Hybrid vehicle

Inactive Publication Date: 2011-01-06
SUZUKI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]Accordingly, since motoring control of the engine at a time of regenerative power generation is performed as a function of the state of charge of the battery and since a threshold at the start of motoring control and

Problems solved by technology

Recently, much attention is being paid to hybrid vehicles which are capable of overcoming an inherent disadvantage of electric vehicles in that it is difficult to considerably increase range or travelling distance while at the same time reducing problems arising from exhaust gas and noise inherent to vehicles equipped with an engine.
Heretofore, in a hybrid system including an engine for driving a generator, the generator directly connected to an output shaft of the engine, a battery and a drive motor, a disadvantageous situation arose in that if the amount of charge of the battery reaches the upper limit while electrical power is being regenerated by employing the drive motor as the generator during deceleration while maintaining generating braking power, overcharging of the battery occurs as a result of the amount of charge being increased by the regenerative power.
However, when regeneration is stopped, another disadvantageous situation arises in that the

Method used

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Embodiment Construction

[0022]One embodiment of the present invention will be described in detail hereinafter with reference to the accompanying drawings.

[0023]FIGS. 1 through 5 illustrate one embodiment of the present invention.

[0024]In FIG. 2, reference numeral 1 denotes a hybrid system in a hybrid vehicle consisting of a plug-in hybrid vehicle or a series hybrid vehicle (in a series hybrid vehicle, the engine is not connected to the wheels of the vehicle, it is only used to generate electricity which powers the electric motor and also feeds the battery).

[0025]This hybrid system 1 comprises an engine 2 mounted on the hybrid vehicle, a generator (also referred to as “MG1”) 3 for generating electrical power from the driving force of the engine 2, a battery 4 charged with electrical power generated by the generator 3 and a motor (also referred to as “MG2”) 5 driven by electrical power generated by the generator 3 or by electrical power output from the battery 4.

[0026]That is to say, as shown in FIG. 2, the gen

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Abstract

In a hybrid vehicle including an engine; a generator for generating electrical power from the engine; a battery charged with electrical power generated by the generator; and a motor driven by electrical power generated by the generator or by electrical power output by the battery, and with a view to reducing energy consumption from the battery without using complicated control operations while preventing overcharging of the battery, the hybrid vehicle further includes a motoring control unit for starting motoring, i.e., mechanical driving of the engine, in addition to regenerative power generation when a state of charge of the battery reaches a first set value and stopping the motoring of the engine when the state of charge of the battery reaches a second set value. A battery management unit is also provided for starting power generation from the engine when a state of charge of the battery becomes higher than a third set value and stopping the engine when the state of charge of the battery reaches a fourth set value. Engine motoring control during regeneration and control of power generation by the engine can be separately performed.

Description

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Claims

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Application Information

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Owner SUZUKI MOTOR CO LTD
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