摘要:
A digital control system for an internal combustion engine uses a two stage register. The register is used to store digital data representative of sensed engine operating conditions and to feed such data to a programmable digital computer for processing. Processing time is improved by reading only one register containing the most significant data bits of the stored data for engine parameters having a relatively narrow dynamic range and reading both registers, containing all data bits of the stored data for engine parameters having a relatively large dynamic range.
摘要:
In an engine speed sensing device, angle pulses produced when the crankshaft rotates through a predetermined angle are counted by a counter for a predetermined interval. The count of angle pulses is read into a central processing unit of a digital computer at the end of each set time interval in response to a control signal which both updates the angle pulse count and signals the processing unit to read the count.
摘要:
An electronic engine control system has a pressure sensor communicating both to the intake manifold and the ambient air via a valve means selectively introducing either the intake vacuum or the ambient air into the pressure sensor. The control system further includes a valve control means for controlling the operation of the valve means for selectively communicating the pressure sensor to the intake manifold and the ambient air. The valve control means is incorporated in a controller for determining the control value and adapted to produce a control signal to be supplied to the valve means in order to electrically control the valve motion.
摘要:
A method of controlling a power train including an engine and a transmission wherein various input data are generated and among the various input data, a predetermined input data is common in controlling the engine and the transmission.
摘要:
A fuel injection control system is disclosed which generates a fuel-injection command pulse signal having a constant repetition rate and a pulse width calculated from an algebraic relationship defining fuel-injection pulse-width as a function of engine air flow. The system can eliminate the need for engine-speed calculations and increase system reliability.
摘要:
A fuel injection control system for a direct injection type internal combustion engine having a plurality of fuel injection valves installed in respective combustion chambers. The fuel injection control system comprises: (a) a means for calculating start timing with respect to each engine stroke and duration of fuel injection through the respective fuel injection valves according to the engine operating condition; (b) a means for producing a plurality of pulse signals each having a period corresponding to an angle of a crankshaft rotation including at least two engine strokes; and (c) a injection signal means provided for each engine cylinder for producing a fuel injection signal which rises at the time of the calculated start timing and has a duration corresponding to the calculated duration of fuel injection, the fuel injection signal being sent to the corresponding fuel injection valve at any time during the extended time interval from at least the beginning of the suction stroke to the end of the compression stroke of the engine cylinder.
摘要:
A fuel injection control device includes a microcomputer which determines a fuel injection amount based on the engine operation parameters. The microcomputer also actuates the fuel injection valve to open earlier in relation to the normal timing of fuel injection in response to turning on the starter switch. The fuel injection amount corresponds to the duration of opening of the fuel injection valve, and the opening duration of the fuel injection valve is defined by a driving signal and a stopping signal. The driving signal is generated at given angles of crank revolution. The driving signal is generated in response to a preset number of crank angle pulses, which is varied between the first fuel injecting operation and subsequent fuel injecting operations. The fuel injection timing of the first injecting operation is shorter than that of the remainder for improving start-up characteristics of the engine responsive to turning on the starter switch.
摘要:
A system to control operation of an IC engine, comprising, as a principal subsystem, a digital control system for executing computing processing by using inputs representative of parameters of engine operating conditions, including an engine speed signal, thereby producing a control signal to control at least one actuator which can regulate a factor of engine operation. The digital control system comprises means for examining the length of pulse intervals of the engine speed signal and discriminating means for forming a judgement that the engine is stalling when the pulse intervals continue to be longer than a predetermined length of time for a predetermined period of time, so that the system does not misjudge the presence of a noise signal to be an indication of engine stall.
摘要:
An actively controlled suspension system comprises a hydraulic cylinder disposed between a vehicle body and a suspension member rotatably supporting a vehicular wheel, the hydraulic cylinder defining therein a working chamber, a pressure source including a pump associated with an automotive internal combustion engine to be driven by the output of the engine, a pressure control valve having a first port connected to the working chamber, a second port connected to the pressure source via a supply line and a third port connected to the pressure source via a drain line, the pressure control valve being variable of valve position for selectively establishing and blocking fluid communication between the first port and the second port and between the first port and the third port for adjusting fluid pressure in the working chamber for controlling suspension characteristics, a vertical acceleration sensor for monitoring vertical acceleration exerted on the vehicular body to produce a vertical acceleration indicative signal, first circuit for arithmetically deriving a vertical stroke speed of the vehicular body on the basis of the vertical acceleration indicative signal, second circuit for detecting initiation of arithmetic operation of the first circuit for setting data for use in derivation of the vertical speed in a value for cancelling offset contained in the vertical acceleration indicative signal.
摘要:
A fuel injection control system performs fuel cut-off operation intermittently so that engine output torque may not fluctuate at significant level to cause jerking at the transition from fuel injecting state to fuel to fuel cut-off state and at fuel resumption after fuel cut-off. Intermittnetly cutting off the fuel delivery for the engine cylinders, engine output torque drop at the fuel injecting state and fuel cut-off state can be reduced for reducing magnitude of jerking.