Apparatus for adjustably controlling valve movement and fuel injection

Patent · Tue Aug 24 04:00:00 EDT 1993

OSTI ID:6241635

Miller, C R; Shyu, T P; Weber, J R

Apparatus is described for adjustably controlling valve movement and fuel injection of an engine having at least one fuel injection system, one exhaust valve system, one intake valve system, a microprocessor controller for receiving input signals and delivering engine controlling electrical signals, and a liquid pressure system, comprising: a single piezoelectric motor connectable to the microprocessor controller and the liquid pressure system and being adapted to receive engine controlling electrical signals from the microprocessor and controllably delivering pressurized liquid signals to the liquid pressure system in response to the received signal; and a spool valve having a single spool, the valve having a plurality of inlets and outlets and being connectable to the liquid pressure system for receiving pressurized liquid signals therefrom and controllably moving the single spool of the spool valve and delivering valve and injection controlling signals to the valve systems and injector system and controlling both valve movement and fuel injection responsive to engine controlling electrical signals received by the piezoelectric motor.

• Assignee: Caterpillar Inc., Peoria, IL (United States)
• Patent Number(s): US 5237968; A
• Application Number: PPN: US 7-971103
• OSTI ID: 6241635
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRIC MOTORS
ELECTRICITY
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOTORS
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
PIEZOELECTRICITY
VALVES