Method for controlling an engine of a vehicle

Patent metadata

Field	Value
Publication number	US-11293357-B2
Application number	US-201916692580-A
Country	US
Kind code	B2
Filing date	Nov 22, 2019
Priority date	Jul 19, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

An method for controlling an engine of a vehicle having the engine and a transmission may include communicating an air-controlled torque request signal between a transmission controller and an engine controller, adjusting an output torque of the engine by controlling an intake air amount of the engine based on the air-controlled torque request signal, communicating an ignition-and-fuel-controlled torque request signal between the transmission controller and the engine controller, determining a target torque value based on the ignition-and-fuel-controlled torque request signal, and adjusting the output torque of the engine by controlling an ignition timing and/or a fuel amount of the engine based on the target torque value.

First claim

What is claimed is:

1. A method of controlling an engine of a vehicle having the engine and a transmission, the method comprising:
receiving, by an engine controller, an air-controlled torque request signal from a transmission controller for a shifting operation;
adjusting, by the engine controller, an output torque of the engine by controlling an intake air amount of the engine based on the air-controlled torque request signal;
receiving, by the engine controller, an ignition-and-fuel-controlled torque request signal sent from the transmission controller after receiving the air-controlled torque request signal;
determining, by the engine controller, a target torque value based on the ignition-and-fuel-controlled torque request signal; and
further adjusting, by the engine controller, the output torque of the engine by controlling both or either of an ignition timing and a fuel amount of the engine based on the target torque value.

2. The method of claim 1 , further comprising, after the adjusting of the output torque of the engine by controlling the ignition timing and/or the fuel amount:
detecting an actual output torque value of the engine;
performing a fuel cut control of the engine based on the target torque value and the actual output torque value during the shifting operation; and
maintaining the fuel cut control of the engine during the shifting operation.

3. The method of claim 2 , wherein the performing of the fuel cut control of the engine comprises:
calculating a torque difference value between the target torque value and the actual output torque value;
determining whether the torque difference value exceeds a reference value;
determining a number of cylinders to perform the fuel cut control, when the torque difference value exceeds the reference value; and
performing the fuel cut control with respect to the number of cylinders.

4. The method of claim 2 , further comprising, after the maintaining the fuel cut control of the engine during the shifting operation,
receiving, by the engine controller, an air-controlled torque recovery request signal from the transmission controller;
starting, by the engine controller, controlling the intake air amount of the engine in response to the air-controlled torque recovery request signal, to recover the output torque of the engine to an original level;
receiving, by the engine controller, an ignition-and-fuel-controlled torque recovery request signal from the transmission controller, after receiving the air-controlled torque recovery request signal; and
controlling, by the engine controller, the ignition timing and the fuel injection amount of the engine in response to the ignition-and-fuel-controlled torque recovery request signal, to recover the output torque of the engine to the original level.

5. The method of claim 1 , further comprising, after the adjusting of the output torque of the engine by controlling both or either of the ignition timing and the fuel amount:
checking operation state data of the engine;
generating an engine torque signal based on the operation state data of the engine; and
communicating the engine torque signal between the engine controller and the transmission controller.

6. The method of claim 5 , wherein the operation state data comprises at least one of an intake air amount, a lambda value, and a rotation speed of the engine.

7. The method of claim 5 , wherein the engine torque signal represents an actual output torque of the engine.

8. A method for controlling of an engine of a vehicle, the vehicle comprising a transmission, a transmission controller to control the transmission, and an engine controller to control the engine, the method comprising:
receiving, by the engine controller, an air-controlled torque request signal from the transmission controller for a shifting operation;
adjusting, by the engine controller, an output torque of the engine by controlling an intake air amount of the engine based on the air-controlled torque request signal;
receiving, by the engine controller, an ignition-and-fuel-controlled torque request signal sent from the transmission controller after receiving the air-controlled torque request signal;
based on the ignition-and-fuel-controlled torque request signal, further adjusting, by the engine controller, the output torque of the engine by controlling both or either of an ignition timing and a fuel amount;
detecting an actual output torque value of the engine; and
performing a fuel cut control of the engine based on the actual output torque value of the engine during the shifting operation.

9. The method of claim 8 , wherein the adjusting of the output torque of the engine by controlling both or either of the ignition timing and the fuel amount comprises:
determining a target torque value based on the ignition-and-fuel-controlled torque request signal; and
adjusting the output torque of the engine by controlling an ignition timing and/or a fuel amount of the engine based on the target torque value.

10. The method of claim 9 , wherein the fuel cut control of the engine is performed based on the target torque value and an actual output torque value.

11. The method of claim 8 , further comprising, after the performing of the fuel cut control of the engine:
checking operation state data of the engine;
generating an engine torque signal based on the operation state data of the engine; and
communicating the engine torque signal between the engine controller and the transmission controller.

12. The method of claim 8 , further comprising,
maintaining the fuel cut control of the engine during the shifting operation.

13. The method of claim 12 , further comprising, after the maintaining the fuel cut control of the engine during the shifting operation,
receiving, by the engine controller, an air-controlled torque recovery request signal from the transmission controller;
starting, by the engine controller, controlling the intake air amount of the engine in response to the air-controlled torque recovery request signal, to recover the output torque of the engine to an original level;
receiving, by the engine controller, an ignition-and-fuel-controlled torque recovery request signal from the transmission controller, after receiving the air-controlled torque recovery request signal; and
controlling, by the engine controller, the ignition timing and the fuel injection amount of the engine in response to the ignition-and-fuel-controlled torque recovery request signal, to recover the output torque of the engine to the original level.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Byeon Min

Classifications

• F02D41/0087

  Selective cylinder activation, i.e. partial cylinder operation (deceleration cut-off F02D41/123) · CPC title

• F02D41/0002

  Controlling intake air · CPC title

• F02D41/345

  Controlling injection timing (F02D41/365 takes precedence) · CPC title

• Y02T10/40

  Engine management systems · CPC title

• F02D11/105 Primary

  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 title