摘要:
To reduce waste and scrap of automotive electronic computer-type control apparatus constructed in hybrid technology on a substrate, due to malfunction, incorrect programming or desired change in data stored in the memory chip of a read-only memory (ROM) also applied in hybrid technology to the substrate, the substrate has a socket for a standard plug-insertable ROM or programmable ROM hard-wired connected thereto, the memory chip being enabled by application of a voltage applied to a circuit having a severable bridge (12) so that, upon severance of the bridge, the logic voltage applied to the chip will be of the "disable" value, permitting insertion of a standard ROM or PROM (16) into the additional socket (9) for supply of replacement data, the additional socket being hard-wired to a terminal (15) having an "enable" reference potential thereon. Preferably, isolating or decoupling resistors (3) are included in the address lines between the microprocessor (1) and the memory chip (5) to decouple the memory chip address input from the address inputs (8) of the additional socket and hence the additional memory (16 ).
摘要:
A method of and arrangement for supplying a maximum quantity of fuel which is supplied to a combustion engine in certain operational conditions independent of rate of airflow and rotational speed is provided with an altitude-correcting signal which depends the maximum amount of fuel to be supplied on the air density of the actual operational altitude of the combustion engine. Through the provision of such an altitude-correction signal, a too rich mixture of fuel and air is prevented.
摘要:
A method and an apparatus for overrunning control in an internal combustion engine are proposed, which operate with an overrunning cutoff and the reestablishment rpm of which is dependent on rpm and on time. At the onset of overrunning, a higher reestablishment rpm is selected, and once the rpm falls below a predetermined rpm value the reestablishment rpm is reduced according to a time function to a lower threshold value. The method may be realized by a controlled system, as well as by a control apparatus operating with analog circuitry.
摘要:
A circuit and method for the input of a start signal, a controller being transferred from a first state into a second state as a function of the start signal, the energy consumption of the controller in the second state being greater than in the first state, the circuit having a clocked energy source which emits a timed energy signal, and the start signal is formed as a function of the energy signal.
摘要:
The invention is directed to a system for setting the throttle flap angle for an internal combustion engine. The system sets the idle stop for the idle throttle flap angle and monitors the setting with respect to defects that occur. If the throttle flap is in contact engagement with the idle stop, a contact is actuated which causes a buffer storage of the actual throttle flap angle which thereby represents the position of the idle stop. If then, for example, the idle stop changes during driving operation, its new position is established upon a renewed contact engagement of the throttle flap, by measuring the throttle flap angle. A possible defect can be established from a comparison of actual and desired values and a positioning motor is then appropriately driven to displace the idle stop. This system has the advantage that a defect occurring in the region of the positioning motor is detected without additional circuit complexity.
摘要:
A regulating device is described for regulating or adjusting the composition of the operating mixture of an internal combustion engine. When the engine or exhaust gas probe is still cold, the composition of the fuel-air mixture is controlled in an open-loop manner, and upon the attainment of a minimum operating temperature, the closed-loop regulating device for influencing the fuel-air mixture is activated. The activation of the regulating device is effected, when the engine is being operated under a load, after the attainment of a first, low temperature value; during engine idling, this is effected after the attainment of a second, higher temperature value. Via the throttle valve, a switchover is effected between two threshold values of a threshold switch.
摘要:
The cyclic control pulses for actuating the fuel injection valves of an internal combustion engine are extended during engine starting at low temperatures. The degree of pulse extension, i.e. of fuel enrichment, is made dependent on engine temperature and decreases as a function of cranking time. In addition, a repeated starting attempt will be accompanied by reduced pulse extension to prevent excessive enrichment of the mixture. The pulse extension may also be retained for a period of time after engine cranking to insure smooth running.
摘要:
A method for producing a plastic-coated stamped grid, and a grid producer thereby on which components are disposed and which is embedded in a plastic housing in an injection mold, with the stamped grid being fixed at a fixation point with a fixation element, so that the shape of the stamped grid is preserved during the injection molding operation. As the fixation element, a plastic element is used, which is enclosed by the injected plastic, so that it seals off the fixation point. The housing is produced with a first and a second component, and the stamped grid is enclosed completely by the second component, but terminals for mechanically and/or electrically connecting the stamped grid are not enclosed. The first component opens out to a first outer side and to a second outer side of the housing.
摘要:
A method and a device for testing control units are presented, serving the purpose of operation and quality testing of automotive control units. The method comprises event control of individual test steps with defined signals from and to the test unit, thus reducing the test time. The method, furthermore, encompasses a test with square wave signals applied to the control unit, which are recognized by the control unit and read out to the test unit, thus increasing the depth of the test.
摘要:
The invention is directed to an arrangement for controlling a fuel metering apparatus controlled by a microprocessor and supplemented with an emergency control system. In the event of a microprocessor failure due to a defect, the system attempts to restart the microprocessor. At the same time, an emergency operation pulse generator assumes control of the fuel metering apparatus. Such an emergency control system is particularly suited for fuel metering apparatus which serve to control internal combustion engines for motor vehicles.