摘要:
A vehicle control apparatus is provided with a plurality of unit controllers to individually provide control to different control items constructed such that mutual communication of data for diagnosis is effected between the unit controllers, and when one of the unit controllers comes to be abnormal, the other or others change their control mode so as to lead the vehicle to safety, based on the data from the one unit controller having come to be abnormal.
摘要:
An apparatus for controlling the operation of an internal combustion engine having a carburetor which, controls the air-fuel ratio of the air-fuel mixture supplied to the engine in the steady operating condition of the engine on the basis of predetermined data determined relative to the engine crankshaft rotation speed and intake vacuum and stored in a memory. A three-way catalyst purifies engine exhaust gases, and an output signal from an O.sub.2 sensor in the exhaust system is fed back for the control of the air-fuel ratio in the engine exhaust gases. A circuit checks whether this feedback control is normally carried or not. The air-fuel ratio supplied to the engine in an unsteady operating condition of the engine is controlled by regulating the fuel and air supplied to the engine while bypassing the carburetor, by the sensed values of the intake vacuum, engine crankshaft rotation speed and engine temperature and also depending on the throttle valve position. To control the rate of exhaust gas recirculation, an upper limit and a lower limit of the rate of opening of a recirculation rate regulating valve are determined on the basis of the sensed throttle valve opening, and other predetermined data determined relative to the engine crankshaft rotation speed and intake vaccum is read out from the memory to limit the rate of opening of the recirculation rate regulating valve.
摘要:
An apparatus for controlling the operation of an internal combustion engine having a carburetor, especially, the air-fuel ratio and the rate of exhaust gas recirculation, controls the air-fuel ratio of the air-fuel mixture supplied to the engine in the steady operating condition of the engine on the basis of predetermined data determined relative to the engine crankshaft rotation speed and intake vacuum and stored previously in a memory. A three-way catalyst is used to purify engine exhaust gases, and an output signal from an O.sub.2 sensor in the exhaust system is fed back for the control of the air-fuel ratio in the engine exhaust gases. A circuit is provided to check whether this feedback control is normally carried or not. The air-fuel ratio of the air-fuel mixture supplied to the engine in an unsteady operating condition of the engine is controlled by regulating the amounts of fuel and air supplied to the engine while bypassing the carburetor, on the basis of the sensed values of the intake vacuum, engine crankshaft rotation speed and engine temperature and also depending on the throttle valve position. For the control of the rate of exhaust gas recirculation, an upper limit and a lower limit of the rate of opening of a recirculation rate regulating valve are determined on the basis of the sensed throttle valve opening, and other predetermined data determined relative to the engine crankshaft rotation speed and intake vacuum is read out from the memory to limit the rate of opening of the recirculation rate regulating valve.
摘要:
An engine control apparatus comprises a plurality of sensors for detecting the operation state of an engine, means for calculating, on the basis of signals produced from the sensors, a correction amount which corrects a predetermined controllable quantity, means for calculating a learned correction amount by averaging values of the correction amount by a reference occurrence frequency, means for calculating, under a predetermined condition, the learned correction amount by averaging values of the correction amount by an occurrence frequency which is smaller than the reference occurrence frequency, and means for correcting the controllable quantity in accordance with the correction amount and the learned correction amount.
摘要:
In a fuel control method data used to control the amount of the fuel supply in the previous cycle is corrected in response to the output of an O.sub.2 sensor in a current cycle, and added to or subtracted from the corrected data value as the difference between a value derived from data stored in a map based on the output of a vacuum sensor and engine rotation speed in the previous cycle and a value derived from the data stored in the map based on the output of the vacuum sensor and engine rotation speed in the current cycle. The sum or difference is used as current control data.
摘要:
Disclosed is an input data taking-in method in a motorcar controlling system, which method comprises the steps of providing, in memory means, first areas for selectively correspondingly storing request signals for requesting taking-in of the respective outputs of sensors and second areas for selectively correspondingly storing the taken-in sensor outputs; searching the request signal at the first areas; causing a multiplexer and an A/D converter to operate on the basis of the result of the searching; and setting the output of the A/D converter in the second areas of the memory means in response to a signal indicating the completion of operation of the A/D converter.
摘要:
The present specification discloses a control system for an automobile. An automobile control system according to the present invention is provided in an automobile and includes control devices for controlling the automobile in accordance with data on a control characteristic, and a rewritable storage device for storing a plurality of pieces of data on the control characteristics of the control devices and different drivers in corresponding relationship. In response to an input from any particular driver, data on control characteristic corresponding to the particular driver is read from the storage when the particular driver who has input data is the one stored in the storage, and the data is delivered to the control devices. The data on the control characteristic in the storage which the particular driver specifics can be corrected arbitrarily in accordance with a correcting input.
摘要:
An air-fuel ratio control apparatus for an internal combustion engine comprises a carburetor for controlling the air-fuel ratio of the fuel-air mixture supplied to the engine, a thermal reactor in which the exhaust gas from engine is caused to undergo reaction with secondary air supplied to the reactor, an oxygen sensor disposed in an exhaust gas passage between the reactor and three-way catalyst, a negative pressure generator for producing a negative pressure corresponding to the output from the oxygen sensor, a detector for detecting a low and a high speed operation region of the engine, and means for controlling a low speed fuel system and a main fuel system, respectively, of the carburetor in response to the negative pressure in such a manner that the fuel-air mixture is enriched with the secondary air supply being concurrently increased in the low speed operation region of the engine, while in the high speed operation range the fuel-air mixture having an approximately stoichiometric air-fuel ratio is supplied to the engine. A method of controlling the air-fuel ratio controlling apparatus is also disclosed.
摘要:
A signal corresponding to the oxygen concentration in exhaust gas as detected by an O.sub.2 sensor is applied to a control logic circuit after analog conversion. The duty ratio of a pulse signal for keeping the optimum air-fuel ratio corresponding to a running state of an automobile is calculated by the use of the detection signal and in accordance with a program stored in a ROM in advance. The control pulse having the duty ratio is used for the switching control of a solenoid valve for regulating the air-fuel ratio of a mixture.
摘要:
A control apparatus for an automobile is provided with a system manager, which initiates and manages the operation of units for controlling and operating various devices and accessories installed in the automobile. The system manager is coupled with a card unit, in which a card is inserted. Such a card has an identification code ID of a user and a code indicating that the card is registered in advance. The system manager has a list of codes of cards registered. If a card inserted is confirmed to be correct and valid by the ID and the registration code, the system manager executes a predetermined processing operation and produces a set-up instruction signal. Upon receipt of this set-up instruction signal, operations of the control units for the devices and accessories are initiated.