17 results about "Crankshaft position sensor" patented technology

The invention discloses a hybrid vehicle engine front-end wheel train control method and device and a storage medium, and the method comprises the steps: collecting a running signal of a hybrid vehicle, and judging the start-stop working condition trend of an engine of the hybrid vehicle according to the running signal; under the condition that the start-stop working condition trend is that shutdown is about to be carried out, shutdown preparation operation is carried out, and the shutdown preparation operation comprises the steps that a front-end wheel train load is removed through an electromagnetic clutch water pump and / or a transmission chain between an engine and a gearbox is tensioned through pre-tightening torque output by a P2 motor; and under the condition that the start-stop working condition trend is about to start, starting auxiliary operation is executed, and the starting auxiliary operation comprises the steps that a signal of a crankshaft position sensor is combined, auxiliary torque is output through a P2 motor to smoothen engine crankshaft rotation, and / or after the engine rotating speed is stable, an electromagnetic clutch water pump is controlled to load a load for a front end gear train. According to the technical scheme, torque impact of starting and stopping of an engine on a front-end wheel train can be reduced from the source, and the problems of vibration and noise of the wheel train are solved.

The utility model relates to a crankshaft position sensor with a double-layer waterproof structure, comprising a housing, a pin, a Hall circuit board, a sealing member and a side cover, two ends of the housing are respectively provided with a socket part and an installation part, the pin is arranged in the housing, and two ends of the pin respectively extend to the socket part and the installation part. The mounting part is clamped with a Hall circuit board used for being electrically connected with a contact pin, the mounting part is in threaded connection with a side cover, the mounting part is clamped with a sealing piece used for being in sealing connection with the side cover, and the sealing piece is provided with a first sealing part used for abutting against the end face of the side cover and a second sealing part used for abutting against the inner side face of the side cover; according to the crankshaft position sensor, the first sealing part and the second sealing part are integrally formed on the sealing piece, axial sealing and radial sealing of the connecting position of the shell and the side cover are achieved through the first sealing part and the second sealing part respectively, the waterproof performance of the crankshaft position sensor is remarkably improved through two innovative sealing structures, and the service life of the crankshaft position sensor is remarkably prolonged through the two innovative sealing structures.

The present disclosure relates to an engine-motor integrated active damping control method based on principal component analysis and a motor controller. Under the premise of not significantly increasing the hardware cost of the motor controller, the damping control is sunk to the inside of the motor controller to realize engine-motor integration, actively damping by using the high bandwidth advantage of the motor controller, and significantly reducing the damping waveform storage demand and the test bench calibration workload. The present scheme reduces the damping waveform storage demand and the test bench calibration workload by storing the principal component analysis waveform and the principal component function; realizes smooth damping in a continuous working condition range through interpolation reconstruction; realizes engine-motor integration by introducing the engine crankshaft position sensor signal into the motor controller to directly obtain the engine crankshaft angle in future crankshaft angle prediction.

The invention belongs to the technical field of generator control, and relates to a non-inductive control method, system and device for a range extender generator and a medium. Signal sampling is carried out through a signal panel and a double-edge triggering mode, and a crankshaft sampling rotation angle is obtained; the starting position of crankshaft rotation is judged according to the crankshaft sampling rotation angle and a tooth missing signal in the crankshaft position signal, and the crankshaft rotation angle is recorded in real time; compensating a crankshaft rotation angle in real time through the average angular velocity and the average angular acceleration, and converting the compensated crankshaft rotation angle into an electrical angle to obtain a rotor rotation angle; and controlling the permanent magnet synchronous generator through a field-oriented control algorithm according to the rotor rotating speed and the rotor rotating angle. According to the method, the crankshaft position signal is obtained through the crankshaft position sensor, the crankshaft position signal is analyzed to obtain the rotor position information, and the problems that an existing non-inductive control method is low in precision and poor in reliability in control over the permanent magnet synchronous generator in the range extender are solved.

