Engine control system and method

Patent metadata

Field	Value
Publication number	US-9689300-B2
Application number	US-201514798491-A
Country	US
Kind code	B2
Filing date	Jul 14, 2015
Priority date	Dec 15, 2014
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

An engine control system is provided and includes an engine having combustion chambers and provides driving torque through combustion of a fuel injected into the combustion chambers. A turbocharger includes a turbine rotated according to flow energy of exhaust gas, a compressor compressing external air, and a vane adjusting amount of exhaust gas supplied to the turbine. An EGR device recirculates exhaust gas to the combustion chamber. An exhaust manifold includes a body with an internal fluid path, exhaust inlets in which exhaust gas is introduced, a partition to form internal fluid paths, and an exhaust outlet to which exhaust gas is exhausted. Temperature sensors measure temperature of exhaust gas flowing through the internal fluid paths. A controller adjusts an opening amount of the vane of the turbocharger, exhaust gas recirculated using the EGR device, and fuel to be injected to the combustion chambers based on measured temperature.

First claim

What is claimed is:

1. An engine control method comprising:
measuring, by a first temperature sensor, a temperature of exhaust gas flowing through a first internal fluid path of an exhaust manifold;
measuring, by a second temperature sensor, a temperature of exhaust gas flowing through a second internal fluid path of the exhaust manifold;
measuring, by a controller, an amount of exhaust gas exhausted from a plurality of combustion chambers of an engine flowing through an internal fluid path divided into the first internal fluid path and the second internal fluid path by a partition;
determining, by the controller, whether a difference between the temperature of exhaust gas detected by the first temperature sensor and the temperature of exhaust gas detected by the second temperature sensor is less than or equal to a preset temperature; and
adjusting, by the controller, an amount of exhaust gas recirculated to the combustion chambers, an opening amount of a vane of a turbocharger, and an amount of a fuel to be injected to the plurality of combustion chambers using the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor.

2. The engine control method of claim 1 , wherein when a difference between the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor is less than the preset temperature, the adjustment of the amount of exhaust gas includes:
determining, by the controller, an average temperature by averaging the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor for a predetermined time; and
adjusting, by the controller, the amount of exhaust gas recirculated to the combustion chambers and the opening amount of the vane of the turbocharger based on the average temperature.

3. The engine control method of claim 1 , wherein when a difference between the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor is greater than the preset temperature, the adjustment of the amount of exhaust gas includes:
determining, by the controller, whether the temperature of the exhaust gas detected by the first temperature sensor is greater than the temperature of the exhaust gas detected by the second temperature sensor; and
reducing, by the controller, an amount of a fuel to be supplied to one of the combustion chambers that is connected to the second internal fluid path when the temperature of the exhaust gas detected by the first temperature sensor is less than the temperature of the exhaust gas detected by the second temperature sensor.

4. The engine control method of claim 3 , further comprising when the temperature of the exhaust gas detected by the first temperature sensor is equal to or greater than the temperature of the exhaust gas detected by the second temperature sensor;
determining, by the controller, whether an operating region of a vehicle is a main operating region; and
reducing, by the controller, an amount of a fuel to be supplied to one of the combustion chambers that is connected to the first internal fluid path when the operating region of a vehicle is the main operating region.

5. The engine control method of claim 4 , further comprising:
increasing, by the controller, an amount of a fuel to be supplied to one of the combustion chambers that is connected with the second internal fluid path when the operating region of a vehicle is not the main operating region.

6. The engine control method of claim 4 , further comprising:
determining, by the controller, that the operating region of a vehicle is the main operating region when engine speed is equal to or greater than a preset speed and an opening amount of a throttle valve is a preset value.

7. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:
program instructions that control a first temperature sensor to measure a temperature of exhaust gas flowing through a first internal fluid path of an exhaust manifold;
program instructions that control a second temperature sensor to measure a temperature of exhaust gas flowing through a second internal fluid path of the exhaust manifold;
program instructions that measure an amount of exhaust gas exhausted from a plurality of combustion chambers of an engine flowing through an internal fluid path divided into the first internal fluid path and the second internal fluid path by a partition;
program instructions that determine whether a difference between the temperature of exhaust gas detected by the first temperature sensor and the temperature of exhaust gas detected by the second temperature sensor is less than or equal to a preset temperature; and
program instructions that adjust an amount of exhaust gas recirculated to the combustion chambers, an opening amount of a vane of a turbocharger, and an amount of a fuel to be injected to the plurality of combustion chambers using the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor.

8. The non-transitory computer readable medium of claim 7 , wherein when a difference between the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor is less than the preset temperature, the adjustment of the amount of exhaust gas includes:
program instructions that determine an average temperature by averaging the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor for a predetermined time; and
program instructions that adjust the amount of exhaust gas recirculated to the combustion chambers and the opening amount of the vane of the turbocharger based on the average temperature.

9. The non-transitory computer readable medium of claim 7 , wherein when a difference between the temperature of the exhaust gas detected by the first temperature sensor and the temperature of the exhaust gas detected by the second temperature sensor is greater than the preset temperature, the adjustment of the amount of exhaust gas includes:
program instructions that determine whether the temperature of the exhaust gas detected by the first temperature sensor is greater than the temperature of the exhaust gas detected by the second temperature sensor; and
program instructions that reduce an amount of a fuel to be supplied to one of the combustion chambers that is connected to the second internal fluid path when the temperature of the exhaust gas detected by the first temperature sensor is less than the temperature of the exhaust gas detected by the second temperature sensor.

10. The non-transitory computer readable medium of claim 9 , further comprising when the temperature of the exhaust gas detected by the first temperature sensor is equal to or greater than the temperature of the exhaust gas detected by the second temperature sensor;
program instructions that determine whether an operating region of a vehicle is a main operating region; and
program instructions that reduce an amount of a fuel to be supplied to one of the combustion chambers that is connected to the first internal fluid path when the operating region of a vehicle is the main operating region.

11. The non-transitory computer readable m

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Jong Gu

Classifications

• F02D41/0007

  for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12) · CPC title

• F01N13/008 Primary

  Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439) · CPC title

• Y02T10/144

  Cross-Sectional Technologies · mapped topic

• F01N13/107

  More than one exhaust manifold or exhaust collector · CPC title

• F02B37/24

  by using pumps or turbines with adjustable guide vanes · CPC title