Environmental Engineering Reference
In-Depth Information
9.5
Japan 10-15 mode
The Japan 10-15 mode is representative of congested urban driving typical of
Japan and other Asia-Pacific cities. Traffic flow is uneven with very frequent stop-
go events and long idle times. The preponderance of idle time has prompted the
Japanese government to require engine-off during stops, and it is the reason why
idle-stop ISG technologies and full hybrids are so popular. The Toyota Crown, for
example, is the first implementation of a 42 V belt driven ISG to reach the market
(i.e. only for city government use at this point).
Figure 9.13 is a chart showing the vehicle speed versus time. Japan 10-15
mode is a low speed cycle having top speed of 77 kph and an average speed of only
22.7 kph.
Japan 10-15 emission and fuel economy driving schedule
Length = 892 s, distance = 3.94 mi, average speed = 15.97 mph
90
80
70
60
50
40
30
20
10
0
0
100
200
300
400
500
600
700
800
900
1,000
Test time (s)
Figure 9.13 Japan 10-15 mode
Japanese 10
-
15 exhaust emission and fuel economy driving schedule
Length = 892 s, distance = 6.34 km, average speed = 25.61 kph
(Preceded by 15 min warm-up at 60 kph, idle test, 5 min warm-up at 60 kph)
120
No emission sample
collected
Emission sample
collected in bag
100
80
60
Idle 10 mode
10 mode
10 mode
15 mode
40
15 mode
20
0
Test time (s)
Figure 9.14 Japan 10-15 mode (courtesy Automotive Testing Laboratories,
Inc. [9])
