Page 187 - Automotive Engineering Powertrain Chassis System and Vehicle Body

Hybrid vehicle design CHAPTER 7.1

Fig. 7.1-14 Prius systems: (a) THS schematic; (b) power-split device; (c) engine and hybrid transmission; (d) hybrid system in full-throttle
acceleration; (e) lightweight structure detail.

driveability are maintained at all times. The battery pack During ‘full throttle acceleration’ drive mode, (d),
is made up of 40 individual nickel–metal hydride bat- power is also supplied from the battery to augment the
teries and has a relatively small capacity of only 7.5 Ah, drive power supplied by the petrol engine. Such a power
which would not give it much of a range in driving the boost, though adequate for overtaking and short bursts of
vehicle in an all-electric mode. speed, can generally not be maintained for extended

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