US 5,704,210 AGranted

Intercooled supercharged gas generator engine

OwnerLin-Shu Wanginventor

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Abstract

A gas generation engine having improved fuel economy and performance comprises a gas generator in the form of a supercharged internal combustion engine coupled to an expander in the form of a gas turbine. The exhaust produced by the internal combustion engine is utilized to drive the turbine. The values for the supercharging pressure ratio and internal combustion engine exhaust back pressure are chosen such that increased thermal efficiency and power output can be simultaneously obtained. The value for the peak cylinder pressure is significantly higher than the typical value for existing diesel engines. The form of internal combustion engine may be a four-stroke cycle piston engine with intercooled supercharging, the internal combustion engine driving the supercharger as well as providing the turbine input. The exhaust for the internal combustion engine may be further divided into two parts, coupled to different stages of the turbine, to more efficiently match the pressure characteristics of the exhaust to the turbine.

Claims9

Dependent claims

An improved gas generator engine, comprising an expander having a high pressure inlet port, a low pressure exhaust port and an output shaft for generating brake work;

a gas generator comprising a piston engine unit having an air input port, an exhaust port and an output shaft, an intercooled supercharger driven by said piston engine unit output shaft and coupled to said piston unit air input port, said piston engine output shaft being coupled solely to said supercharger, said piston engine unit being coupled through its exhaust port to said expander inlet port for generating a gas input for said expander and having a elevated output pressure P.sub.Back, said piston engine unit further having means for controlling its back pressure to shift charge expansion enthalpy from said piston unit to said expander, said controlling means comprising means for dividing an exhaust from said piston engine unit into a first portion at pressure P.sub.Back for a maximum portion of an exhaust interval of said piston engine unit and a second portion at a pressure lower than P.sub.Back for a minimum portion of the exhaust interval required and timed to allow input air to be received by a cylinder of the piston engine unit.

Dependencies are inferred from the claim text.

Facts

Application: 08/671,274Filed 27 Jun 1996 · continuation
Priority: 18 Dec 1991
Granted: 6 Jan 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

F02B 33/44
Engines characterised by provision of pumps for charging or scavenging: passages conducting the charge from the pump to the engine inlet, e.g.…
F02B 29/0412
Layout of the intake air cooling or coolant circuit: multiple heat exchangers arranged in parallel or in series
F02B 41/10
Engines with prolonged expansion: in exhaust turbines
F02C 5/06
Gas-turbine plants characterised by the working fluid being generated by intermittent combustion: the working fluid being generated in an…

Family

Serial810,728Parent of this continuation · filed 18 Dec 1991
Serial150,545Parent of this continuation-in-part · filed 10 Nov 1993
Serial319,619Parent of this continuation · filed 7 Oct 1994
US 5,704,210 AThis patent

From the US filing history. Foreign family members aren’t listed.

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