Page 270 - 05. Subyek Teknik Mesin - Automobile Mechanical and Electrical Systems Automotive Technology Vehicle Maintenance and Repair (Vehicle Maintenance Repr Nv2) by Tom Denton

2
254 Automobile mechanical and electrical systems

Figure 2.345 High-voltage cables are always orange

Parallel hybrid Series hybrid Power split

Transmission Electric motor/generator
Engine Transmission Transmission

Electric
motor
Electric motor
Generator Generator
Plantary gear
Battery Fuel Engine
Engine
Battery

Fuel Battery Fuel

Figure 2.346 Three types of hybrid vehicle

which in turn powers a motor. The motor propels the vehicle. With a parallel
Key fact
system, the engine and motor can both be used to propel the vehicle. Most
The IMA system is a parallel hybrid hybrids in current use employ a parallel system known as integrated motor assist
system. (IMA). The power split has additional advantages but is also more complex.

The IMA method is a technologically advanced parallel hybrid power system. By
using techniques such as brake-energy regeneration to maximize the effi ciency
with which energy is used, it combines low-pollution, low-cost operation with
high levels of safety and running performance. The main components of the
system are:
IMA motor
●
battery module
●
power drive unit (PDU)
●
motor control module (MCM)
●
d.c. – d.c. converter.
●
There are fi ve main IMA operating modes. Figures 2.347 and 2.348 give an
overview of each mode and Table 2.4 explains these modes in more detail.