IMA System

The IMA system is shared with the Insight hybrid, but the software and settings have been altered to interact with the 3-Mode Drive System and manual transmission. Although the operating revs are quite different in a manual car, the flexibility of Honda's IMA parallel hybrid system makes integration of different engines and transmissions more straightforward.

Extensive testing was done to ensure that the impressive durability of the Insight's IMA hardware was not compromised in any way by the addition of a manual gearbox. Particular attention was paid to the possibility of over-revving the engine due to missed gear changes and the implications this might have for the system

The electric motor provides its peak torque instantly from the start, boosting the low end torque of the Honda CR-Z by more than 70 Nm, improving initial acceleration. The torque curve of the new hybrid is unusually flat for a naturally aspirated engine, with the peak arriving at just 1500 rpm, enabling great flexibility at all engine speeds.

The battery pack in the Honda CR-Z is a 100.8 volt Nickel Metal Hydride unit which provides an excellent balance between output, reliability, safety and cost. As with the rest of the system, the battery pack is shared with the incredibly reliable Insight model, which has proved itself to have the lowest warranty claim rate of any Honda car sold in Europe during 2009. At the end of the vehicle life, the battery pack can be recycled through Honda dealers.

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