摘要:
In a fuel injection apparatus in which an air sensor deflected as a function of the intake air quantities maintains the air-tofuel ratio at a constant value and wherein the return force affecting the air sensor and opposing the deflecting force of the air flow is derived from pressurized liquid, the pressure of said liquid is varied by altering the energizing current of an electromagnet forming part of a pressure control valve.
摘要:
THE FUEL RACK OF A FUEL INJECTION PUMP IS REGULATED AS A FUNCTION OF THE ENGINE R.P.M., THE POSITION OF THE ARBITARILY OPERATED BUTTERFLY VALVE AND OTHER OPERATIONAL VARIABLES. FOR THIS PURPOSE AN ELECTRIC SIGNAL REPRESENTING A DESIRED VALUE IS DERIVED FROM THE ANGULAR AND AXIAL POSITIONS OF A THREE-DIMENSIONAL CAM (WHICH ASSUMES ITS POSITION IN RESPONSE TO AN ELECTRIC SIGNAL CHARACTERIZING THE ACTUAL ENGINE R.P.M. AND IN RESPONSE TO A MECHANICAL SIGNAL CHARACTERIZING THE ACTUAL POSITION OF THE BUTTERFLY VALVE) AND IS COMPARED WITH AN ELECTRIC SIGNAL REPRESENTING AN ACTUAL VALUE DERIVED FROM THE ACTUAL POSITION OF THE FUEL RACK. THE ELECTRIC SIGNAL RESULTING FROM SAID COMPARISON IS APPLIED TO A CONTROL MEMBER WHICH IS DISPLACED ACCORDINGLY AND WHICH, BY VIRTUE OF ITS CONNECTION WITH THE FUEL RACK, CAUSES A CORRESPONDING MOVEMENT OF THE LATTER. ELECTRIC CORRECTING SIGNALS REPRESENTING PHYSICAL
MAGNITUDES, SUCH AS ENGINE TEMPERATURE AND ATMOSPHERIC PRESSURE, VARY THE DESIRED AND/OR ACTUAL VALUE SIGNALS PRIOR TO THEIR COMPARISON.
摘要:
In a fuel injection apparatus which delivers metered fuel to fuel injection valves, there is provided, downstream of each differential pressure valve which ensures a constant pressure drop across each fuel metering valve and upstream of the associated fuel injection valve, a chopper valve which, in the low rpm range effects an intermittent fuel injection into the intake tube of the internal combustion engine to prevent uncombusted gas mixture from entering the exhaust system in said rpm range.
摘要:
In a fuel injection apparatus in which an air sensor deflected as a function of the intake air quantities maintains the air-tofuel ratio at a constant value and wherein the return force affecting the air sensor and opposing the deflecting force of the air flow is derived from pressurized liquid, the pressure of said liquid is varied by altering, in response to the oxygen content of the exhaust gas, the energizing current of a solenoid forming part of a pressure control valve.
摘要:
The supply of fuel to an internal combustion engine is controlled by a sensor plate mounted in the suction duct and which deflects in response to air intake rate into a conically flared duct portion. The plate is mounted on a pivoted arm, on which is pivotably mounted a rocker engaging the slider of a fuel measuring distributor valve. Pivotal movement of the arm causes a roller to sense a cam surface and adjust the rocker. The cam surface is movable in response to an engine operating condition to provide different relationships.
摘要:
In a fuel injection apparatus, in order to maintain a constant fuel-air ratio, the position of the movable valve member of a fuel quantity distributor and metering valve is affected by an electromagnet. The intensity of the energizing current for the electromagnet is derived from a comparison between the output of a first and a second bridge circuit. The first bridge circuit contains a temperature-dependent resistance which is located in the engine suction pipe and the resistance value of which is a measure for the flow rate of air. The second bridge circuit contains a temperature-dependent resistance which is located in the distributor and metering valve and the resistance value of which is a measure for the flow rate of fuel.
摘要:
In a fuel injection apparatus the air-fuel ratio is controlled by an air sensor which is deflected against a return force by the intake air and which, as a function of the extent of its deflection, controls the output of a fuel metering valve. To ensure a leaner fuel mixture subsequent to a cold engine start, there is provided a first temperature-dependent control element which is responsive to the water coolant temperature and, upon the increase of the latter, causes an increase in the bias of a spring augmenting, in turn, said return force to bring about a leaner fuel mixture and a second temperature-dependent control element which is responsive to a separate heater means and which, for a very short period subsequent to the starting of the cold engine, hinders said first temperature-dependent control element to increase said bias.
摘要:
In a fuel injection apparatus - in which the air-fuel ratio is maintained constant by an air sensor displaceable in the suction tube by the intake air drawn into the internal combustion engine with which the fuel injection apparatus is associated - in order to prevent undesired shifts in the metered fuel quantities in the low rpm range, the pressurized liquid used as a return force for the air sensor passes through a throttle assembly which throttles the liquid flow to an extent dependent upon the direction of flow therethrough.
摘要:
THE POSITION OF A POSITIONING MEMBER WHICH CONTROLS THE AMOUNT OF FUEL TO BE INJECTED INTO AN INTERNAL COMBUSTION ENGINE IS DETERMINED BY DRIVING A SIGNAL REPRESENTATIVE OF ENGINE SPEED, MODIFYING THE SIGNAL TO OBTAIN AN OUTPUT REFLECTING ENGINE CHARACTERISTICS, AND THEN CONTROLLING WITH THE MODIFIED SIGNAL THE POSITION OF A CAM, PREFERABLY A THREE-DIMENSIONAL CAM, THE POSITION OF THE CAM BEING ADDITIONALLY CONTROLLED BY THE POSITION OF THE ACCELERATOR FOR THE ENGINE. A SIGNAL IS DERIVED FROM A CAM FOLLOWER, AND THIS SIGNAL IS ADDITIONALLY AFFECTED BY A CORRECTION UNIT CORRECTING FOR CHANGES IN AMBIENT AIR PRESSURE, TEMPERATURE OF THE ENGINE, OR AMBIENT CONDITIONS, OR THE LIKE, SO THAT THE FINAL OUTPUT CONTROLLING THE SETTING OF THE POSITIONED MEMBER WHICH DETERMINES THE AMOUNT OF FUEL INJECTED WILL BE REPRESENTATIVE OF ENGINE CHARACTERISTICS, THE ACCELERATOR POSITION, AND AMBIENT CONDITIONS AS SENSED BY THE CORRECTION UNIT.
摘要:
In a fuel injection system, in order to prevent an intake air sensor to transmit those forces to a fuel control valve which are generated upon sudden thrusts of air in the engine intake tube, there is provided a valved passage which connects intake tube portions upstream and downstream of the intake air sensor and which opens in response to a predetermined pressure differential prevailing across the intake air sensor.