Apparatus and method for engine control

• US 10,344,688 B2
• Filed: 11/03/2016
• Issued: 07/09/2019
• Est. Priority Date: 06/02/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Han, Dong Hee, Lee, Joowon, Lee, Hyungbok, Chu, Dong Ho, Park, Jong Il
• Primary Examiner(s): Maines, Patrick D
• Application Number:
  US15/342,307
• Publication Number:
  US 20170350329A1
• Time in Patent Office: 978 Days
• CPC Class Codes: F02B 33/34 with rotary pumps with cell-type pressure exchangers or the like F02B33/42
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/1004 Estimation of the output torque
• CPC Class Codes: F02D 2200/101 Engine speed
• CPC Class Codes: F02D 2200/602 Pedal position
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: F02D 41/04 Introducing corrections for particular operating conditions F02D41/14 takes precedence
• CPC Class Codes: F02D 9/08 Throttle valves specially adapted therefor; Arrangements of such valves in conduits
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An apparatus for controlling an engine includes an engine including a plurality of combustion chambers for generating driving torque by burning a fuel, a high-capacity turbocharger including a turbine rotated by the exhaust gas exhausted from the combustion chambers and a compressor rotated together with the turbine for compressing exhaust gas exhausted from the combustion chamber, an electric supercharger including a motor and an electric compressor operated by the motor, a throttle valve for adjusting an intake air amount supplied to the combustion chamber, a driving information detector for detecting driving information including a required torque and an engine speed, and a controller for determining a driving region of the engine from the driving information detected by the driving information detector, and controlling engine torque by adjusting an opening of the throttle valve and an output of the motor according to the driving region of the engine.

Claims

1. An apparatus for controlling an engine, comprising:

an engine including a plurality of combustion chambers for generating driving torque by burning a fuel;

a high-capacity turbocharger including a turbine rotated by the exhaust gas exhausted from the combustion chambers and a compressor rotated together with the turbine for compressing exhaust gas exhausted from the combustion chamber;

an electric supercharger including a motor and an electric compressor operated by the motor in order to supply compressed air to the combustion chamber;

a throttle valve for adjusting an intake air amount supplied to the combustion chamber;

a plurality of sensors for detecting driving information including a required torque and an engine speed; and

a controller for determining a driving region of the engine from the driving information detected by the plurality of sensors, and controlling engine torque by adjusting an opening of the throttle valve and an output of the motor according to the driving region of the engine,

wherein the driving region of the engine is divided into a low-load region, a low/middle-speed and high-load region and a high-speed and high-load region,

wherein the controller;

controls the engine torque by adjusting an opening of the throttle valve when the driving region of the engine is the low-load region,

controls the engine torque by maximally opening the throttle valve and adjusting an output of the motor when the driving region of the engine is the low/middle-speed and high-load region, and

controls the engine torque by adjusting the opening of the throttle valve and an air supercharged by the turbocharger when the driving region of the engine is the high-speed and high-load region, and

wherein the controller controls the opening of the throttle valve by considering an intake air amount based on a pressure ratio between a front end and a rear end of the throttle valve.

2. The apparatus of claim 1, wherein all of the exhaust gas exhausted from the combustion chamber flows into the turbine disposed in an exhaust line, and the exhaust gas is exhausted to an outside through the exhaust line.

3. A method for controlling an engine, the engine including a plurality of combustion chambers;

a high-capacity turbocharger operated by exhaust gas exhausted from the combustion chamber and compressing intake air;

an electric supercharger including a motor and an electric compressor operated by the motor for supplying compressed air to the combustion chamber; and

a throttle valve adjusting an intake air amount supplied to the combustion chamber;

the method comprising;

detecting a driving information including a required torque of a driver, an engine speed and an engine torque using a plurality of sensors;

determining a driving region of the engine from the driving information using a controller; and

controlling, by the controller, an engine torque by adjusting an opening of a throttle valve and an output of the motor according to the driving region of the engine,

wherein the driving region of the engine is divided into a low-load region, a low/middle-speed and high-load region and a high-speed and high-load region, and

wherein the engine torque is controlled by adjusting an opening of the throttle valve when the driving region of the engine is the low-load region,

the engine torque is controlled by maximally opening the throttle valve and adjusting an output of the motor when the driving region of the engine is the low/middle-speed and high-load region, and

the engine torque is controlled by adjusting the opening of the throttle valve and an air supercharged by the turbocharger when the driving region of the engine is the high-speed and high-load region, wherein the opening of the throttle valve is controlled by considering an intake air amount based on a pressure ratio between a front end and a rear end of the throttle valve.