Hydraulic assist turbocharger system and method of operation

Patent · Tue Nov 18 04:00:00 EST 1986

OSTI ID:7123673

Kobayashi, R J

This patent describes a hydraulic assist turbocharger system for supplying charge air to a combustion engine, comprising: an hydraulic assist turbocharger having a first turbine driven by engine exhaust gases, a compressor rotatably driven by the first turbine for supplying charge air to the engine, and an hydraulic turbine for selective supplemental driving of the compressor; hydraulic fluid supply means for selectively supplying an hydraulic fluid under pressure into rotatable driving communicating with the hydraulic turbine, the fluid supply means including at least two nozzles for passage of the fluid under pressure into driving communication with the hydraulic turbine; means for selectively preventing passage of the fluid under pressure through at least one of the nozzles and for permitting passage of the fluid under pressure through at least one other of the nozzles during an engine starting procedure. This is to decrease the available nozzle flow area open to fluid passage and thereby increase the pressure of hydraulic fluid during the engine starting procedure to correspondingly increase supplemental driving of the compressor resulting in increased supply of charge air to the engine; and means for selectively decreasing the viscosity of the hydraulic fluid during a starting procedure of increase the flow rate of the hydraulic fluid into driving communication with the hydraulic turbine during the starting procedure to correspondingly increase supplemental driving of the compressor resulting in increased supply of charge air to the engine. The hydraulic fluid supply means comprises pump means for providing the hydraulic fluid under pressure for flow through the nozzles into driving communication with the hydraulic turbine.

• Assignee: Garrett Corp., Los Angeles, CA
• Patent Number(s): US 4622817
• OSTI ID: 7123673
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
COMPRESSORS
CONTROL
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
HYDRAULIC CONTROL DEVICES
HYDRAULIC EQUIPMENT
HYDRAULIC FLUIDS
HYDRAULIC TURBINES
INTERNAL COMBUSTION ENGINES
MACHINERY
NOZZLES
OPERATION
PRESSURE CONTROL
PRESSURIZING
SUPERCHARGERS
TURBINES
TURBOCHARGERS
TURBOMACHINERY
VELOCITY
VISCOSITY
WASTES
WORKING FLUIDS