This application relates to a variable valve timing control system and its control method, device, and equipment, belonging to the field of engine testing technology. The system includes: an engine electronic control unit (ECU), used to receive crankshaft position sensor signals and camshaft position sensor signals from the engine, determine the actual valve timing of the camshaft, and generate an oil control valve control signal based on the actual valve timing and a preset target valve timing; the oil control valve control signal is used to control the oil control valve to adjust the actual valve timing to the preset target valve timing; and a data conversion module, connected to the ECU, used to receive crankshaft position sensor signals, camshaft position sensor signals, engine motor feedback signals, and oil control valve control signals in real time, generate a motor drive signal, and transmit the motor drive signal to the motor. Using this system can reduce testing complexity.

The invention discloses a hybrid power generator vector control method and system based on a crankshaft position sensor. The method comprises the following steps: constructing a rigid coupling mapping model from a crankshaft angle to a generator electrical angle; in a first stage of starting the generator, executing vector control of the generator by taking the first estimated electrical angle as a motor rotor electrical angle; in the second stage of starting the generator, judging the size of the first estimated electrical angle; if the first estimated electrical angle meets a set condition, determining a generator electrical angle based on the crankshaft angle, and determining a motor rotor electrical angle according to the generator electrical angle to execute vector control of the generator; otherwise, vector control of the generator is performed with the first estimated electrical angle as the motor rotor electrical angle. According to the method, the rigid coupling mapping model of the crankshaft angle and the generator electrical angle is constructed, and the vector control is executed by adopting different electrical angle estimation strategies in stages, so that the hardware cost is effectively reduced while the control precision is ensured, the system reliability is improved, and the starting delay is eliminated.

This application relates to the field of automotive repair tool technology, and discloses a tooling and method for disassembling and assembling an engine crankshaft position sensor. The tooling includes a nylon block, a positioning bolt, and a ball-end hex wrench. The nylon block has a first through hole and a second through hole on its side wall. The positioning bolt passes through the first through hole, and the ball-end hex wrench passes through the second through hole. One side of the nylon block is fitted against the side of the engine housing. The central axis of the ball-end hex wrench, located inside the second through hole, is collinear with the central axis of the crankshaft position sensor fixing bolt. A positioning rubber sleeve is fitted over the ball-end hex wrench, and the positioning bolt is a hexagonal bolt. This invention improves the efficiency of disassembling and assembling the crankshaft position sensor and solves the problems of inaccurate tool alignment in narrow engine compartments with obstructed visibility, and the difficulty of applying force by hand in confined spaces, which can easily cause the fixing bolt to fall off.

The utility model discloses a crankshaft position sensor convenient to adjust, which comprises a body, a mounting seat is fixed on the body, an empty groove is arranged on one side of the mounting seat far away from the body, a fixing sleeve is arranged in the empty groove, an adjusting component is arranged on the outer side of the fixing sleeve, and the adjusting component is arranged on the outer side of the fixing sleeve. The adjusting assembly comprises guide grooves symmetrically formed in the mounting base, guide bases are slidably connected into the guide grooves, and a connecting base is fixed to the side, away from the body, of the mounting base. Through the arrangement of an empty groove, a fixing sleeve and an adjusting assembly, when the crankshaft position sensor is installed, a worker can use an adjusting lead screw in the adjusting assembly according to the position of an installation hole in a shell, and the adjusting lead screw rotates along an installation base and drives the fixing sleeve and a guide base to horizontally move along a guide groove through a connecting base; therefore, the horizontal position of the fixing sleeve is adjusted, the universality is high, use requirements are met, and practicability is improved.

