Hybrid work vehicle
First Claim
1. A hybrid work vehicle comprising:
- an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft;
a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft;
a battery for receiving charging electricity from the motor generator and giving driving electricity to the motor generator;
a load information generation unit for generating load information indicating a rotational load received by the internal combustion engine when in a constant-speed control mode for maintaining a constant number of revolutions of the internal combustion engine, based on an input parameter; and
an assistance calculation unit for calculating an amount of assistance for the internal combustion engine by the motor generator when in the constant-speed control mode, based on the load information.
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Accused Products
Abstract
A hybrid work vehicle is provided with an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft, a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft, and a battery for receiving charging electricity from the motor generator and giving driving electricity to the motor generator. A load information generation unit generates load information indicating a rotational load received by the internal combustion engine when in a constant-speed control mode for maintaining a constant number of revolutions of the internal combustion engine, based on an input parameter, and an assistance calculation unit calculates an amount of assistance for internal combustion engine by the motor generator, based on the load information when in the constant-speed control mode.
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Citations
18 Claims
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1. A hybrid work vehicle comprising:
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an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft; a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft; a battery for receiving charging electricity from the motor generator and giving driving electricity to the motor generator; a load information generation unit for generating load information indicating a rotational load received by the internal combustion engine when in a constant-speed control mode for maintaining a constant number of revolutions of the internal combustion engine, based on an input parameter; and an assistance calculation unit for calculating an amount of assistance for the internal combustion engine by the motor generator when in the constant-speed control mode, based on the load information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hybrid work vehicle comprising:
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an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft; a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft; a battery for receiving charging electricity from the motor generator and giving driving electricity to the motor generator; a load amount calculation unit for calculating a load amount indicating a rotational load received by the internal combustion engine, based on an input parameter; a charging amount calculation unit for calculating a charging amount of the battery; a drive mode selection unit for selecting one drive mode from an assistance drive mode for outputting power to the transmission shaft and a charge drive mode for outputting charging electricity to the battery, based on the load amount and the charging amount; and a motor control unit for controlling drive of the motor generator in a drive mode selected by the drive mode selection unit. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A hybrid work vehicle comprising:
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an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft; a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft; a hydraulic vehicle operation device in which a hydraulic actuator and an electric-hydraulic pump for supplying hydraulic pressure to the hydraulic actuator are incorporated; a battery for receiving charging electricity from the motor generator, giving driving electricity to the motor generator, and supplying electricity to the electric-hydraulic pump; an operation tool for giving an amount of operation with respect to the hydraulic vehicle operation device; an operation amount detection unit for detecting the amount of operation; a pump rotation number calculation unit for calculating a number of pump rotations of the electric-hydraulic pump that is necessary for supplying hydraulic pressure to the hydraulic actuator, using operation information regarding the amount of operation as an input parameter; and a hydraulic pump control unit for outputting a control signal to the electric-hydraulic pump such that the electric-hydraulic pump is driven at the number of pump rotations calculated by the pump rotation number calculation unit. - View Dependent Claims (15, 16, 17, 18)
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Specification