Abstract: A method and a device for controlling fuel injection in multi-cylinder internal combustion engines, includes means for computing a time shift of a common time point for ignition start in respective cylinders to a new value at which pressure differentials in respective intake pipes are approximately equal and consequently .lambda.-dispersion is minimized.

Abstract: Method and apparatus for determining an injection moment during a start process of the internal combustion engine, in which the time point of controlling of the injection valve is shifted for a period of time depending upon the number of revolutions of the crank shaft so that the electromagnetically actuated injection valve is controlled when the battery voltage reaches the maximum value.

Abstract: A control device for a supercharged internal combustion engine is proposed, in which a device for fuel limitation during overrunning is also used for limiting the fuel metering in a definite manner in the event that a threshold value of the charge pressure is exceeded. To this end, a switch actuated by the charge pressure is connected parallel to a switch triggered during overrunning. In the event that the threshold value of the charge pressure is exceeded, overrunning is simulated accordingly, and the associated provisions for fuel limitation for such an event are initiated.

Abstract: A fuel metering system and method for an internal combustion engine is proposed, having a lambda regulation device and a warm-up enrichment, in which at the onset of regulation the warm-up enrichment is reduced or turned off for the purpose of not having an abnormally high control stroke when transferring to a closed-loop operation and thereby rapidly attaining a stable lambda value.

Abstract: An electronically controlled or regulated fuel metering system for an internal combustion engine having one sensor each for the air flow in the intake tube and for the throttle valve position is proposed. In accordance with the signals of these sensors, influence can be exerted upon at least one of the operating states of lambda regulation, full load and fuel quantity limitation. The fundamental concept is that not only the air flow rate signal or only the signal relating to an opened throttle valve should be evaluated as a full-load signal but that the full-load state is presumed to exist when, with the throttle valve opened, the air throughput in the intake tube simultaneously exceeds a predetermined value as well. The same condition applies to full-load enrichment. The overall result is cleaner exhaust gas.

Abstract: The maximum speed in an internal combustion engine is limited by circuitry which can be adjusted to conditions requiring a lower-than-normal top speed, for example during initial delivery to the customer and during the break-in period of the engine. The top speed limiter includes a comparator for suppressing or altering the fuel injection pulses. As a feature of the invention, the reference signal applied to the comparator and representing the top engine speed can be changed either manually or on the basis of elapsed time or mileage.

Abstract: In order to prevent undesirable abrupt changes in engine torque when the fuel supply to the engine is shut off at the onset of engine braking, the invention provides the gradual decrease of the amount of fuel supplied to the engine beginning with the onset of engine braking and continuing until fuel has decreased to approximately 80 percent of the normal amount at which time the fuel is shut off entirely. When engine braking stops or when the operator indicates a demand for acceleration, the fuel supply is initiated at the level of approximately 80 percent of normal and is increased thereafter up to the normal amount according to a second selectable function of time.

Abstract: A fuel injection installation for internal combustion engines having a plurality of injection valves for supplying fuel to the engine. Each injection valve is sealed to fuel distributing line and to either the intake manifold of the engine, or to the cylinder head of the engine, by at least one O-ring, each O-ring being braced only in the radial direction. Each injection valve is fixed in an axial direction on the fuel distributing line by means of a fastening plate yielding in the radial direction and embodied as bracket-like, which is insertable through appropriately shaped recesses in each insertion nipple on the fuel distributing line and can be snapped into an annular groove of each injection valve. As a result, there is assured not only a secure connection between the fuel distributing line and the injection valves which compensates for axial clearances required for manufacture, but also rapid mounting or dismounting of the fuel injection installation.

Abstract: A fuel injection system is proposed for internal combustion engines having a plurality of injection valves for supplying fuel to the engine. Each injection valve is connected by a yieldable support bracket with a rigid fuel distributor line. The bracket is mounted pivotally with an annular coller secured to the injection valve. The fuel distributor line is arranged to engage rib-like carrier members connected with the internal combustion engine and is held against the carrier member by yielding clamp elements. After the valves are engaged in the sockets of the fuel distributor line and the bore of the cylinder head, then the support brackets are swung upwardly to tension the seal elements that are disposed in proximity to the opposite ends of the valve. As a result, not only a more secure connection between the fuel distributor line and the injection valves is obtained, but also rapid assembly or disassembly of the fuel injection system.

Abstract: A fuel mixture control apparatus for an electronic fuel injection system for internal combustion engines. In a warm-up controller, the fuel injection control pulses are lengthened for enrichment of the fuel-air mixture during engine warm-up on the basis of signals supplied by a temperature transducer. In order to make the warm-up enrichment dependent on prevailing engine states, for example on the conditions of idling and partial or full load, circuitry is provided to sense these conditions and to suitably alter the enrichment factor. A further circuit suppresses the dependence or enrichment on engine status during engine starting. Various embodiments are presented.

Abstract: A fuel injection system which employs electromagnetic injection valves controlled by injection control pulses of variable width. When the engine is being operated in the overrunning condition, with closed throttle and elevated rpm, the normally provided fuel injection control pulses can be supplanted by substitute pulses of either constant or variable width. The apparatus includes a comparator circuit which determines whether the original control pulse is to be used or the substitute pulse. Several embodiments are presented.