The invention provides a computer-implemented method for estimating engine torque from an internal combustion engine (ICE) wherein the ICE includes a plurality of engine cylinders (14), a fuel delivery system (40) with a plurality of fuel injectors (34) arranged to selectively inject fuel in respective cylinders (14), an exhaust gas pressure sensor (64) arranged to generate a sensor signal in response to a pressure of exhaust gas from said ICE, and crankshaft position means (50.1) for generating signal(s) indicative of crankshaft (18) position within a cycle of said ICE. Injection events are performed to inject predetermined amounts of fuel via said injectors (34), in order to perform combustion events that generate torque and exhaust gas by combustion of said fuel amounts. According to the invention, the method comprises the steps of:  monitoring exhaust gas pressure over a predetermined analysis window corresponding to a combustion event in a respective cylinder (14), thereby obtaining exhaust pressure data;  processing the exhaust pressure data by computing an average pressure value of the exhaust pressure data and determining a pressure waveform from the pressure data;  feeding the average pressure value and the pressure waveform as inputs to a pre-trained neural network to output an estimated torque. A method of diagnosing an ICE is also presented that outputs an indicator of a presence or an absence of engine faults such as misfires, valve timing issues, and / or exhaust system blockages.

Procedures for phase diagnosis, comprehensive: Performing an injection using an injector at top dead center of a compression stroke, when it is recognized that an engine position is valid, Detect (202) whether an engine is accelerating, based on a crankshaft signal detected by a crankshaft position sensor; Performing (203) an injection by means of the injector at the top dead center of an exhaust stroke when no acceleration is detected; Detect (204) whether the engine is accelerating, based on the crankshaft signal detected by the crankshaft position sensor, and; Detecting a camshaft phase deviation of 180 degrees based on a camshaft signal from a camshaft position sensor and the crankshaft signal detected by the crankshaft position sensor when acceleration is detected. including injection at top dead center of the exhaust stroke and detection of whether the engine is accelerating: the injection at the top dead center of the exhaust stroke; Detect whether the engine is accelerating; Detect (205) whether a preset number of injections has been reached when no acceleration is detected; Return to step (203) Performing an injection by means of the injector to top dead center of the exhaust stroke if the preset number of injections has not been reached; Terminate (206) injection when acceleration is detected or the injector reaches the preset number of injections.

The invention provides a hybrid electric vehicle engine starting control method and system. The method comprises the steps that the instantaneous change rate of the rotating speed of an engine is calculated; determining a first torque correction coefficient; calculating a first correction torque; according to the current engine rotating speed and the relation between the preset rotating speed and the subareas, the subarea where the current engine rotating speed is located is determined; calculating the engine speed average change rate of the partition where the current engine speed is located; determining a second torque correction coefficient; calculating a second correction torque; and calculating the required output torque for starting the engine to start the engine. According to the hybrid electric vehicle engine starting control method and system, the change rate of the rotating speed of the engine is controlled, and the torque of the ISG motor is adjusted; starting in different engine states can be coped with, and better vehicle NVH performance is achieved. Crankshaft position information and a crankshaft position sensor are not needed, so that the cost is saved; the system structure complexity is reduced, and the fault rate is reduced.

The invention discloses a gas time-sharing gas inlet method based on crankshaft synchronizing signal control, which belongs to the technical field of internal combustion engines, and comprises a gas supply channel which is arranged independent of an air inlet channel and is used for guiding gas to a cylinder, and a gas control valve is arranged on the gas supply channel; the servo motor is connected with the gas control valve and used for driving the gas control valve to execute opening or closing action; the crankshaft position sensor is used for detecting the rotating angle of an engine crankshaft in real time and generating a crankshaft synchronizing signal; and the electronic control unit is electrically connected with the crankshaft position sensor and the servo motor, receives the crankshaft synchronizing signal, judges the real-time phase of the engine according to the crankshaft synchronizing signal, and controls the servo motor to drive the gas control valve in the air inlet stroke, so that the gas control valve is kept closed in the air valve overlapping stage of the air cylinder and is opened after the air valve overlapping stage is ended. The invention aims to fundamentally solve the problems of mixed gas escape and tempering in the valve overlap angle period, and meanwhile, the economical efficiency, the dynamic property and the emission level of the engine are improved.

