The Garrett Corporation

Alliedsignal Inc.

Robert J Kobayashi

James H Nancarrow

Joe L Byrne

Jeffrey L Alger

An improved hydraulic assist turbocharger system is provided for supplying charge air to a combustion engine. The system includes at least one turbocharger having an hydraulic assist turbine adapted to be driven by a pressurized hydraulic fluid to supplementally drive the turbocharger during selected engine operating conditions when supplemental charge air flow is required. Hydraulic fluid flow is regulated by an electrohydraulic control valve responsive to control signals from a main controller, wherein the control signals and corresponding control valve operation may be independent of engine speed and load. In addition, the hydraulic fluid is supplied to the hydraulic assist turbine via a dual segment nozzle, with appropriate selector valves coupling the fluid for passage through one or both nozzle segments in accordance with engine charge air requirements. The entire system, inclusive of the turbocharger and related control components, is conveniently provided as a unitary package adapted for facilitated mounting onto a combustion engine.

Hydraulic assist turbocharger system

An improved hydraulic assist turbocharger system is provided of the type having an hydraulic turbine for supplementally driving a turbocharger during selected engine operating conditions when supplemental air flow to the engine is required. The improved system is adapted for improved engine starting during cold weather conditions by increasing the pressure of hydraulic fluid supplied to the hydraulic turbine during engine cranking and/or decreasing the viscosity of said hydraulic fluid, thereby accelerating the turbocharger rapidly to a rotational speed for supplying sufficient air flow to the engine for starting purposes. In one form, the improved system further includes a pilot controller for regulating supply of hydraulic fluid to the hydraulic turbine to control engine air inflow, wherein the pilot controler is responsive to command signals from a master control unit which also controls engine fuel flow in accordance with a predetermined air-fuel ratio schedule throughout a range of engine operating conditions.

Hydraulic assist turbocharger system and method of operation

A combustor system for use with a turbocharged combustion engine comprises a combustor connected for continuous passage of engine exhaust gases. The combustor includes a relatively low pressure fuel injection system for atomizing fuel for combustion in a substantially vitiated atmosphere, and a fuel control system for supplying fuel to the combustor in response to engine operating conditions.

Turbocharger combustor method

Turbocharger combustor system

A control arrangement is provided for controlling the operation of an hydraulic assist turbocharger of the type including an hydraulic turbine driven by an hydraulic fluid under pressure to supplementally drive a turbocharger during engine operating conditions when supplemental air flow is required. The control arrangement includes a dual function control valve responsive to engine speed and load to regulate the supply of hydraulic fluid to the hydraulic turbine in accordance with engine air flow requirements.

Control arrangement for an hydraulic assist turbocharger

A turbocharger system for supplying charge air to a combustion engine includes a nonventilated hydraulic turbine mounted directly on the turbocharger shaft, and an auxiliary combustor mounted in-line between the engine and the turbocharger. The nonventilated hydraulic turbine is selectively driven by a high pressure hydraulic fluid to drive the turbocharger for supplying air to the auxiliary combustor, which in turn supplementally drives the turbocharger throughout a broad range of engine operation to provide additional air flow to the engine when required.

A turbocharger system for supplying charge air to a combustion engine includes a nonventilated hydraulic turbine mounted directly on the turbocharger shaft. The nonventilated hydraulic turbine is selectively driven by a high pressure hydraulic fluid to drive supplementally the turbocharger during engine operating conditions when additional air flow to the engine is required.

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Rancho Palos Verdes, CA, United States of America

Robert J Kobayashi