Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Kia Motors Gorporation

Hyundai Motor Gompany

Young-Kyu Oh

Keum-Jin Park

Tae-Ho Ahn

Se-Geun Kim

Jeong-Ho Seo

Youn-Su Kim

An active purge system (APS) according to a driving state of a hybrid vehicle includes an active purge unit (APU) configured to pressurize a vaporized gas generated in a fuel tank of the hybrid vehicle and supply the pressurized vaporized gas to an intake pipe, and a control unit configured to control the APU, where the control unit gradually controls a processing amount of the vaporized gas according to the driving state of the hybrid vehicle. The processing amount of the vaporized gas is gradually controlled using the APS according to the driving state of the hybrid vehicle, particularly, a number of places at which slip occurs in a power transmission system of the hybrid vehicle so that degradation of driving ability due to the occurrence of slip is reduced.

Active purge system and purging method according to operating state of hybrid vehicle

The present disclosure relates to an active purge system and an active purge method for a hybrid vehicle, and changes a control method for the throughput of the evaporation gas according to the engine torque according to a change in an optimal operating line, the system efficiency, or the state of charge (SOC) condition of a battery using an active purge unit for pressing the evaporation gas generated by a fuel tank and supplying the pressed evaporation gas to an intake pipe, thereby efficiently purging the evaporation gas.

Active purge system for hybrid vehicle and active purge method for hybrid vehicle

A method of compensating fuel for each cylinder of an engine during purging may include, compensating a fuel injection time for each cylinder depending on an amount of intake air for each cylinder, an injection pressure of the injector, and an internal pressure of a combustion chamber of the engine; pressurizing a vaporized gas adsorbed into a canister and injecting the pressurized vaporized gas into the intake pipe by operating an active purge pump; and estimating an amount of vaporized gas reaching each combustion chamber and converting the fuel injection time depending on the estimated amount of vaporized gas.

Method of compensating fuel for each cylinder of an engine during purging

A method of controlling a split inflow of condensate water in a hybrid engine includes: determining whether condensate water is generated from an exhaust gas recirculation (EGR) device of a hybrid electric vehicle (HEV); determining an amount of the condensate water introduced into an hybrid engine; determining whether a vehicle speed of the HEV is within a predetermined speed range; determining whether a request torque of the HEV is within a predetermined torque range; determining whether a duration time of the vehicle speed within the predetermined speed range, and a duration time of the request torque within the predetermined torque range are greater than or equal to a predetermined duration time, respectively; and when the determined duration times are greater than or equal to the predetermined duration time, increasing an engine torque of the HEV.

Method of controlling split inflow of condensate water in hybrid engine

An active dual purge system includes: an intake pipe, a compressor to compress air, a canister to collect an evaporation gas, a purge line extending from the canister to a front end of the compressor, a branch line branching off from the purge line and extending to a rear end of a throttle valve body, a purge pump installed in the purge line, a purge valve installed in the purge line, a vent valve installed in a vent line extending from the canister toward the atmosphere, a first sensor installed in the purge line, and a second sensor installed in the purge line, and a controller to perform different tests on the purge pump, the purge valve and the vent valve in different operating states, and diagnose whether at least one of the purge line, the branch line, or the vent line are abnormal using on-board diagnosis (OBD).

Active dual purge system and method of diagnosing active dual purge system using onboard diagnosis

The present disclosure relates to a method for removing residual purge gas in operating an active purge system and includes determining evaporation gas purge stop in a control unit, closing a PCSV mounted on a purge line connecting a canister and an intake pipe, and determining whether all of the evaporation gas flowed into the intake pipe is flowed into a combustion chamber, so that all of the evaporation gas flowed into an intake pipe during travelling can be flowed into and combusted in the combustion chamber.

Method for removing residual purge gas

A mixed fuel amount control system applying active purging includes: a fuel tank in which biofuel and fossil fuel are mixed and stored, an active purging device to supply an evaporated gas evaporated in the fuel tank to an intake pipe, and a concentration sensor to sense a mixing ratio of the biofuel stored in the fuel tank changes. In particular, the flow rate and the concentration of the evaporated gas of the fuel tank flowing into the intake pipe are changed according to a mixing ratio of biofuel and fossil fuel.

Mixed fuel amount control system applying active purging

An active purge system may include: a canister to collect therein an evaporation gas evaporated from a fuel tank; a purge line to connect the canister to an intake pipe; a purge pump to pressurize the evaporation gas to allow the evaporation gas to move from the canister to the intake pipe; a purge valve installed on the purge line to be located between the purge pump and the intake pipe; and an engine connected to the intake pipe. In particular, the engine includes an injector installed on a cylinder head, an intake valve, and an exhaust valve.

