KEIO UNIVERSITY
EGR可変機構を用いたHCCI機関の燃焼制御
修士二年 永井 健一郎
Purposes
HCCIエンジンの開発に向けて
目的
課題
3者のガス（量論比予混合気，高温EGRガ
ス，低温EGRガス）の供給比による燃焼位
相（CA50）の制御
高負荷でのノッキングの回避
Fig.2 Control concept
Fig.1 EGR management system
HCCI combustion
Knocking
Misfire
0.44-0.46MPa
0.42-0.44MPa
20
Knocking
-0.38MPa
10
30
40
50
60
70
80
Position of Air Throttle A A [deg]
90
Pre-mixture increase
Fig.3 Driving operation map
SVIMEP
IMEP
Controller (PI)
+
SVCA50
+
-
CA50
Controller (PI)
A
D
Air Throttle A
Cold EGR Throttle D
FFuel
Calculator
( )
PVCA50
Calculator
(Pi , 50 )
14
12
10
8
6
4
2
Set value
CA50
ATDC [deg]
12-14
10-12
8-10
6- 8
4- 6
2- 4
- 2
0.40-0.42MPa
Set value
Engine
40
36
32
28
24
20
16
Air Throttle A
Cold EGR Throttle D
6
5.6
Output
5.2
4.8
Fuel Injector
FAir
4.4
Air Flow
Meter
P( )
Pressure
Sensor
PVIMEP
Fig.4 Block diagram of feedback control
CA50 [ATDCdeg]
0.46-0.48MPa
30
0.5
0.48
0.46
0.44
0.42
0.4
0.38
0
100
200
300
400
4
500
Fuel flow rate [L/m]
0.48-0.50MPa
Misfire
IMEP [MPa]
0.50MPa-
40
0
20
DME/Air
 =1.0
=10.76
Ne =1500rpm
Cam L2.1
A =variable
B =90deg
C =34deg
D =variable
64 cycle ave.
Experiment
Throttle [deg]
Cold EGR Gas increase
Position of Cold EGR Throttle D  D [deg]
Result
50
Cycle number [cycle]
Fig.5 IMEP step change
IMEPの急激な変化に対して燃焼位相（CA50）を制御することでノッキング
を回避した運転が可能となった
2008 IIDA LABORATORY

Tender PDF - Lucknow Zoo

A2506 - ダイセルポリマー

null