2644 results about "Dynamometer" patented technology

The invention relates to a dynamic load simulating device and a dynamic load simulating method for an automobile power system test, and belongs to the technical field of vehicle power system tests. The dynamic load simulating device comprises a control computer, a dynamometer controller, a frequency converter, an alternating current (AC) power dynamometer and a torque flange with a controller. A virtual automobile model-based control algorithm is adopted, a virtual automobile model is driven by an actual measurement torque, and the simulation of the rolling resistance, wind resistance and the inertia resistance of a vehicle is realized under the conditions of not calculating angular acceleration of the dynamometer. The dynamic load simulating device and the dynamic load simulating method have high stability and high simulation precision, are favorable for shortening the development cycle of an automobile power system and providing convenient test environment for the development of the power system. A process that the vehicle acceleration is acquired by differentiating the rotation speed of the automobile power system is avoided in the calculation process, and a phenomenon that accurate differential values are difficult to acquire due to relatively large noise caused by the process of differentiating the rotation speed is prevented.

The invention discloses a hybrid electric vehicle power assembly durability testing frame and a testing method. A dynamometer is connected with an engine and a tooth ring through an ISG motor which is electrically connected with an inverter; a rotation speed sensor which is arranged at the external side of the tooth ring is connected with an instrument controller; a frame control system respectively emits test control signals to a hybrid electric control system, an engine management system and a dynamometer; the hybrid electric control system receives external signals and initiates the requirements of starting or stopping and torque to the engine management system and the motor control system according to a self-control strategy. The frame control system (PUMA) controls the operation of the dynamometer by a pre-arranged speed curve and a torque curve, thus leading the engine to run under the working conditions defined in advance. The distribution of motor torque and engine torque and the auxiliary driving torque of the motor are controlled by the hybrid electric control system according to the rotation speed of the engine and the torque requirement.

The invention relates to a test method of automobile transmission system efficiency, which comprises the following steps: a variable frequency and variable speed motor is connected with an automobile transmission system through a revolution speed and torque sensor; two eddy current dynamometers are respectively connected with two half shafts of the automobile transmission system through the revolution speed and torque sensor; a speed variator of the automobile transmission system is positioned at a certain shift; the target rotation speed of the two half shafts under the rotation speed of a certain variable frequency and variable speed motor is determined according to the transmission ratio; the variable frequency and variable speed motor is started, the eddy current dynamometers load the two half shafts respectively so that the two half shafts can reach the target rotation speed, and then the product of the sum of the torque of the two half shafts and the rotation speed of the half shafts is the output power of the automobile transmission system; and the output power and the product of the torque and the rotation speed of the variable frequency and variable speed motor are compared to obtain the transmission efficiency of the automobile transmission system. The test method is simple, and has quick dynamic response and high testing precision.

The present invention relates to test table for driving motor of hybrid electric vehicle to finish capability test of driving motor of hybrid electric vehicle and debugging function of control software. The table system has simple structure, convenient operation and maintains and high test precision. When the grades of motor and load voltage are identical, the system can work parallel with DC generatrix and feed back energy, the energy lose is less, the power supply need to provide system loss energy is about 10% to 20%, the cost is reduced greatly and the requirement of capacity of power supply is little. When the grades of motor and load voltage aren't identical, two complexions are happened, when motor is as driver, energy is applied to load resistance box by dynamometer system or power supply; when the motor is as generator, the energy is applied to load resistance box by power supply.

A residual ratio factor characterizing the amount of residual exhaust gas left in a selected cylinder at the end of a piston intake stroke is determined from tabular and surface models based on previously gathered dynamometer data from a test vehicle at various engine speeds. The residual ratio factor is then used to calculate the mole fractions of air and residual exhaust gas in the selected cylinder, which, in turn, are used to determine mass airflow at an engine intake port at the end of the intake stroke. The mass airflow can then be used to derive further models for determining an engine operating parameter, such as fuel/air ratio, required for achieving at preselected vehicle operating condition.

A dynamometer comprises a frame, an inertial flywheel, and a starter motor. The inertial flywheel is supported by the frame and the starter motor is movably mounted to the frame so as to be selectively engageable with the inertial flywheel. Means is provided for coupling an engine to be tested to the apparatus. The flywheel is brought up to speed by means of the starter motor and then coupled to the engine, which has been separately brought up to speed, via a clutch. The flywheel is supported by the frame in pressurized oil sleeve bearings.

