Diesel fuel injection pump with signal rotor giving reference position and rotation position signals

Patent · Tue Mar 11 04:00:00 EST 1986

OSTI ID:5899638

Ito, Y; Kobayashi, F; Miyagi, H

This patent describes a distribution type fuel injection system for an internal combustion engine having a crankshaft and cylinders. The fuel injection system consists of: an input shaft mounted for rotation in a predetermined phase relationship with the crankshaft; a housing; a plunger; a combination of a cam plate and a cam follower incorporated between the input shaft and the plunger to drive the plunger in a first axial direction to reduce the size of the high pressure chamber in a first group of certain spaced rotational phases of the input shaft. A spring biases the plunger in a second axial direction opposite to the first axial direction to increase the size of the high pressure chamber in a second group of certain spaced rotational phases. Each rotational phase of the second group is located between corresponding two adjacent ones of the first group of rotational phases; means for communicating the high pressure chamber with a source of fuel when the plunger is moving in the second axial direction and for communicating the high pressure chamber with successive ones of the plurality of cylinders when the plunger is moving in the first axial direction; a solenoid valve which selectively vents the high pressure chamber according to selective energization and deenergization thereof to control the amount of fuel supplied to respective ones of the cylinders; a signal rotor having signal generating means circumferentially spaced around a circular portion thereof; a signal pickup means for detecting each of the signal generating means as it passes a predetermined location adjacent to the circular portion of the signal rotor; an electronic calculating means for calculating an amount of fuel to be injected for each fuel injection according to engine rotational speed and accelerator pedal opening amount. The calculating means determines a rotational angle of the crankshaft.

• Assignee: Toyota Jidosha Kabushiki Kaisha
• Patent Number(s): US 4574756
• OSTI ID: 5899638
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
CYLINDERS
DIESEL ENGINES
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
MOTION
POSITIONING
PRESSURE DEPENDENCE
ROTATION
ROTORS
SHAFTS
SIGNALS
SOLENOIDS
SPACE DEPENDENCE
TIME MEASUREMENT
VALVES