The invention discloses a two-stroke piston engine air inlet control system and method based on steering engine angle feedback, and relates to the technical field of aviation and power machinery. The system comprises a CAN bus digital feedback steering engine, an electronic control unit (ECU), a crankshaft position sensor, an oil injection control module and a mechanical throttle valve structure, and four throttle valves of the horizontally-opposed four-cylinder engine are controlled to act synchronously through linkage of the single steering engine. The control method is characterized in that an angle detection unit of the steering engine is used for collecting the rotation angle of an output shaft, the rotation angle is transmitted to an ECU through a CAN bus, the rotation angle is directly mapped into the opening degree of a throttle valve through a built-in program or algorithm of the ECU, and a traditional throttle valve position sensor (TPS) is omitted; the ECU calculates oil injection parameters by combining the crankshaft rotating speed and the phase signals, drives the oil injector to act, and meanwhile adjusts the opening degree of the throttle valve in real time through closed-loop control. The system structure can be simplified, the cost is reduced, the whole control system is more compact, the signal transmission reliability is improved, the response speed is increased, and the system is suitable for light aircraft power systems such as small unmanned aerial vehicles.

This invention discloses a method, apparatus, device, and medium for position analysis of a variable valve timing system. The method includes: acquiring sensor signals from a crankshaft position sensor and a camshaft position sensor of a preset engine during cold-engine testing; analyzing the real-time position information of the variable valve timing system of the preset engine based on the sensor signals; and determining the position state of the variable valve timing system based on the real-time position information and preset standard reference position information. This embodiment achieves position signal analysis of the variable valve timing system. By detecting the position of the variable valve timing system through the collected crankshaft and camshaft signals during cold-engine testing, the position state of the variable valve timing system is determined. This solves problems such as poor target wheel dimensional accuracy and camshaft position sensor malfunction before engine hot-test testing, ensuring the safety of the prototype.

The utility model relates to the technical field of crankshaft position sensor, especially is with the hall chip detection function's crankshaft position sensor, including the shell and the first wiring terminal of setting at the upper end of shell, the loading cavity inner wall is connected with the loading cover, the first inner hexagonal groove both sides inner wall all are equipped with the threaded hole, two the threaded hole inner wall all are connected with the stud screw thread, the inside of guiding chamber is connected with the framework through the abutting device, the circuit board of the utility model is connected with the framework through the connecting device and will not be loaded cover touches, under the connection effect of first lead column, second lead column and connecting block, make the circuit board and the framework all be in the electric connection state, through the screwing stud screw, make the stud screw one end abut the loading cavity inner wall, avoided the appearance slight rotation of loading cover, guarantee not to influence the inductive accuracy of hall chip.

The application discloses a waterproof automobile crankshaft position sensor production equipment and process, which is applied to the technical field of crankshaft position sensor production, and is characterized in that a machining table, a lower mold placing box, a lower mold concave frame, a mold lifting assembly, a mold upper assembly and a supporting assembly are arranged, injection material is injected into the lower mold concave frame, the bottom of the lower mold concave frame is blocked by the mold lifting assembly in the lower mold placing box, then the mold upper assembly is started to be lowered and is attached to the lower mold concave frame, in the process, the supporting assembly on the bottom side in the lower mold placing box supports and reinforces the mold lifting assembly, then the mold upper assembly returns to the initial position after the crankshaft position sensor shell is cooled and formed, then the mold lifting assembly is started to be moved upwards in the lower mold concave frame, so that the formed crankshaft position sensor shell is automatically pushed into the lower mold concave frame.

The utility model relates to an integrated crankshaft position sensor, which comprises a sensor main body, a plug wire seat, a side cover, a wire harness and a buckle, the plug wire seat is provided with an open slot used for connecting the sensor main body, a groove used for bonding the side cover and an interface end used for connecting the wire harness, the sensor main body is sleeved between the plug wire seat and the side cover, and the buckle is arranged on the plug wire seat. The sensor main body is provided with a contact for signal transmission, the contact passes through the open slot and extends to the interface end, one end of the wire harness passes through the interface end and is electrically connected to the contact, and the wire harness is clamped to the interface end through a buckle; the utility model mainly aims to integrate the crankshaft position sensor, avoid the phenomenon of looseness among parts, remarkably improve the anti-vibration effect and the sealing effect of the sensor, and prolong the service life of the sensor.