Control method for ISG of vehicle provided with manual transmission and vehicle of which the control method is applied

Patent metadata

Field	Value
Publication number	US-11286897-B2
Application number	US-202016878187-A
Country	US
Kind code	B2
Filing date	May 19, 2020
Priority date	Sep 20, 2019
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A control method of controlling an idle stop-and-go (ISG) function of a vehicle provided with a manual transmission includes: determining, by a controller, whether an ISG function activation condition is satisfied based on vehicle running state information of the vehicle; stopping an engine, by the controller, when the ISG activation condition is satisfied; determining, by the controller, whether a first starting condition in which a shift stage of the manual transmission is a neutral stage is satisfied; determining, by the controller, whether a second starting condition in which a shift stage of the manual transmission is a driving stage is satisfied; and restarting, by the controller, the engine when the first starting condition or the second starting condition is satisfied. The vehicle running state information includes: an operation information of the manual transmission and a clutch pedal, and current and recorded vehicle speeds of the vehicle.

First claim

What is claimed is:

1. A control method of controlling an idle stop-and-go (ISG) function of a vehicle provided with a manual transmission, the control method comprising:
determining, by a controller, whether an ISG function activation condition is satisfied based on vehicle running state information of the vehicle, where the vehicle running state information includes: whether the manual transmission is engaged with gears, whether a top signal or a bottom signal of a clutch pedal sensor is generated, a current vehicle speed, and a recorded vehicle speed of the vehicle;
stopping an engine, by the controller, when the ISG function activation condition is satisfied;
determining, by the controller, whether a first starting condition in which a shift stage of the manual transmission is a neutral stage is satisfied;
determining, by the controller, whether a second starting condition in which the shift stage of the manual transmission is a driving stage is satisfied; and
restarting, by the controller, the engine when the first starting condition or the second starting condition is satisfied.

2. The control method of claim 1 , wherein:
the ISG function activation condition is satisfied when the controller determines that the shift stage of the manual transmission is the neutral stage, an operation signal of the clutch pedal sensor is not generated, the current vehicle speed is less than a predetermined first vehicle speed, and the recorded vehicle speed exceeds a predetermined second vehicle speed.

3. The control method of claim 1 , wherein:
in a state where the ISG function is activated to stop the engine, the first starting condition is satisfied when the controller determines that the shift stage of the manual transmission is the neutral stage and the clutch pedal sensor outputs the top signal or the bottom signal in an off state.

4. The control method of claim 1 , wherein:
in a state where the ISG function is activated to stop the engine, the second starting condition is satisfied when the controller determines that the shift stage of the manual transmission is the driving stage and the bottom signal of the clutch pedal sensor is outputted in an off state.

5. A vehicle implementing an idle stop-and-go (ISG) function and provided with a manual transmission, the vehicle comprising:
a vehicle operation state detector including:
a shift sensor configured to detect a shift stage of the manual transmission and output a corresponding signal,
a clutch pedal sensor configured to output a top signal or a bottom signal based on an operation of a clutch pedal,
a brake pedal sensor configured to detect an operation of a brake pedal and output a corresponding signal, and
a vehicle speed sensor configured to measure a vehicle speed and output a corresponding signal;
an injector configured to inject fuel into an engine;
an operation motor connected to the engine and configured to selectively start the engine;
a controller configured to control the injector and the operation motor based on the corresponding signals from the vehicle operation state detector; and
a memory configured to communicate with the controller and configured to record the vehicle speed,
wherein:
based on the corresponding signals from the vehicle operation state detector, the controller is configured to: determine that an ISG function activation condition is satisfied when the shift stage of the manual transmission is a neutral stage, an operation signal of the clutch pedal sensor is not generated, and a current vehicle speed is lower than a predetermined first reference vehicle speed, and the vehicle speed recorded in the memory is higher than a predetermined second reference vehicle speed, and
when the ISG function activation condition is satisfied, the controller is configured to control the injector to stop fuel injection into the engine.

6. The vehicle of claim 5 , wherein after the engine stops, the controller is configured to:
determine whether a first starting condition in which the shift stage of the manual transmission is the neutral stage is satisfied,
determine whether a second starting condition in which the shift stage of the manual transmission is a driving stage is satisfied, and
restart the engine when the first starting condition or the second starting condition is satisfied.

7. The vehicle of claim 5 , wherein in a state where the ISG function is activated to stop the engine, the controller is configured to restart the engine when the controller determines that the shift stage of the manual transmission is the neutral stage and the clutch pedal sensor outputs the top signal or the bottom signal in an off state.

8. The vehicle of claim 5 , wherein in a state where the ISG function is activated to stop the engine, the controller is configured to restart the engine when the controller determines that the shift stage of the manual transmission is a travel stage and the bottom signal of the clutch pedal sensor is outputted in an off state.

9. The vehicle of claim 5 , wherein the operation motor is a mild hybrid starter generator (MHSG).

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Bang Jung Hwan

Classifications

• B60W10/06 Primary

  including control of combustion engines · CPC title

• B60W30/18054

  at stand still, e.g. engine in idling state (hill holding B60W30/18118) · CPC title

• F16H63/50

  Signals to an engine or motor · CPC title

• F02D41/0225

  in relation with the gear ratio or shift lever position · CPC title

• B60W2510/10

  Change speed gearings · CPC title