Apparatus for electrically synchronizing fuel injection with fuel ignition in an internal combustion engine

Abstract

Abstract IN AN INTERNAL COMBUSTION ENGINE HAVING A PLURALITY OF CYLINDERS ARRANGED IN FIRST AND SECOND BANKS, AN ELECTRONIC FUEL INJECTION SYSTEM INCLUDES A TIMING APPARATUS FOR SYNCHRONIZING THE INJECTION ORDER OF THE CYLINDERS WITH THE IGNITION ORDER OF THE CYLINDERS. THE TIMING APPARATUS COMPRISES A TIMING TRANSDUCER AND A TIMING CIRCUIT. THE TIMING TRANSDUCER INCLUDES A PAIR OF ROTATABLE PERMANENT MAGNETS OPPOSITELY POLED WITH RESPECT TO A STATIONARY WINDING FOR PRODUCING ALTERNATE FIRST AND SECOND TIMING PULSE PAIRS IN SYNCHRONIZATION WITH THE OPERATING CYCLES OF THE ENGINE. THE FIRST AND SECOND TIMING PULSE PAIRS EXHIBIT OPPOSITE POLARITY TRANSITIONS EFFECTIVELY DIVIDING EACH ENGINE OPERATING CYCLE INTO FIRST AND SECOND OPERATING STAGES. THE TIMING CIRCUIT INCLUDES A BISTABLE MULTIVIBRATOR FOR PRODUCING A TIMING SIGNAL WHICH ALTERNATELY SHIFTS BETWEEN FIRST AND SECOND LEVELS IN RESPONSE TO THE OPPOSITE POLARITY TRANSITIONS IN THE FIRST AND SECOND TIMING PULSE PAIRS. IN A CONVENTIONAL MANNER, A FUEL IGNITION SYSTEM SEQUENTIALLY FIRES THE FIRST BANK OF CYLINDERS DURING THE FIRST OPERATING STAGE AND SEQUENTIALLY FIRES THE SECOND BANK OF CYLINDERS DURING THE SECOND OPERATING STAGE. IN A COMPLEMENTARY MANNER, THE FUEL INJECTION SYSTEM IS RESONSIVE TO THE FIRST AND SECOND LEVELS OF THE TIMING SIGNAL TO SIMULTANEOUSLY CHARGE THE FIRST BANK OF CYLINDERS DURING THE FIRST OPERATING STAGE AND TO SIMULTANEOUSLY CHARGE THE SECOND BANK OF CYLINDERS DURING THE SECOND OPERATING STAGE. THUS, THE INJECTION ORDER OF THE CYLINDERS IS TIME DIVISION SYNCHRONIZED WITH THE IGNITION ORDER OF THE CYLINDERS.

Inventors

• 👤 Gerald O Huntzinger
• 👤 Donald O Ruff

Bibliographic Details