagnetic valve and a pump seat, the upper portion of the pump seat is connected with the nozzle connecting pipe through the connecting cavity, the electromagnetic valve is arranged on one side of the connecting cavity, a cavity is formed in the center of the pump seat, and a liquid inlet pipeline and a liquid outlet pipeline are further arranged below the cavity. The input end of the cavity is communicated with a liquid inlet channel, the output end of the cavity is communicated with a flow dividing channel, oil flows into the cavity from a liquid inlet pipeline, flows into the flow dividing channel through continuous meshing of a gear and then flows out from the flow dividing channel in two sections, one section is upwards led into an electromagnetic valve, and the other section is downwards led into a second cavity. A preheating device is arranged on one side of the connecting cavity, the bottom of the preheating device is arranged on a base of the connecting cavity, the base of the connecting cavity is connected with the pump base, and a preheating plug is arranged in the preheating device and used for preheating and melting viscous liquid in the cavity and the connecting cavity before the fuel injection pump works, so that the flowability of discharged liquid is good, and starting is easy.

Device for preventing icing of a compressed air preparation system, comprising an electrically operated, self-regulating heating element arranged in the airflow at the inlet of the compressed air preparation system, wherein the heating element automatically adjusts its heating power depending on temperature and airflow, so that the incoming compressed air is heated in such a way as to prevent condensation and icing.

The invention discloses detection equipment and method for an engine glow plug control box. The engine glow plug control box controls a glow plug load loop in an engine to be powered on and work, the detection device is used for simulating the glow plug load loop, and the detection device comprises a shell, a power input interface, a glow plug circuit, a main control switch and a test interface. The power input interface is arranged on the shell. The glow plug circuit is arranged in the shell, and the output end of the glow plug circuit is grounded. The master control switch is arranged on the shell, one end of the master control switch is connected with the power input interface, and the other end is connected with the input end of the glow plug circuit. The test interface is connected with the other end of the main control switch and the input end of the glow plug circuit and is used for being connected with a to-be-tested engine glow plug control box. And the glow plug circuit is electrified to work within continuous preset time under the control of the to-be-detected engine glow plug control box so as to detect the to-be-detected engine glow plug control box. The glow plug load loop is simulated through the detection equipment, and the test process is simplified.

A method of starting a compression ignition engine is provided. The method comprises using a glow plug of the compression ignition engine to perform a warm up routine to preheat the compression ignition engine. During the warm up routine, a fuel rack actuator of the fuel rack is actuated which controls the quantity of fuel to be injected into the compression ignition engine such that the fuel rack is in a start-up fuel injection position by the end of the warm up routine. Following the end of the warm up routine, the compression ignition engine is cranked until the compression ignition engine starts, wherein the fuel rack actuator maintains the start-up fuel injection position of the fuel rack until the compression ignition engine has started.

This invention discloses a low-temperature start-up segmented injection calibration method and ECU system for a methanol compression ignition engine, belonging to the technical field of methanol compression ignition engines. The invention includes using the target engine as the data acquisition target, with the ECU collecting three sets of basic data in real time: the ambient temperature of the engine, the cylinder coolant temperature, and the battery terminal voltage. Based on the basic data, a low-temperature start-up temperature level is determined, and then the in-cylinder preheating plug is controlled in a closed loop based on the determination result to stabilize the in-cylinder temperature within the methanol ignition requirement range. This invention, through closed-loop control of in-cylinder preheating and segmented injection coordinated calibration, can reliably achieve a successful start-up at extreme low temperatures of -25°C on the first attempt. This eliminates the energy and fuel consumption caused by external heating, reduces system structural complexity and maintenance costs, while fully retaining the core advantages of methanol's clean and low-carbon operation, significantly increasing the methanol substitution rate and meeting energy conservation and environmental protection requirements.

The invention relates to the technical field of internal combustion engines, and provides a methanol engine air inlet device for well drilling and a control method thereof and an engine, the methanol engine air inlet device comprises an air inlet pipeline and an air inlet cavity, the air inlet cavity is provided with a plurality of air outlets, and the air outlets are connected to an air cylinder cover of the engine; a fuel nozzle is arranged opposite to the air outlet direction of the air outlet, and air at the air outlet is mixed with the injected fuel; at least one air heating device is arranged on the air inlet pipeline and used for heating air in the air inlet pipeline. A preheating plug is arranged in a cylinder cover of the engine and used for heating the environment in an engine cylinder. By arranging the air inlet heating device and the in-cylinder preheating module, the temperature of air entering the combustion chamber and the local temperature of the combustion chamber are directly increased, it is guaranteed that combustible mixed gas with sufficient concentration is formed, the ignition process is assisted, and therefore the success rate and stability of low-temperature cold start are remarkably increased.

