Fuel Efficiency
Why do HVs have good fuel efficiency?
Q. Why do HVs have good fuel efficiency?
A. A reason for the good fuel efficiency of HVs (THS-II) is the combined advantages of the gasoline engine and electric motor.
The motor features the capability of producing maximum torque when started, allowing for effective acceleration. On the other hand, the engine provides remarkable fuel efficiency during constant speed driving. The HV demonstrates its superior fuel efficiency by fully utilizing characteristics of both the engine and motor.
Furthermore, brakes for conventional vehicles convert kinetic energy to heat energy, which is a waste of energy. HVs convert kinetic energy to electric energy using the motor (MG2). This electric energy can be used for driving the HV, improving the fuel efficiency.
Primary features of HVs which contribute to fuel efficiency
Feature
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Description
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Idling stop
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Stops the engine when the HV is stopped
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Motor assist
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Uses the motor to assist drive power
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EV mode
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Makes motor driving possible at low speeds
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Engine
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Controlled optimally
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Regenerative braking
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Converts energy wasted in braking to electricity
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Electric A/C
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Enables A/C without operating the engine
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