The invention discloses a vehicle driving condition establishment method combining principal component analysis with fuzzy c-mean clustering. The method comprises the steps of extracting satellite positioning data of each road traffic condition in a vehicle dynamic monitoring system of a road transport enterprise, and calculating and dividing the data into small sections of micro-strokes; and performing calculation of characteristic parameters such as an average speed, an idle time proportion and the like for each micro-stroke, obtaining a matrix of a sample quantity (row) X the characteristic parameters (column), adopting mean normalization and principal component analysis for matrix data, selecting preorder principal components which meet the conditions that the cumulative contribution rate of characteristic values of the principal components is greater than 85% and the principal components can comprehensively reflect all the characteristic parameters, performing fuzzy c-mean clustering analysis on scores of the principal components, and clustering the micro-strokes into different groups, namely, screening sub-conditions. An initial synthesis condition is smoothed by adopting a filter with a double-weighted smoothing kernel function. According to the method, existing satellite positioning data is fully utilized; compliance testing is easily carried out on a dynamometer; relatively high universality is achieved; and the research cost of vehicle driving condition establishment is reduced.

The invention relates to a test device of a machine tool spindle, in particular to a machine tool spindle reliability test bed based on mixed loading of electro-hydraulic servo and a dynamometer, and aims to solve the problem that the conventional machine tool spindle reliability test device cannot truly simulate dynamic cutting force loading, static cutting force loading and cutting torque loading. The machine tool spindle reliability test bed mainly comprises a machine tool spindle supporting part, a torque loading part and a cutting force loading part, wherein the machine tool spindle supporting part is formed by combining a spindle box base plate (14) and an iron gasket (15); the torque loading part consists of a loading rod (12), an elastic diaphragm coupler (9) and the dynamometer (8), which are coaxially assembled; and the cutting force loading part employs two loading modes, namely a cutting resultant force loading mode and a cutting axial force and radial force separated loading mode. By performing reliability test for simulating true working conditions on the tested machine tool spindle, the failure of a product is stimulated and exposed, and practical basic data are provided for reliability growth and evaluation of the product.

The invention discloses a spherical contact type friction characteristic testing device under ultrasonic vibration. The device consists of a main movement unit, a loading unit and a dynamometer unit, wherein the torque output by a step motor is converted into axial pressure of a sliding table through a lead screw nut pair of a trapezoidal screw, and an upper sample and a lower sample which are arranged at the bottom of a piezoelectric micromachined ultrasonic transducer are contacted with each other, and certain pressure is applied to the lower sample; when the piezoelectric micromachined ultrasonic transducer is connected with an ultrasonic power supply, the upper sample produces ultrasonic frequency vibration with micron-grade amplitude in the horizontal direction or the vertical direction, the lower sample rotates together with a rotating platform and forms a friction pair with the upper sample, so that the friction characteristic of the spherical contact under ultrasonic vibration can be tested. The device can be used for accurately controlling the testing parameters, is high in degree of automation, and can be used for performing spherical contact friction experiments of various types of friction materials under different ultrasonic vibration frequencies and vibration amplitudes.

A device and corresponding method for enabling a user to accurately control, monitor, and evaluate performance of a vehicle. The system includes a portable programmable computer device that a user can readily install by plugging it into a diagnostic connector port of the vehicle for providing the controlling, monitoring, and evaluating functions. The present invention enables a user to perform performance tuning of the engine, provides dynamometer type functions such as horsepower and torque measurements, and provides a virtual drag strip function for accurately measuring acceleration data. According to an alternative embodiment, a monitor mode is provided for enabling the user to monitor selected characteristics of the vehicle and a diagnostics mode is provided for providing for the identification and display of diagnostic trouble codes (DTCs) with informative text descriptions. The present invention also enables the clearing of selected DTCs without requiring expensive customized equipment for that purpose.