This invention discloses a sensor with an integrated glow plug, relating to the field of sensor technology. It includes: a carrier, a circuit board, a first terminal, a glow plug assembly, a first housing, a strain gauge, and a connector. The circuit board and the strain gauge are disposed on the carrier, and the connector and the first housing are respectively disposed at both ends of the carrier. The glow plug assembly includes a heating resistor and a second terminal. The heating resistor is disposed within the first housing, and the second terminal is electrically connected to the heating resistor. Both the first terminal and the second terminal are disposed within the connector. This invention can be applied in the harsh environment of engine cylinders, providing pressure signals for precise engine control, and preheating the cylinder during engine startup.

The embodiment of the invention provides a methanol fuel engine ignition control method and device, a vehicle and a storage medium, and relates to the technical field of engines. The ignition control method for the methanol fuel engine comprises the steps that the indoor temperature of an engine combustion chamber is obtained, and under the condition that the indoor temperature is smaller than a first preset temperature, a relay is controlled to apply a first preset voltage to a glow plug for a first preset duration; an air inlet device is controlled to introduce mixed gas formed by methanol and air into an engine combustion chamber, and a spark plug is controlled to ignite the mixed gas; and controlling the relay to apply a second preset voltage to the glow plug for a second preset duration. Before mixed gas is ignited, high voltage is applied to the glow plug for a short time so that the glow plug can be rapidly heated, and the suitable ignition temperature of the mixed gas can be met; and after ignition, low voltage is applied to the glow plug for a long time, so that the glow plug is kept at a stable temperature, the ignition success rate and the combustion efficiency of an engine are improved, and emission and oil consumption are reduced.

The invention discloses an aviation piston engine glow plug test device and test method, and relates to the technical field of glow plug test.The aviation piston engine glow plug test device comprises a GPC connecting port, a glow plug controller and an indicator light, the output end of the glow plug controller is electrically connected with the input end of a glow plug assembly through the GPC connecting port and a wire, and the output end of the glow plug controller is electrically connected with the indicator light; the input end of the glow plug controller is connected with a 28V voltage-stabilized source through a wire harness power supply line, the 28V voltage-stabilized source is electrically connected with the first glow plug, the second glow plug, the third glow plug and the fourth glow plug through glow plug negative electrode lines, and a resistor is arranged between the glow plug controller and the 28V voltage-stabilized source. The device is provided with a glow plug plug-in which is connected with a glow plug cathode wire, a 28V voltage-stabilized power supply can be turned on to supply power to the glow plug component, then whether the head of the glow plug component is red and heated or bulged normally is checked, then a qualification test can be completed, and the test has stability and accuracy.

To provide a control device capable of properly controlling energization to a glow plug, a refrigerating device for transportation, and a control method.SOLUTION: The control device includes an acquisition unit which acquires information indicating a terminal voltage of a starting battery of the engine, a pre-glow period calculation unit which calculates a pre-glow period which is a time from an operation start of a glow plug which heats a combustion chamber of the engine to a drive start of a starter of the engine based on the terminal voltage, a glow plug control unit which turns on the glow plug at a start time of the pre-glow period and turns off the glow plug when starting of the engine is successful, and a prohibition period setting unit which sets a prohibition period which is a period in which turning on of the glow plug is prohibited after the glow plug is turned off.SELECTED DRAWING: Figure 1

The invention provides a high-pressure direct-injection forced-evaporation spark-ignition type diesel rotor engine and a control method thereof. The air inlet pipeline provides controllable clean inlet air for the rotor engine through the throttle valve and the air inlet sensor assembly. An oil supply pipeline forms a high-pressure precise oil supply system through a low-pressure oil pump, a high-pressure oil pump, an oil pressure adjusting valve and a high-pressure direct injection oil injector, and high-pressure injection of the highest 80 MPa is achieved. The exhaust pipeline realizes exhaust waste heat recovery and parameter monitoring through an exhaust heat exchanger, a control valve and an exhaust sensor, the exhaust heat exchanger and a diesel oil tank form a heat exchange loop, and exhaust waste heat at 400 DEG C is used for heating diesel oil to 50 DEG C so as to improve the atomization effect and the combustion process; the high-energy glow plug in the rotor engine cylinder is forcibly evaporated to prevent carbon deposition when a diesel oil beam is close to a spark plug; the electronic control unit ECU is connected with all sensors and actuators, oil injection parameters, the heating temperature of the high-energy glow plug and the opening degree of a throttle valve are dynamically adjusted according to working condition parameters such as the rotating speed and the air inlet pressure, and efficient and stable operation is achieved.

