Hybrid vehicle

Abstract

A Rankine cycle system (9) for recovering a heat energy of an exhaust gas is mounted on a hybrid vehicle including an internal combustion engine (1) as a drive source for traveling of the vehicle and an electric generator motor (2). An output from the Rankine cycle system (9) is input to a transmission (4) and used to assist in a driving force from the internal combustion engine (1), or converted into an electric power and used to charge a battery (8). During acceleration and cruising of the vehicle, the heat energy of the exhaust gas is recovered by the Rankine cycle system (9), and during deceleration of the vehicle, a kinetic energy of a vehicle body is recovered as a regenerative electric power for the electric generator motor (2), thereby reducing the amount of fuel consumed in the internal combustion engine (1). Thus, even when the vehicle is in any operational state, the energy recovery efficiency can be enhanced to the maximum to reduce the amount of fuel consumed in the internal combustion engine.

Description

technical field [0001] The invention relates to a hybrid vehicle with an internal combustion engine, a generator-electric unit and a steam cycle. Background technique [0002] It is known from Japanese Patent Application Publication No. 5-340241 and Japanese Patent Application Publication No. 56-101012 that in a steam cycle (Rankine cycle: Rankine cycle) device, the exhaust heat energy of the internal combustion engine is converted into mechanical energy, and the mechanical energy is used to assist The driving force of a vehicle, or drives a generator to obtain electricity. [0003] In addition, it is known that there is an internal combustion engine and a generator motor unit, when accelerating and cruising, the driving force of the generator motor unit is used to assist the driving force of the internal combustion engine, and when decelerating, the regenerative power of the generator motor unit is used to charge the battery. hybrid vehicles. [0004] However, when the st...

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Problems solved by technology

[0004] However, when the steam cycle device is mounted on the vehicle, although the exhaust heat energy of the internal combustion engine can be recovered when the vehicle is accelerating and the vehicle is cruising, there is a problem in the steam cycle device that the kinetic energy of the vehicle body cannot be recovered when the vehicle decelerates. this question

In addition, in a hybrid vehicle, although the kinetic energy of the vehicle body can be recovered as the regenerative power of the generator-motor unit when the vehicle is decelerating, there is a problem that the exhaust heat energy of the internal combustion engine cannot be recovered when the vehicle is accelerating or cruising.

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