摘要:
Provided is a testing system which is able to reproduce road surfaces in different states between both right and left tires. A testing system is provided with: a tire speed calculation unit which calculates virtual left and right tire speed values; a vehicle speed calculation unit which calculates a virtual vehicle speed value; a vehicle drive torque calculation unit which calculates left and right vehicle drive torque values; a differential torque calculation unit which calculates left and right differential torque values; and a speed control device which outputs a torque current command signal such that a deviation between a speed command value and a value detected by an encoder is eliminated. The tire speed calculation unit calculates the tire speed value on the basis of the differential torque values and the vehicle drive torque values.
摘要:
An inertia momentum measurement method for an engine, the method including: a first step for measuring a deceleration dωe1/dt of engine output rotation at the time of reduction to a first fuel supply amount which is less than a predetermined fuel supply amount, a second step for measuring a deceleration dωe2/dt of engine output rotation at the time of reduction to a second fuel supply amount which is less than the predetermined fuel supply amount, and a third step for determining the total inertia momentum It on the basis of the following Expression (1): It=(−ΔTe2+ΔTe1)/(dωe/dt−dωe1/dt) (1) where ΔTe1 is an engine driving torque of the engine corresponding to the first fuel supply amount; and ΔTe2 is an engine driving torque of the engine corresponding to the second fuel supply amount.
摘要:
The present invention is able to perform an examination of a motor mounted on EV or HEV (HV) as well as charge and discharge of a battery mounted on EV or HEV (HV), by a single system. The system includes a dynamometer coupled to an output shaft of a motor, a power supply unit for supplying power to the motor or the dynamometer, a motor examination circuit for supplying the power of the power supply unit to the dynamometer and the motor, a battery charge and discharge circuit connected with a battery, for supplying the power of the power supply unit to the battery or discharging the power of the battery, and a circuit switching mechanism for switching between the motor examination circuit and the battery charge and discharge circuit.
摘要:
Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance.
摘要:
To enable testing of a starter motor on a test beach with an electrical dynamometer as a replacement for the real combustion engine, a simulation unit (20) is provided in which a mathematical model of the combustion engine is implemented, and the simulation unit (20) determines a new load setpoint (ns, Ts) using the mathematical model from measured actual values (φi, ni, Ti) of the operation of the electrical dynamometer (3) at every scanning time point of the regulation, which new load setpoint (ns, Ts) is fed to the regulator (21).
摘要:
The present invention is able to perform an examination of a motor mounted on EV or HEV (HV) as well as charge and discharge of a battery mounted on EV or HEV (HV), by a single system. The system includes a dynamometer coupled to an output shaft of a motor, a power supply unit for supplying power to the motor or the dynamometer, a motor examination circuit for supplying the power of the power supply unit to the dynamometer and the motor, a battery charge and discharge circuit connected with a battery, for supplying the power of the power supply unit to the battery or discharging the power of the battery, and a circuit switching mechanism for switching between the motor examination circuit and the battery charge and discharge circuit.
摘要:
A device for measuring torque of an engine has a torque detecting section for detecting an output torque of engine cylinders, a rotation detecting section for detecting a rotation angle of a rotating section to which a piston of each cylinder is connected, a top mark detecting section for detecting the rotation angle of the piston of each cylinder, and a torque calculating section for estimating torque characteristics of each cylinder on the basis of the following: the signal of the output torque, the rotation angle of the rotating section, the rotation angle of the piston of each cylinder, the number of the cylinders of the engine, and the number of cycles of the engine. The torque calculating section estimates, as torque characteristics of each cylinder, either peak torque of each cylinder or the combustion angle at which the peak torque is attained.
摘要:
A test stand arrangement is connected to at least one electric motor (4) connected to a test specimen (1) for driving and/or loading the test specimen (1) and comprises a control arrangement (6) for the or each electric motor (4).In order to be able to create the connection of the drive train and vehicle simulation with the real, vehicle-specific combustion and dynamic behavior of the engine, at least one model (7) for a multi-mass flywheel is implemented in the control arrangement (6), from which model (7) at least a part of the control requirement for the or each electric motor (4) is calculated and which model (7) contains at least the two masses of the primary and secondary side of the multi-mass flywheel and a substitute model for the or each bow spring, and an algorithm is implemented in the control arrangement (6) that analyzes the model for a multi-mass flywheel by means of an integrated time step method.
摘要:
A test stand for an internal combustion engine (1) is equipped with a drive (2) and/or load system (3), a force transmission device (4) with a system (5) for a non-destructive and play-free automatic coupling of the internal combustion engine (1) to the drive (2) and/or load system (3), and a sensor and evaluation system for automatically collecting and evaluating measurement variables. The system (5) for a non-destructive and play-free automatic coupling of the internal combustion engine includes an internally toothed and longitudinally slotted clamping sleeve (12) for receiving an element (13) of the internal combustion engine (1) in a form and force fitting manner, wherein the outer side of the clamping sleeve (12) is conically formed and interacts with a clamping collet (10) which is conically formed on the inside.
摘要:
Test equipment of engine motoring for automatically conducting an engine test includes a conveying mechanism that carries in and carries out an engine to and from a test position, a fixing mechanism that fixes the engine carried in to the test position, a coupling mechanism that directly couples an electrical motor to the engine and can detect drive torque, an encoder that generates a pulse signal as an operating standard in synchronism with rotation of the electrical motor, a plurality of detection units driven to reciprocate so as to be connected to and disconnected from or approach and separate from the engine positioned at the test position and detect a plurality of operating state quantities, a control unit for various driving controls, and a judging unit for judging whether the engine is normal by comparing information obtained by the plurality of detection units with standard information obtained in advance.