# US 11,028,813 B2 · Method for controlling a vehicle including an idle stop and go function

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- Number: US 11,028,813 B2
- Document ID: US11028813B2
- Status: Granted
- Kind: B2
- Application number: 16/009,997
- Filed: 2018-06-15
- Published: 2019-06-20
- Granted: 2021-06-08
- Earliest claimed: 2017-12-18
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Jung Hwan Bang; Young Ho Jung; Tae Suk Lee
- Web page: https://patentgrep.com/patent/US11028813B2

## CPC

- F02N 11/0833: {Vehicle conditions (F02N11/0822, F02N11/0825 take precedence)}
- F02D 41/042: {for stopping the engine}
- F02N 11/0822: {related to action of the driver}
- F02N 2200/022: Engine speed
- F02N 2200/0801: Vehicle speed
- F02N 2200/0802: Transmission state, e.g. gear ratio or neutral state
- F02N 2200/102: Brake pedal position
- F02N 2200/103: Clutch pedal position
- Y02T 10/40: Engine management systems
- F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for controlling a vehicle includes: receiving a detection signal required to perform an idle stop and go (ISG) function; and controlling the vehicle to enter into an ISG state where a fuel supply to an engine is cut off and the engine stops when the vehicle decelerates or stops in response to the detection signal. The detection signal includes a fuel cut off signal in on state when the vehicle decelerates and in off state at a reference revolution number of the engine, a gear engagement signal, a clutch pedal signal indicating whether a clutch pedal operating a clutch is operated, and a brake pedal signal indicating whether a brake pedal is operated. A controller generates an ISG entry signal based on the fuel cut off signal, the gear engagement signal, the clutch pedal signal, and the brake pedal signal to enter the vehicle into the ISG state.

## Claims

### Claim 1

A method for controlling a vehicle including an idle stop function during operation of the vehicle, the method comprising:
receiving, by a controller, a detection signal required to perform the idle stop function; and
controlling, by the controller, in response to the detection signal, the vehicle to enter into an idle stop state, wherein a fuel supply to an engine of the vehicle is cut off and the engine stops when the vehicle decelerates or stops according to the idle stop function,
wherein the detection signal includes (a) a fuel cut off signal that is in an on state when the vehicle decelerates, is in an off state at a reference revolution number of the engine, and indicates whether a fuel supply to the engine is cut off, (b) a gear engagement signal indicating whether a gear included in a transmission of the vehicle is engaged, (c) a clutch pedal signal indicating whether a clutch pedal operating a clutch of the vehicle is operated, and (d) a brake pedal signal indicating whether a brake pedal of the vehicle is operated,
wherein the controller is configured to generate an idle stop entry signal based on (i) the fuel cut off signal that is in an on state, (ii) the gear engagement signal that is in an on state, (iii) the clutch pedal signal that is in an off state, and (iv) the brake pedal signal that is in an on state, and wherein the controller is configured to enter the vehicle into the idle stop and go state based on the idle stop and go entry signal,
wherein the reference revolution number of the engine is greater than an idle revolutions per minute of the engine and has a value close to the idle revolutions per minute, and
wherein the gear of the transmission is in an engagement state and the clutch pedal signal is in an off state when the fuel cut off signal is in an on state while the vehicle is in the idle stop state during the operation of the vehicle.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
determining, by the controller, whether the gear of the transmission is switched from a neutral state to a gear engagement state after the clutch pedal signal is switched to an on state, and
wherein the controller is configured to release the idle stop state when the gear of the transmission is switched from the neutral state to the gear engagement state.

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
determining, by the controller, whether the brake pedal signal is switched to an off state when the gear of the transmission is not switched from the neutral state to the gear engagement state, and
wherein the controller is configured to release the idle stop state when the brake pedal signal is switched to the off state.

### Claim 4 (depends on 1)

The method of claim 1, wherein the transmission includes a manual transmission.