# US 2019/0376482 A1 · Vehicle system including idle stop and go function and method for controlling idle stop and go

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- Number: US 2019/0376482 A1
- Document ID: US20190376482A1
- Status: Published application
- Kind: A1
- Application number: 16/162,722
- Filed: 2018-10-17
- Published: 2019-12-12
- Earliest claimed: 2018-06-12
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Jin KIM
- Web page: https://patentgrep.com/patent/US20190376482A1

## CPC

- F02N 11/0837: {Environmental conditions thereof, e.g. traffic, weather or road conditions}
- B60W 10/06: including control of combustion engines
- F02N 11/0825: {related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state}
- F02N 11/0829: {related to special engine control, e.g. giving priority to engine warming-up or learning}
- H04W 4/02: Services making use of location information
- H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
- F02N 2200/061: Battery state of charge [SOC]
- F02N 2200/062: Battery current
- F02N 2200/063: Battery voltage
- F02N 2200/064: Battery temperature
- F02N 2200/0801: Vehicle speed
- F02N 2200/124: Information about road conditions, e.g. road inclination or surface
- F02N 2300/304: with other systems inside the vehicle
- Y02T 10/40: Engine management systems
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An ISG vehicle system may include an alternator supplying electric power of a vehicle and alternating engine power to electrical energy, a battery storing the electric power of the vehicle, an alternator supplying electric power of a vehicle and alternating engine power to electrical energy, a V2X controller receiving external infrastructure information and determining vehicle location, an ISG controller obtaining the external infrastructure information and the vehicle location through communication with the V2X controller and obtaining the status of the battery and charge amount information through communication with the battery sensor to determine operable time of ISG (Idle Stop and Go) function of the vehicle and whether the ISG function operates, and an engine controller receiving operation signal of the ISG function through communication with the ISG controller to determine whether the engine operates.

## Claims

### Claim 1

An idle stop & go (ISG) vehicle system, comprising:
an alternator supplying electric power of a vehicle and alternating engine power to electrical energy;
a battery storing the electric power of the vehicle;
a battery sensor monitoring a status of the battery, transmitting and receiving information externally, and determining a charge amount according to the status of the battery;
a V2X controller configured for receiving external infrastructure information and determining vehicle location;
an ISG controller obtaining the external infrastructure information and the vehicle location through communication with the V2X controller and obtaining the status of the battery and charge amount information through communication with the battery sensor to determine operable time of ISG function of the vehicle and when the ISG function operates; and
an engine controller configured for receiving an operation signal of the ISG function through communication with the ISG controller to determine when an engine operates.

### Claim 2 (depends on 1)

The ISG vehicle system of claim 1, further including:
electric loads consuming electricity and including an air conditioning blower, a chassis, an engine injector, a seat heating wire, and a ventilation motor.

### Claim 3 (depends on 2)

The ISG vehicle system of claim 2, further including:
an electric load controller configured for receiving signal of the electric loads and for controlling an output of the electric loads to realize controlling function according to a predetermined function of an air conditioning system of the vehicle, a seat system, the engine and a transmission.

### Claim 4 (depends on 1)

The ISG vehicle system of claim 1, wherein the battery sensor includes:
a communication unit transmitting and receiving information with outside thereof;
a voltage sensing unit monitoring voltage status of the battery;
a current sensing unit monitoring current coming and going to the battery;
a temperature sensing unit monitoring liquid temperature of the battery; and
a state of charge (SOC) determining unit determining status of charge of the battery using the voltage, the current, and the temperature of the battery.

### Claim 5 (depends on 1)

The ISG vehicle system of claim 1, wherein the V2X controller transmits information received from outside through wireless network from an external infrastructure information transmitting device to inside the vehicle.

### Claim 6 (depends on 5)

The ISG vehicle system of claim 5, wherein the V2X controller combines global poisoning system (GPS) information received from a vehicle navigation unit and external infrastructure information received from the external infrastructure information transmitting device to determine the vehicle location, and transmits the external infrastructure information and the vehicle location to the ISG controller.

### Claim 7 (depends on 1)

The ISG vehicle system of claim 1, wherein the ISG controller includes:
a communication unit communicates with the battery sensor and the V2X controller; and
an ISG driving determination unit realizing when the ISG function of the vehicle operates using information related to the statue of the battery, the external infrastructure information and vehicle information obtained through the communication unit.

### Claim 8 (depends on 7)

The ISG vehicle system of claim 7, wherein the external infrastructure information includes road and location information and road signal information.

### Claim 9 (depends on 8)

The ISG vehicle system of claim 8, wherein the road and location information includes road type, diverging road number, current vehicle location, and current driving road lane number.

### Claim 10 (depends on 8)

The ISG vehicle system of claim 8, wherein the road signal information includes signal type of diverging road, and signal change time matrix of the signal type of diverging road.

### Claim 11 (depends on 7)

The ISG vehicle system of claim 7, wherein the information related to the statue of the battery includes battery charge amount, battery overage degree, battery consumption amount, and battery error information.

### Claim 12 (depends on 7)

The ISG vehicle system of claim 7, wherein the vehicle information includes current ISG status, ISG operable time, current time, vehicle speed, and fuel injection amount.

### Claim 13

A method for controlling idle stop & go (ISG) operation of a vehicle, the method including:
receiving road and location information, road signal information, information related to a statue of a battery, and vehicle information by an ISG controller;
renewing the road information, map data, time information, and the information related to the statue of the battery according to a vehicle location by the ISG controller;
renewing road signal change time matrix according to the time information;
renewing ISG operable time by the information related to the statue of the battery;
determining when a vehicle speed is 0;
determining a vehicle stop time by the road signal change time matrix when the vehicle speed is 0;
obtaining fuel injection amount information necessary to restart an engine after the ISG operates;
determining when fuel amount being saved by the ISG operation is more than fuel injection amount required to restart the engine;
transmitting a signal to an engine controller to turn off the engine when the fuel amount being saved by the ISG operation is more than the fuel injection amount required to restart the engine;
determining when the engine is turned off;
determining when the ISG operable time is less than road signal change time when the engine is turned off;
transmitting a signal to the engine controller to operate the engine when the ISG operable time is less than the road signal change time; and
obtaining a fuel injection amount consumed during restarting the engine after the ISG operation is performed and determining a mean value of the fuel injection amount.

### Claim 14 (depends on 13)

The method for controlling the ISG of claim 13, wherein the road and location information and the road signal information are collected from an external infrastructure information transmitting device and transmitted to the ISG controller by a V2X controller.

### Claim 15 (depends on 13)

The method for controlling the ISG of claim 13, wherein the information related to the statue of the battery is collected as battery charge amount information by a battery sensor.

### Claim 16 (depends on 13)

The method for controlling the ISG of claim 13, wherein the vehicle location and the map data are collected by a navigation unit.

### Claim 17 (depends on 13)

The method for controlling the ISG of claim 13, wherein the ISG operable time is determined as a time at a minimum charge amount in which vehicle start is possible after obtaining inclination of battery consumption amount by obtaining a difference value between initial battery charge amount and battery overage degree, current time, and battery charge amount value on a basis of the information related to the statue of the battery.

### Claim 18 (depends on 17)

The method for controlling the ISG of claim 17, wherein the current time is obtained on a basis of time information transmitted from the V2X controller and a global poisoning system (GPS).

### Claim 19 (depends on 18)

The method for controlling the ISG of claim 18, wherein total fuel injection amount is determined by accumulating mean values of fuel injection amount required to start the engine when the ISG operation is performed.