# US 2013/0158760 A1 · Control method of hybrid vehicle

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- Number: US 2013/0158760 A1
- Document ID: US20130158760A1
- Status: Published application
- Kind: A1
- Application number: 13/534,777
- Filed: 2012-06-27
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Kia Motors Corporation; Hyundai Motor Company
- Inventors: Sang Joon Kim; Seong Ik Park
- Web page: https://patentgrep.com/patent/US20130158760A1

## CPC

- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- B60K 6/365: with the gears having orbital motion
- B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
- B60K 6/445: Differential gearing distribution type
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 20/10: Controlling the power contribution of each of the prime movers to meet required power demand
- B60W 30/188: Controlling power parameters of the driveline, e.g. determining the required power
- F16H 3/728: {with means to change ratio in the mechanical gearing}
- B60K 2006/381: {characterized by driveline brakes}
- B60L 15/2045: {for optimising the use of energy}
- B60W 2050/0031: {Mathematical model of the vehicle}
- B60W 2710/0644: Engine speed
- B60W 2710/083: Torque
- B60W 2710/105: Output torque
- F16H 2037/101: {Power-split transmissions with one differential at each end of a continuously variable transmission, i.e. CVT}
- F16H 2200/2007: with two sets of orbital gears
- F16H 2200/2041: with four engaging means
- Y02T 10/40: Engine management systems
- Y02T 10/62: Hybrid vehicles
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/72: Electric energy management in electromobility
- 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
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F16H: GEARING
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A control method of a hybrid vehicle that includes engages a second clutch and in response outputs a torque through an output shaft that is connected to the second carrier via torque supplied from an engine and a first and second motor-generators. Accordingly, the speed of the engine is controlled via the first motor-generator, and a torque of an output shaft is control via the second motor-generator. Accordingly, the second motor-generator is used to control an operating point of the engine so that a base motor torque is effectively set.

## Claims

### Claim 1

A control method of a hybrid vehicle that includes a first planetary gear having a first sun gear, a first planetary gear, a first ring gear, and a first carrier, a second planetary gear set having a second sun gear, a second planetary gear, a second ring gear, and a second carrier, an engine connected to the first carrier via a first output shaft, a first motor-generator configured to rotate the first ring gear, a second motor-generator connected to the second sun gear to rotate the second sun gear and the first sun gear, a first brake configured to brake the first ring gear, a second brake configured to brake the second ring gear, a first clutch selectively connecting the first ring gear with the first carrier, and a second clutch selectively connecting the first carrier with the second ring gear, the method comprising:
engaging, by a control unit installed in the vehicle, a second clutch;
outputting torque through a second output shaft that is connected to the second carrier, the torque supplied from the engine and the first and second motor generators;
controlling, by a control unit installed in the vehicle, the speed of the engine by using the first motor-generator; and
controlling, by a control unit installed in the vehicle, the torque of the output shaft by using the second motor-generator.

### Claim 2 (depends on 1)

The control method of a hybrid vehicle of claim 1, wherein the rotation speed of the first motor-generator is controlled so that the engine reaches a predetermined target speed.

### Claim 3 (depends on 2)

The control method of a hybrid vehicle of claim 2, wherein the target speed of the engine is calculated by Formula 2 below:
ω
MG


1
=
1
+
R
1
+
R
2
R
1

ω
ENG
-
1
+
R
2
R
1

ω
out
.
Formula


2

### Claim 4 (depends on 1)

The control method of a hybrid vehicle of claim 1, wherein a torque of the output shaft is calculated by Formula 3 below:
τ
out
=
(
1
+
R
2
)

T
MG


2
-
1
+
R
2
R
1

T
MG


1
.
Formula


3

### Claim 5 (depends on 1)

The control method of a hybrid vehicle of claim 1, wherein a target torque for a speed control of the first motor-generator is calculated by Formulas 4, 5, and 6 below:
τ
MG


1
SpdControl
=
τ
MG


1
F
/
F
+
τ
MG


1
F
/
B
Formula


4
τ
MG


1
F
/
F
=
K
F
/
F
,
ENG
EVT


2

(
-
R
1
1
+
R
1
+
R
2
)

τ
ENG
+
K
F
/
F
,
MG


2
EVT


2

(
-
R
1

R
2
1
+
R
1
+
R
2
)