The invention relates to a test stand system of an electric automobile driving motor, which comprises a dynamometer system and a measured motor system, a speed reducer is installed between the dynamometer system and the measured motor system and used for adjusting the rotary speed of the measured motor in the measured motor system, the electricity of the dynamometer and the measured motor is respectively supplied by two sets of power supplies, a stand motor is arranged in a feedback electric network at an alternating current end, the measured motor can have a wider voltage range, and the standsystem has high efficiency and can carry out hardware-in-loop test for electric automobile power assemblies.

A test apparatus for measuring surface friction of a damping material such as brake pad insulator material includes a rotor configured to support the damping material for rotation therewith, an actuator pressurizable to apply axially-inward force to the damping material and a stator configured to support the actuator. A sensor determines the force applied to the actuator and a torque cell is axially aligned with the rotor for measuring torque of the rotor in relation to force applied to the damping material. The calculation of surface friction of the damping material is possible based on the measured load and torque. A method of measuring surface friction of a brake pad insulator material as well as a method using a brake dynamometer is also presented.

The invention discloses a comprehensive test platform and a comprehensive test method for a dynamic system of a fuel cell hybrid electric vehicle. The platform comprises an industrial control console operation unit, a lithium cell pack unit, a fuel cell unit, a direct-current/direct-current (DC/DC) converter, a tested motor unit, an alternating-current power dynamometer unit, a switching execution unit and a resistive electronic controllable load, wherein the industrial control console operation unit communicates with all the other units through a data acquisition card, a controller area network (CAN) card and a CAN bus, and simulates to manage the whole comprehensive test platform. According to the comprehensive test platform and the comprehensive test method, comprehensive test functions of testing the performance of a fuel cell system, a lithium cell pack and a tested motor and managing the energy of the dynamic system is realized.

The present invention provides an automatic test method and apparatus for vehicle air conditioner compressor electromagnetic clutch dynamic torsional moment, comprising a mainly supporting component (2), a torque revolution speed transducer (3), an electric eddy current dynamometer (4) and an electrical control system, wherein the electromagnetic clutch (1) is installed on the left end of the supporting component to form a cantilever structure, and is driven to rotate through a belt pulley of the electromagnetic clutch driven by a frequency conversion motor; the right end of the supporting component is linked with the torque revolution speed transducer and the electric eddy current dynamometer separately by a coupling, the torque revolution speed transducer and the electric eddy current dynamometer are both installed on each seat to ensure the axiality to be consistent with the supporting component main shaft. The automatic test method and apparatus can simulate air conditioner electromagnetic clutch actual use condition factually, test dynamic parameter variation regularity with the existing of revolution speed spectrum and torque loading spectrum, observe and research dynamic procedure in full, and provide science foundation for evaluating performance, lifetime and reliability thereof.

Methods for measuring the leakage rate of a downhole pump using either measured axial load information from the drive rod string or using measured production data. The invention is for methods of applying the leakage rate to a downhole dynamometer card, for a reciprocating rod pump, for determining well production.

A hybrid driven vehicle transmission system performance test platform includes engine, speed torque sensor, ISG motor, transmission link support box, cross universal joint, electricity dynamometer, fuel consumption meter, control system, and others. The speed torque sensor is installed between the engine and the ISG motor, and the ISG stator connects to the clutch, and the transmission link support box and ISG motor stator are installed together to the engine installation surface; in the transmission link support box installs the transmission shaft, and the spline of the transmission shaft connects with the spline in the clutch friction chip, and the flange end of the transmission shaft connecting with the cross universal joint, the cross universal joint connecting with the power dynamometer. The invention integrates engine, motor and control system, increasing the speed and torque sensor and the transmission link support box, reducing the torque fluctuation in the transfer process, and it can respectively control the engine, motor speed and torque, and measure the parameters of system fuel consumption, battery voltage, current, charge state, and others.

The invention discloses a loading device for testing the permeability of concrete chloride ions, which comprises a longitudinal loading system and a lateral loading system, wherein the longitudinal loading system comprises a longitudinal bearing steel plate, an 'L'-shaped positioning piece, a lateral high-strength transmission screw, a longitudinal steel base plate, a longitudinal dynamometer, a longitudinal ball seat, a longitudinal loading steel plate, a longitudinal hydraulic jack, a longitudinal fixing steel plate and the like; and the lateral loading system comprises a lateral bearing steel plate, an 'L'-shaped test piece block, a longitudinal high-strength transmission screw, a lateral steel base plate, a lateral dynamometer, a lateral ball seat, a lateral loading steel plate, a lateral hydraulic jack, a lateral fixing steel plate and the like. The invention also relates to a test method for testing the permeability of the concrete chloride ions by utilizing the loading device. The loading device and the test method solve the problems that the conventional device for testing the permeability of the concrete chloride ions cannot load tested pieces, cannot simulate the actual load condition of the conventional concrete and cannot measure the permeability of the concrete chloride ions under the condition of pressure load.