Active purge system and active purge method

An evaporation gas active purge system may include a purge line of connecting a canister for absorbing an evaporation gas of a fuel tank to an intake pipe; a purge pump mounted on the purge line; a purge valve mounted on the purge line to be disposed between the purge pump and the intake pipe; a pressure sensor mounted on the purge line to be disposed between the purge pump and the purge valve; and a control unit of receiving a signal from the pressure sensor, and transmitting an operating signal to the purge pump and the purge valve, wherein the control unit controls the purge pump and the purge valve by an engine condition and a vehicle speed.

Evaporation gas active purge system and active purge method

A method for controlling the air-fuel ratio of a vehicle includes: calculating the air amount charged in a cylinder of an engine by using a fresh air amount, a residual air amount remaining inside the cylinder of the engine, and a backflow gas amount flowing back into the cylinder upon the valve overlap of an intake vale and an exhaust valve of the engine, correcting it with the purge gas flow rate supplied to an intake manifold of the engine when the active purge system is operated, calculating the final fuel amount by correcting the fuel amount injected by a fuel injection device with the amount of the fuel component contained in the purge gas when the active purge system is operated, and controlling the air-fuel ratio based on the final air amount and the final fuel amount.

Method for controlling air-fuel ratio of vehicle having variable valve duration apparatus and active purge system

A method for preventing an engine air flow calculation error applied to an engine system may classify an engine operation area of an engine into a sensor measurement deviation generation area, medium/high load areas, and a low load area by an ECU, and classify an air flow calculation applied to a cylinder charging amount of the engine as one of an air flow calculation control applying a compensation measurement air flow to the sensor measurement deviation generation area, an air flow calculation control applying a measurement pressure to the medium/high load areas, and an air flow calculation control applying a measurement air flow to the low load area, excluding influence of an HFM sensor error causing a change in a fresh air charge and inaccuracy of an exhaust gas recirculation (EGR) air flow modeling/active purge air flow modeling in the entire operation area of the engine.

Method for preventing engine air flow calculation error and engine system thereof

A method of determining an air volume in an active purge system may include checking whether an engine operates in an idle state; determining an air volume reaching a combustion chamber of the engine in response to a signal received from a sensor provided in an intake pipe; checking whether an evaporation gas collected in a canister is introduced into the intake pipe; estimating an amount of the evaporation gas introduced into the intake pipe and primarily correcting the air volume determined according to the estimated amount of the evaporation gas; checking whether an opening holding time of an intake valve in the engine is varied due to an operation of a continuously variable valve duration (CVVD) system electrically connected to the controller; and deriving a correction variable by substituting an operation duty of the CVVD system into a formula, a table, or a map provided in advance, and secondarily correcting the primarily corrected air volume according to the correction variable.

Method of calculating air volume in active purge system

A method of securing brake booster negative pressure is provided. The method includes operating a purge pump that is connected to a canister having evaporation gas absorbed thereon and a brake booster and determining whether the evaporation gas is injected into an intake pipe by the operation of the purge pump. Whether a negative pressure of the brake booster is insufficient is determined and when the evaporation gas is being injected into the intake pipe and the negative pressure is insufficient, a degree of opening of a valve provided in a line connecting the canister and the purge pump is adjusted.

System and method of securing brake booster negative pressure

An active purge system for a hybrid vehicle may include an active purge unit for compressing evaporation gas generated in a fuel tank and supplying the compressed evaporation gas to an intake pipe. The active purge system may further include a control unit for controlling the active purge unit, wherein the control unit controls an amount of the evaporation gas to be purged according to a state of charge of a battery.

Active purge system for a hybrid vehicle and an active purge method of a hybrid vehicle

An active purge system includes a canister in which a vaporized gas produced in an fuel tank is collected and a purge line that connects the canister to an intake pipe. A purge pump is mounted in the purge line, a purge valve is mounted in the purge line to be positioned between the purge pump and the intake pipe, and a cylinder is connected to the intake pipe. A valve controller changes the operation timing, operation maintenance time, and the operation degree of an intake valve and an exhaust valve disposed at the upper portion of the cylinder. A compression ratio variation device is mounted on a connecting rod and a crankshaft that are connected to a piston to change the top dead center or the bottom dead center of the piston reciprocating in the cylinder.

Growing community of inventors

Gwacheon-si, South Korea

Young-Kyu Oh