US 2019/0195175 A1 · EXHAUST GAS RECIRCULATION SYSTEM FOR INTERNAL COMBUSTION ENGINE

Abstract

An exhaust gas recirculation system for an internal combustion engine is provided. The exhaust gas recirculation system includes: an EGR passage configured to connect an exhaust gas passage of the internal combustion engine with an intake air passage; an EGR cooling system arranged at the EGR passage; and a control device configured to control the EGR cooling system. The control device is configured to provide feedback control of the cooling efficiency of the EGR cooling system to cause the temperature of intake gas suctioned into a cylinder of the internal combustion engine to approach a target intake gas temperature. The control device is configured to more increase the amount of change of the cooling efficiency when the flow rate of EGR gas recirculated is less.

Claims4

Dependent claims

An exhaust gas recirculation system for an internal combustion engine, the exhaust gas recirculation system comprising:

an EGR passage configured to connect an exhaust gas passage of the internal combustion engine with an intake air passage;
an EGR cooling system arranged at the EGR passage;
and
a control device configured to control the EGR cooling system,
wherein the control device is configured to provide feedback control of a cooling efficiency of the EGR cooling system to cause a temperature of intake gas suctioned into a cylinder of the internal combustion engine to approach a target intake gas temperature, and
wherein the control device is configured to more increase an amount of change of the cooling efficiency when a flow rate of EGR gas recirculated is less.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/181,660Filed 6 Nov 2018

Priority

JP 2017-25121027 Dec 2017

Published

27 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

F02M 26/33
With coolers in the recirculation passage: controlling the temperature of the recirculated gases
F02D 41/0047
Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures:…
F02D 41/0072
Specific aspects of external EGR control: estimating, calculating or determining the EGR rate, amount or flow
F02D 41/0077
Controlling exhaust gas recirculation [EGR]: control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position

Exhaust gas recirculation system for internal combustion engine

Life of this patent

Exhaust gas recirculation system for internal combustion engine

Life of this patent

Abstract

Claims4