The invention discloses a dynamic loading device for a high-speed motorized spindle. The device comprises a supporting part and a loading part, wherein the supporting part comprises a spindle base, an axial loading bracket, a radial loading base plate and a dynamometer base. The spindle base comprises a spindle base plate, an adjusting base plate and a clamping mechanism. The loading part comprises a radial loading mechanism, an axial loading mechanism, a torque loading mechanism, a loading rod and a bearing unit. The torque loading mechanism comprises a power dynamometer and a high-speed spring tube coupling. The adjusting base plate and the clamping mechanism are overlapped on the spindle base plate and are fixedly connected with each other; the power dynamometer is fixed on the dynamometer base and is connected with the right end of the loading rod through the high-speed spring tube coupling; the left end of the loading rod is connected with the right end of a detected high-speed motorized spindle which is arranged in the clamping mechanism. The bearing unit is sleeved on the loading rod; the radial loading mechanism is arranged on the radial loading base plate and is positioned just below the bearing unit; and one end of the axial loading mechanism is arranged on the axial loading bracket, and the other end of the axial loading mechanism is in contact connection with the bearing unit.

The invention discloses a method for predicting a turning force based on cutter angle and parameter variation of cutting data. The method comprises the following steps: using a dynamometer to measure a cutting force distributed along a coordinate axis of a coordinate system in one-time turning, calculating a three-way turning force coefficient of the cutting force in a converted coordinate system through converting the coordinate system, and calculating and obtaining the predicted turning force according to the factor of the cutting force, so as to achieve prediction of a three-way turning force for processing work pieces made from the same material and having the same heat treating state under the same cutting and lubricating conditions of the cutters made from the same material at any cutter angle parameter and cutting data parameter. The method for predicting the turning force needs little workload for cutting experiments, and the obtained cutting force models have wider application application, have predicting precision meeting actual demand, and are convenient to popularize and apply.

The disclosed measuring apparatus and method for frictional moment comprise: the target bearing with diameter as D is suspended a segment nylon wire with ends connected to weight and dynamometer respectively, when bearing static, the show value on dynamometer as A1 balances to the weight; if rotating toward one direction by some rate, the show value increases to A2, and the formula M=(A2-A1) .D/2 can express the corresponding frictional moment. This invention is reliable, simple, and well practical.

A method and a device for dynamometer testing of a motor vehicle (1), having a front end and a rear end and a right side and a left side, as seen in a driving direction, and/or vehicle components, by measuring torque and rotational speed on drive shafts (3_LF, 3_RF, 3_LR, 3_RR) of the vehicle, wherein a braking torque is applied to each one of said shafts by individual hydraulic dynamometer test units by throttling hydraulic fluid flows, and wherein said braking torque is adjustable for each individual one of said drive shafts (3_LF, 3_RF, 3_LR, 3_RR) such that a resulting individual rotational speed for that shaft corresponds to a virtual vehicle speed when driving the motor vehicle on a road, compensated with a slip value.

The invention discloses an in-loop simulation test system and test method for a vehicle management system. The test system comprises a hybrid power system stand and an in-loop test bench for being in communication connection with a vehicle management system to be tested. The hybrid power system stand comprises an engine and a main motor which are mutually connected as well as a load dynamometer which is connected with the main motor. By enabling an actual hybrid power drive system to be combined with a conventional hardware-in-loop simulation system, the vehicle management system to be tested is allowed to be in a real vehicle power drive system in a simulation manner, thereby improving vehicle management system software development quality and precision, reducing real vehicle road test times, reducing development time and cost, and reducing road test process risk; meanwhile, vehicle power performance test can be achieved; and through matching optimization of the power system, the whole performance of the vehicle is improved.