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A control system for a hybrid vehicle has a consumed electric power calculator (20), which calculates electric power consumption, and a battery state calculator (21), which calculates battery state SOC of a battery (5). Based on this battery state, a physical quantity per effective electric power ca

A control system for a hybrid vehicle has a consumed electric power calculator (20), which calculates electric power consumption, and a battery state calculator (21), which calculates battery state SOC of a battery (5). Based on this battery state, a physical quantity per effective electric power calculator (25) calculates a physical quantity per effective power when electric power equal to or greater than consumed electric power is generated for various electric power consumption and electric power generation, and a threshold value calculator (22) obtains a threshold value having the same unit as that of the physical quantity per effective power using predetermined calculation for selecting operating modes of a generator and the battery. An operating mode selector (23) selects operating modes for an engine (1) and the battery (5) based on comparison between the above threshold value and the physical quantity per effective power corresponding to the consumed electric power, and a target generated electric power calculator (24) calculates target electric power generation. An electric power distribution controller (6) controls the engine (1) and the motor (3).

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1. A control system for a hybrid vehicle for controlling the hybrid vehicle comprising a power apparatus consuming fuel and generating power, a battery storing electrical power, and a motor converting electrical power to mechanical power transmitted to a drive wheel of the vehicle, the control syste

1. A control system for a hybrid vehicle for controlling the hybrid vehicle comprising a power apparatus consuming fuel and generating power, a battery storing electrical power, and a motor converting electrical power to mechanical power transmitted to a drive wheel of the vehicle, the control system including a detector detecting an operating condition of the vehicle, and programmed to:calculate a required power indicating a power required to drive the vehicle, based on the operating condition of the vehicle; calculate a first parameter indicating a ratio between a fuel consumption rate and the required power for running the power apparatus so as to generate a power equal to the required power; set a threshold value with respect to the first parameter, based on a charging state of the battery; run the power apparatus so as to generate a power larger than the required power when the first parameter is smaller than the threshold value, and transmit part of the power generated to the drive wheel, and store a remainder of the power generated in the battery; and run the power apparatus so as to generate a power smaller than the required power when the first parameter is larger than the threshold value, and transmit all of the power generated to the drive wheel, and transmit part of a power stored in the battery to the drive wheel.