US 9,283,957 B2 · Hydraulic pressure instruction-learning apparatus for hybrid vehicle and method using the same

Abstract

A hydraulic pressure instruction-learning apparatus of a hybrid vehicle includes a power source including an engine and a motor. The engine clutch is disposed between the engine and the motor. The vehicle controller is configured to output a hydraulic pressure instruction to control engagement/disengagement of the engine clutch. The vehicle controller compares output performance of the engine clutch with predetermined dynamic target performance in a launch control, extracts a performance error function if a difference therebetween exceeds a predetermined allowable error range, and corrects the output performance of the engine clutch, such that the output performance falls within the predetermined allowable error range and is stored as a learned value.

Claims18

Dependent claims

A hydraulic pressure instruction-learning apparatus of a hybrid vehicle, comprising:

a power source including an engine and a motor;
an engine clutch disposed between the engine and the motor;
and
a vehicle controller configured to output a hydraulic pressure instruction to control engagement/disengagement of the engine clutch,
wherein the vehicle controller compares output performance of the engine clutch with predetermined dynamic target performance in a launch control, extracts a performance error function if a difference therebetween exceeds a predetermined allowable error range, and corrects the output performance of the engine clutch such that the output performance falls within the predetermined allowable error range and is stored as a learned value.

2 more elements

A hydraulic pressure instruction-learning method of a hybrid vehicle, comprising steps of:

turning on an engine in an idle state when a launch control condition is satisfied and determining an acceleration of the vehicle with an input amount of an accelerator pedal;
converting by a vehicle controller, the acceleration into a transmission gear ratio to determine a target speed of an input shaft of a transmission, determining a hydraulic pressure instruction for tracking the target speed, and controlling engagement of an engine clutch;
comparing by a vehicle controller, an output speed of the engine clutch with the target speed of the input shaft of the transmission to determine whether or not a performance error exceeds a predetermined allowable error range;
approximating by a vehicle controller, a performance error function by using a quadratic function to divide it into respective components and determining the divided components as compensation points of the hydraulic pressure instruction;
and adjusting by a vehicle controller, the hydraulic pressure instruction according to the respective compensation points to analyze output performance variation of the engine clutch and storing the corresponding hydraulic pressure instruction as a learned value if the output performance of the engine clutch tracks the target speed of the input shaft of the transmission.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/551,954Filed 24 Nov 2014

Priority

KR 10-2014-003229019 Mar 2014

Published

US 2015/0266468 A124 Sep 2015

Granted

15 Mar 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification37 codes

B60W 20/40
Control systems specially adapted for hybrid vehicles: controlling the engagement or disengagement of prime movers, e.g. for transition between…
B60W 10/02
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
B60W 10/06
Including control of propulsion units: including control of combustion engines
B60W 10/08
Including control of propulsion units: including control of electric propulsion units, e.g. motors or generators

Hydraulic pressure instruction-learning apparatus for hybrid vehicle and method using the same

Life of this patent

Hydraulic pressure instruction-learning apparatus for hybrid vehicle and method using the same

Life of this patent

Abstract

Claims18