摘要:
A two-phase pulse signal generator which includes a first triangular signal generator in the form of a closed loop oscillator, a second triangular signal generator for generating a signal which is inverted with respect to the first triangular signal and a couple of comparators for comparing the respective triangular wave signals with a common control signal representative of a control requirement. The two-phase pulse signals are obtained from the respective comparators and the time duration of each of the pulse signals is proportional to the contrl voltage.
摘要:
An apparatus for controlling angular position of optical axis of a head lamp assembly for a motor vehicle. An actuator is supplied selectively with the atmospheric pressure and a negative pressure available from an intake conduit of an internal combustion engine thereby to produce corresponding mechanical displacements. A detector for detecting the angular position of the optical axis of the head lamp assembly responds to the mechanical displacements of the actuator to change-over successively the contact states of a plurality of paired electric contacts. A command unit for setting the angular position of the optical axis of the head lamp assembly is provided which includes a plurality of paired electric contacts connected in one-to-one correspondence to the paired contacts of the optical axis position detector. A signal for setting the optical axis of the head lamp assembly is produced in dependence on the contact states of the optical axis position detector.
摘要:
In a fuel control system of the type in which an electromagnetic valve responsive to timing pulse voltage is employed to intermittently effect the metering of the fuel, a control voltage generator generates a control voltage corresponding to a predetermined fuel metering characteristic of the engine, and a trigger signal generator triggers a timing pulse generator at a predetermined period to generate timing pulses whose time width is controllable in accordance with the control voltage to actuate an electromagnetic valve.
摘要:
An injection pump control system comprises a plurality of pressure feed mechanisms each thereof including inner cams, pump plungers, etc., and provided in a rotor, a separate fuel inlet passage provided for each pressure feed mechanism, an electromagnetic valve provided for each fuel inlet passage to open and close the same, an electric control circuit for making the number of open-close operations of each electromagnetic valve equal to the number of operations of each pressure feed mechanism and for controlling the duration of opening of the electromagnetic valves in accordance with the operating conditions of an engine.
摘要:
In a diesel engine controlling system having a fuel injection pump, a fuel injection timing adjusting device is controlled by a drive pulse signal whose duty cycle is controlled by a microcomputer. The duty cycle is determined such that a basic duty cycle obtained by using engine rotational speed and injection quantity, is modified or corrected by way of a correction factor and a forecast correction factor. The-first mentioned correction factor comprises an integration component and a proportional component both derived from the difference between a measured fuel injection or ignition timing and a desired or reference fuel injection or ignition timing, which is calculated by using the engine rotational speed and the injection quantity. The forecast correction factor corresponds to a differential value of the basic duty cycle or the desired fuel injection or ignition timing. In order to detect the fuel injection or ignition timing a timing detector is employed, where the state of an output signal from the detector is monitored to prohibit calculation of the difference or error, thereby correcting the basic duty cycle by only the forecast correction factor when the detector is in abnormal condition.
摘要:
An optimum control method for internal combustion engines uses the values of an engine control variable, such as engine timing, which are arranged in a map and stored in a memory. During normal operation, the engine is operated in accordance with one of the mapped engine control variable values related to engine operating conditions. During a fuel consumption minimization operation, the mapped engine control variable value is changed by an incremented amount to operate the engine therewith, and the mapped engine control variable value is replaced by the changed engine control variable value, if it is detected that the change by the incremented amount is in a direction to reduce the fuel consumption rate of the engine. This optimum engine control method can compensate for changes in the characteristics of engines caused during the manufacture or caused by changes over time during their operation, thereby ensuring the operation of an engine at a minimum rate of fuel consumption.
摘要:
A function signal having a desired characteristic curve is generated through the logical operation on a vehicle speed signal indicative of the speed of a vehicle, a ratio signal indicative of the air-to-fuel of the mixture supplied to the engine mounted on the vehicle, and a pressure signal indicative of the pressure in the intake manifold of the engine. The position of an electromagnetic valve for adjusting the amount of fuel supplied to the engine is controlled in response to the function signal, thereby controlling the air-to-fuel of mixtures in accordance with the various driving conditions of the vehicle including the vehicle speed.
摘要:
A fuel control system for controlling the supply of fuel to a gas turbine engine in all the engine operating ranges including the acceleration, deceleration and part-load operations. The fuel control system comprises load control signal generating means and idling control signal generating means for detecting the operating parameters of a gas turbine engine and generating a load control signal and an idling control signal each corresponding to the proper fuel feed quantity under load conditions and idling conditions, respectively, and an upper limit selection circuit for selecting greater one of the signals from the two means and generating a fuel control signal for commanding the proper fuel feed quantity.
摘要:
Disclosed is a fuel injection quantity control system incorporated with a fuel injection pump with a solenoid-operated spill valve wherein a control signal is generated for cutting off a fuel supply to engine cylinders when a rotational phase angle of a drive shaft of the fuel injection pump is coincident with a desired spill phase angle determined in accordance with engine operating conditions. The desired spill phase angle, i.e., the opening timing of the spill valve is controlled in accordance with the rotational variations of the fuel injection pump. The desired spill phase angle is divided by unit angle corresponding to a detection period of rotational angle signals produced in accordance with the rotation of the pump drive shaft, obtaining a quotient and a remainder angle. The remainder angle is converted into a time on the basis of an engine speed. The generation of the control signal basically occurs upon the elapse of the converted time after the count of rotational angle signals is coincident with the quotient. If the engine operating condition varies immediately prior to the coincidence therebetween, the control signal is generated immediately after the coincidence or upon the elapse of a predetermined time period thereafter.
摘要:
Apparatus for providing information for an agricultural work machine comprising a distance detector which detects the distance travelled by an agricultural vehicle, a fuel consumption detector, which detects the amount of fuel consumed by the engine of the agricultural vehicle, a circuit for inputting the working width of the agricultural vehicle, an operating circuit for calculating fuel consumption rate indicative of the amount of fuel consumed per unit working area, and a display for displaying the calculated information. The fuel consumption detector may be replaced with a timer which detects the working time of the agricultural vehicle so that working efficiency may be obtained in place of the fuel consumption rate. The total area to be worked may be input in order to estimate the time of completion of the agricultural work or the fuel consumption rate at the time of completion of the work. Various function keys may be provided to selectively obtain necessary information among various kinds of information.