By using water as fuel, the disadvantages of using hydrogen or gaseous and liquid hydrocarbons in known combustion engines are avoided. In the invention, the conversion of water into hydrogen and oxygen takes place solely within the combustion chamber of the combustion engine. As shown in Fig. 1, the water is conveyed from the tank (1) to the high-pressure pump (2) and pumped through an electrically insulated line (3) to an injection nozzle (4). The combustion chamber (10) consists of a cylinder (5) and, at its front, a cylinder head (6) with valves (7), an injection nozzle (4), and a glow plug / heating coil (9), as well as an opposing movable piston (8). The electrically insulated injection nozzle (4) located at the top is positively charged and charges the flowing water with a positive voltage. A high negative voltage is applied to the rest of the combustion chamber. In the combustion chamber, the upward movement of the piston creates gas compression with high temperature and high pressure.Into this atmosphere, the injection nozzle, controlled at very high pressure, injects positively charged water, which then evaporates. As soon as this vapor comes into contact with the rest of the combustion chamber, a current begins to flow, splitting the water molecules into hydrogen and oxygen. The glow plug / heating coil (9) then ignites the oxygen / hydrogen mixture, causing it to explode, which pushes the piston downwards (expansion cycle), thus enabling mechanical work to be performed.

The invention discloses a cooperative control method for a glow plug and a fuel injection quantity in a cylinder in a cold starting process of a diesel engine, which relates to the technical field of cold starting of diesel engines and comprises the following steps: firstly, judging a cold starting condition, and calculating the fuel injection quantity required by the glow plug according to a starting stage (an injection starting period / Ramp period); secondly, through iterative calculation, the final oil injection quantity of the glow plug and the air inlet oxygen content decline value caused by the final oil injection quantity are synchronously determined, and then the effective oxygen mass capable of being used for in-cylinder combustion is obtained; and finally, accurately calculating and executing the in-cylinder fuel injection quantity after collaborative correction according to the effective oxygen mass. According to the method, dynamic accurate matching of the preheating process and the oil injection process is achieved, the first-time starting success rate and the starting speed of the low-compression-ratio and high-supercharge-ratio diesel engine in the low-temperature environment are remarkably increased, and smoking and pollutant emission in the cold starting stage are effectively reduced.

The invention provides an active pre-combustion chamber hot surface ignition composite injection diesel rotor engine and a control method thereof. The exhaust assembly recovers exhaust waste heat of the rotary engine through an exhaust heat exchanger and preheats an air inlet channel and a diesel oil tank so as to reduce the fuel viscosity and improve the thermodynamic state of mixed gas entering a cylinder. A high-energy preheating plug is arranged in the active pre-combustion chamber assembly, and stable ignition of diesel oil is achieved through the hot surface ignition technology. The composite injection assembly adopts a cooperative working mode of an air inlet cavity oil injector and an active pre-combustion chamber oil injector, a single injection strategy or a composite injection strategy is switched according to different working conditions of the engine, and fuel atomization and mixed gas uniformity are optimized; the electronic control unit receives temperature, pressure and rotating speed signals fed back by all the sensors, and ignition parameters, injection pressure, injection time, injection pulse width and heat exchange intensity are adjusted in real time. Stable ignition and efficient combustion are achieved through the synergistic effect of hot surface ignition and composite injection, and meanwhile waste heat recovery is completed through the exhaust assembly.

A system for reducing internal combustion engine emissions includes an engine, a catalytic converter fluidly connected to a combustion chamber via an exhaust line, a glow plug positioned along the exhaust line between the catalytic converter and the combustion chamber, and a flame accelerator, without a fluid connection to a separate fuel supply. Methods of using the system include igniting a mixture of air and fuel in the exhaust line using the glow plug, producing an amount of heated combustion gas.