τ
MG


2
Formula


5
τ
MG


1
F
/
B
=
f
PI
EVT


2

(
ω
MG


1
Target
-
ω
MG


1
)
.
Formula


6

### Claim 6 (depends on 1)

The control method of a hybrid vehicle of claim 1, wherein a target torque for a torque control of the second motor-generator is calculated by a Formula 8 below:
τ
MG


2
Base
=
1
1
+
R
2

τ
out
Demand
+
1
R
1

τ
MG


1
.
Formula


8

### Claim 7

A non-transitory computer readable medium containing program instructions executed by a processor or controller, the computer readable medium comprising:
program instructions that engage a second clutch in a hybrid vehicle power train system to output torque through a second output shaft that is connected to the second carrier, the torque supplied from the engine and the first and second motor generators;
program instructions that control the speed of the engine by using the first motor-generator; and
program instructions that control the torque of the output shaft by using the second motor-generator.

### Claim 8 (depends on 7)

The non-transitory computer readable medium of claim 7, wherein the rotation speed of the first motor-generator is controlled so that the engine reaches a predetermined target speed.

### Claim 9 (depends on 8)

The non-transitory computer readable medium of claim 8, wherein the target speed of the engine is calculated by Formula 2 below:
ω
MG


1
=
1
+
R
1
+
R
2
R
1

ω
ENG
-
1
+
R
2
R
1

ω
out
.
Formula


2

### Claim 10 (depends on 7)

The non-transitory computer readable medium of claim 7, wherein a torque of the output shaft is calculated by Formula 3 below:
τ
out
=
(
1
+
R
2
)

T
MG


2
-
1
+
R
2
R
1

T
MG


1
.
Formula


3

### Claim 11 (depends on 7)

The non-transitory computer readable medium of claim 7, wherein a target torque for a speed control of the first motor-generator is calculated by Formulas 4, 5, and 6 below:
τ
MG


1
SpdControl
=
τ
MG


1
F
/
F
+
τ
MG


1
F
/
B
Formula


4
τ
MG


1
F
/
F
=
K
F
/
F
,
ENG
EVT


2

(
-
R
1
1
+
R
1
+
R
2
)

τ
ENG
+
K
F
/
F
,
MG


2
EVT


2

(
-
R
1

R
2
1
+
R
1
+
R
2
)

τ
MG


2
Formula


5
τ
MG


1
F
/
B
=
f
PI
EVT


2

(
ω
MG


1
Taget
-
ω
MG


1
)
.
Formula


6

### Claim 12 (depends on 7)

The non-transitory computer readable medium of claim 7, wherein a target torque for a torque control of the second motor-generator is calculated by a Formula 8 below:
τ
MG


2
Base
=
1
1
+
R
2

τ
out
Demand
+
1
R
1

τ
MG


1
.
Formula


8

### Claim 13

A non-transitory computer readable medium containing program instructions executed by a processor or controller, the computer readable medium comprising:
program instructions that engage a second clutch in a hybrid vehicle power train system to output torque through a second output shaft that is connected to the second carrier, the torque supplied from the engine and the first and second motor generators;
program instructions that control the speed of the engine by using the first motor-generator wherein a target torque for a speed control of the first motor-generator is calculated by Formulas 4, 5, and 6 below:
τ
MG


1
SpdContrl
=
τ
MG


1
F
/
F
+
τ
MG


1
F
/
B
Formula


4
τ
MG


1
F
/
F
=
K
F
/
F
,
ENG
EVT


2

(
-
R
1
1
+
R
1
+
R
2
)

τ
ENG
+
K
F
/
F
,
MG


2
EVT


2

(
-
R
1

R
2
1
+
R
1
+
R
2
)

τ
MG


2
Formula


5
τ
MG


1
F
/
B
=
f
PI
EVT


2

(
ω
MG


1
Target
-
ω
MG


1
)
;
Formula


6
and
program instructions that control the torque of the output shaft by using the second motor-generator based on Formula 3 below,
τ
out
=
(
1
+
R
2
)

T
MG


2
-
1
+
R
2
R
1

T
MG


1
,
wherein a target torque for a torque control of the second motor-generator is calculated by a Formula 8 below:
τ
MG


2
Base
=
1
1
+
R
2

τ
out
Demand
+
1
R
1

τ
MG


1
.
Formula


8