초록 ▼

An exhaust gas control system for controlling the flow of exhaust gases from an internal combustion engine to the turbine of a turbocharger can provide efficient engine operation over a full range of engine speeds and can be used to provide vehicle braking and reduced engine warm-up time. Such a sys

An exhaust gas control system for controlling the flow of exhaust gases from an internal combustion engine to the turbine of a turbocharger can provide efficient engine operation over a full range of engine speeds and can be used to provide vehicle braking and reduced engine warm-up time. Such a system includes a combination valve upstream of a turbocharger turbine including diverter and restrictor sections, each section having a neutral position, the diverter and restrictor sections being independently operable from their neutral positions for concentrating the flow of exhaust gas to the turbine and for blocking the flow of exhaust gas to the turbine. Such systems can further include an ambient air temperature sensor for operating the diverter section and restrictor section in response to ambient air temperatures below a predetermined temperature for blocking the flow of exhaust gas to said turbocharger turbine for reduced warm-up times, a vehicle operator's switch for operating the diverter section and restrictor section for blocking the flow of exhaust gas to the turbocharger engine for vehicle braking, and an engine speed sensor for operating the diverter section in response to engine speeds below a predetermined speed for concentrating the flow of exhaust gas into the turbocharger turbine, for example, by directing exhaust gas from one passageway of a two passageway flow path to the other passageway.

대표청구항 ▼

[ We claim:] [1.] An internal combustion engine system, comprising:an internal combustion engine having a divided exhaust gas manifold with each of two exhaust passageways being connected with a bank of the cylinders of the internal combustion engine and having an air intake manifold for the cylinde

[ We claim:] [1.] An internal combustion engine system, comprising:an internal combustion engine having a divided exhaust gas manifold with each of two exhaust passageways being connected with a bank of the cylinders of the internal combustion engine and having an air intake manifold for the cylinders of the internal combustion engine;a turbocharger having an exhaust gas turbine wheel, and a divided exhaust gas turbine volute forming two exhaust gas inlets to the turbine wheel, each of said exhaust gas inlets being connected with one of the exhaust gas passageways of the exhaust gas manifold, and having a charge air compressor driven by the exhaust gas turbine;an exhaust gas control valve having two exhaust gas passageways; each exhaust gas passageway being connected between an exhaust gas passageway of the divided exhaust gas manifold and an exhaust gas passageway of the divided exhaust gas turbine volute,said exhaust gas control valve having a diverter valve to block exhaust gas flow to one passageway of the divided exhaust gas turbine volute and direct the blocked exhaust gas flow to the other passageway of the divided exhaust gas turbine volute, and having a restrictor valve to block exhaust gas flow to said other passageway of the divided exhaust gas turbine volute,actuators for said diverter valve and said restrictor valve; anda control for said valve actuators, said control including an engine speed sensor and a first actuator connected with said diverter valve, and an engine temperature sensor and a second actuator connected with said restrictor valve.