摘要:
In a flow quantity control valve of the type comprising a rod shaped valve moved toward and away from an orifice formed in a fluid passage for controlling flow quantity of an operating fluid supplied to a power steering device of a motor car, for example, and drive means for reciprocating the rod shaped valve with respect to the orifice, there is provided an annular permanent magnet loosely encircling the rod shaped valve and located close to the orifice for attracting and removing magnetic particles contained in the operating fluid where the drive means is constituted by a solenoid coil and a plunger, current supplied to the solenoid coil is adjusted in proportion to a running speed of a motor car.
摘要:
A control device for a power steering apparatus for controlling a torque applied to the power steering apparatus in accordance with a travel condition.A travel condition determining unit generates a travel condition signal in accordance with an average steering angle value and an average velocity value. A load determining unit generates a load signal in accordance with a sensed load condition. A correction signal generating unit generates a correction signal in accordance with the travel condition signal and the load signal. A memory stores a single reference control characteristic for the power steering apparatus. A correcting unit corrects the reference control characteristics in accordance with the correction signal to provide optimal power steering control.
摘要:
A drive circuit for a solenoid pump comprises a series combination of a pump solenoid and a capacitor connected through a rectifier circuit with an a.c. source. The solenoid is shunted by another rectifier poled to pass a charging current to the capacitor. A thyristor is connected across the series combination, and is triggered into conduction, whereupon it short-circuits the series combination to permit a discharge of the capacitor through the solenoid and to prevent a current flow from the source to the capacitor, thus allowing a uniform control of the energy discharged by the capacitor. A trigger circuit for the thyristor comprises a relaxation oscillator including a programmable unijunction transistor, the conduction of which is controlled inversely to fluctuations in the source voltage.
摘要:
An electronic controller of the invention judges whether the pedaling speed exceeds a threshold and a pedal pressure exceeds a threshold based on detected signals from a stroke sensor and a pressure sensor. When the electronic controller judges that the pedaling speed exceeds the threshold and the pedal pressure exceeds the threshold, comparators output signals to actuate a switch. Thus, a braking force for emergency braking is outputted.
摘要:
Power steering control apparatus utilizing on oil pump comprises a car speed sensor producing a car speed signal, a steering sensor producing a steering signal, a mean car speed calculating circuit, a mean steering quantity calculating circuit, a mean lateral acceleration calculating circuit calculating a mean lateral acceleration based on the mean car speed and the mean steering quantity, a car speed calculating circuit, pattern memory means storing a plurality of number of revolutions characteristics of the oil pump corresponding to different patterns, a selector selecting one of the number of revolutions characteristics in accordance with the mean lateral acceleration and the mean car speed, circuit means for deriving out a number of revolutions signal of the oil pump corresponding to the car speed, and control means controlling rotation of the oil pump in accordance with the derived out number of revolutions signal of the oil pump.
摘要:
In a method of controlling an electric power steering apparatus by controlling a drive force of a steering force assisting electric motor when a vehicle speed is lower than a predetermined speed and controlling a braking force of the electric motor when the vehicle speed exceeds the predetermined speed, a steering wheel forward or reverse turning state is determined in accordance with a change in steering torque when the vehicle speed exceeds the predetermined state. The braking force of the electric motor is controlled only when the steering wheel reverse turning state is detected.
摘要:
A load current control device operates so as to control the magnitude of a current delivered to a load by varying a duty factor. With this control device, a fundamental value is determined on the basis of an instruction of an input signal, and a reference duty factor and a reference current value are determined on the basis of the fundamental value. The control device further operates to correct the reference duty factor on the basis of a difference between the magnitude of a current actually flowing in the load and the reference current value to turn on and off a power supplied in accordance with the corrected duty factor, therby to control the magnitude of the load current. In addition, when the above-said difference is out of a predetermined range, this load current control device outputs a signal indicative of abnormal condition.
摘要:
In an electro-mechanical converter of the type wherein a plunger contained in a cylinder is moved in the axial direction thereof by passing a control signal through a solenoid coil wound about the cylinder, the diameter of the plunger is made sufficiently smaller than the inner diameter of the cylinder such that the plunger can move without causing undue friction. The plunger is supported by ball bearings to be movable with respect to the cylinder. To control a power steering unit of a motor car a control valve is actuated by the plunger for controlling the amount or pressure of the operating oil supplied to the power steering unit, in which case the control signal is made to be proportional to the speed of the motor car.
摘要:
A method and device for controlling a power steering device wherein a flow control valve unit is arranged between an oil pump and a power steering unit, the flow control valve unit being controlled to supply oil to the power steering unit at a flow rate corresponding to a vehicle speed, has the steps of determining whether or not the flow rate of oil supplied to the power steering unit corresponds to a value required in accordance with current steering conditions, and increasing the flow rate to a value so as to correspond to the steering conditions when the flow rate does not correspond to the current steering conditions.
摘要:
A power steering apparatus wherein an oil pump for actuating the power steering apparatus is controlled by a control device in accordance with an output of a sensor device detecting the running state of a motor car. The control device drives said pump when said sensor device detects that the car speed is lower than a predetermined value but stops said pump when said sensor device detects that said car is standstill while the steering wheel of the motor car is not operated.