摘要:
Electrical actuator having a stator body and a rotor body which is pivotable iN the stator body through an angle of rotation. The actuator further comprises energizing means for exerting an electromagnetic torque on the rotor body and a control unit for controlling the angle of rotation. The control unit has a cascade control structure with a first control member for converting an electrical input signal corresponding to a required angle of rotation into an electrical intermediate signal corresponding to a required electromagnetic torque to be exerted on the rotor body and with a second control member for converting the intermediate signal into an output signal corresponding to a required electrical current through the energizing means. The first and second control members allow for specific intermediate calculations of the required electromagnetic torque and the required current, whereby the response time and accuracy of the control unit are improved.
摘要:
Action force of a wheel is measured in order to measure the road surface frictional force, vertical drag, road surface friction coefficient, etc. Means for making these measurements can be constituents of an antilock brake system, traction control system, etc. These constituents may also serve as devices for measuring stresses generated in other structures. In a specific example, axle of a vehicle is formed with a hole, a stress detection sensor is installed in the hole and secured in position with the aid of a spacer element, and a detection signal from the stress detection sensor is processed in a signal processing circuit.
摘要:
An engine unit having a throttle valve drive unit constructed so as to cause a throttle valve to rotate and stop at a desired angular position, characterized in that the throttle valve drive unit comprisesa synchronous motor for driving the throttle valve,a damping means for damping the rotation of the throttle valve,a voltage supply means for supplying d-c voltage to the synchronous motor, anda supply voltage control means for controlling the d-c voltage outputted by the voltage supply means;the throttle valve being adapted to stop at an angular position at which the rotational torque generated by the synchronous motor in accordance with the supply voltage of the supply voltage controlling means and the damping torque of the damping means are balanced.
摘要:
For controlling a solenoid actuator in PID control mode in response to input control information, the temperature of the coil of the solenoid actuator is detected or estimated, and the constant or constants necessary for PID control calculation are determined taking into account the resulting temperature. The input control information is subjected to the processing operation for PID control operation by the use of the determined constant or constants, whereby desired PID control characteristics can be obtained irrespective of changes in the temperature of the coil of the solenoid actuator. As a result, in particular, the step response and other dynamic characteristics can be improved.
摘要:
In an output control apparatus for an internal combustion engine according to this invention, a target torque of a driving shaft of an automobile is determined in accordance with the pedaling stroke of an accelerator pedal, and a deviation between the target torque and an actual torque of the driving shaft is obtained. On the assumption that the whole system of the automobile, including the internal combustion engine, is in a steady-state operation mode, on the other hand, a steady-state output torque of the internal combustion engine, required for applying the target torque to the driving shaft, is obtained. In the output control apparatus, moreover, a steady-state suction air amount of the internal combustion engine is obtained such that the steady-state output torque is obtained in the internal combustion engine, and this steady-state suction air amount is corrected in accordance with a feedback amount based on the aforesaid deviation, so that a target suction air amount of the internal combustion engine is determined, and the opening of a throttle valve is controlled so that the target suction air amount can be obtained.
摘要:
A device for controlling idling operation of an internal combustion engine comprising an actuator operatively connected to a throttle valve for controlling the opening degree of the throttle valve during engine idling operation, an actuator position sensor for sensing an operating position of the actuator, a first control unit adapted to receive output signals from an engine RPM sensor, a water temperature sensor which senses the temperature of engine cooling water and the actuator position sensor to control the operation of the actuator such that the opening degree of the throttle valve is adjusted to an appropriate level to maintain the RPMs of the engine during idling at a predetermined value corresponding to the sensed temperature of the cooling water, and a second control unit independently operated from said first control unit to control the operation of the actuator in accordance with the operating position of the actuator and the temperature of the cooling water so as to limit the operating position of the actuator and thereby limit the RPMs of the engine to the predetermined value corresponding to the sensed temperature of the cooling water notwithstanding a higher value of RPMs being called for by the first control unit. As a result, abnormal increases in RPMs during the idling operation of the engine are prevented even when the first control unit malfunctions.
摘要:
An improved fuel injection system of the type in which the fuel injection timing and the fuel injection rate vary with the plunger pre-stroke which is regulated by displacing a control sleeve slidably fitted on a plunger reciprocating at a non-uniform speed and in which the actual injection quantity varies with the pre-stroke. The fuel injection system comprise an engine operating condition sensor, a pre-stroke control means, and a control sleeve driving means that cooperate to adjust the plunger pre-stroke. The amount of pre-stroke is detected by a position sensor. The position sensor and the engine operating condition sensor deliver respective outputs to a correction arithmetic means which computes the amount of deviation and thereby the amount of correction based on the outputs delivered. The arithmetic means sends an output signal indicative of the amount of correction to an injection quantity control means which in turn corrects the object injection quantity and then delivers a control signal to a plunger driving means by means of which the plunger is rotated, thereby adjusting the effective stroke of the plunger according to the amount of pre-stroke.
摘要:
A method of optimizing the noise generated by a hybrid power plant of a rotorcraft in flight, the hybrid power plant driving a main rotor of the rotorcraft in rotation and being provided with at least one engine, with at least one electric machine, and with at least one electrical energy source that electrically powers the electric machine. The method includes a determination step for determining a required power delivered by the hybrid power plant and that is required for the flight phase, and a distribution step for distributing the required power between the at least one engine and the electric machine as a function of a target noise level and of the required power for the flight phase, as well as of a model for the noise generated by the at least one engine as a function of one of its parameters.
摘要:
A method and system for monitoring at least one reciprocating machine having a crankshaft and at least one cylinder, comprising providing at least one sensor for monitoring the at least one cylinder, the sensor being in communication with at least one processor configured to measure at least one signal from the at least one sensor and to thereby determine an angular position of the crankshaft; selecting at least one subset of potential crankshaft angular positions; calculating at least one statistic associated with the at least one subset of possible crankshaft angular positions based at least partially on data from the at least one sensor; and automatically providing a user with at least one warning or automatically shutting down the machine if the at least one statistic exceeds at least one predetermined threshold; wherein, the at least one sensor comprises at least one acoustic emission sensor.
摘要:
A control system for an engine of a vehicle includes an adder module that determines a temperature sum based on a sum of a plurality of temperatures determined based on (i) a plurality of operating parameters of the vehicle and (ii) a plurality of predetermined values calibrated for determining an estimated temperature at a location within an exhaust system of the vehicle. A temperature difference module determines a temperature difference based on the temperature sum and a previous value of the temperature difference. An estimating module determines the estimated temperature at the location within the exhaust system based on the temperature difference and a reference temperature. An actuator control module selectively adjusts at least one engine actuator based on the estimated temperature.