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JP-2026074572-A - Power unit

JP2026074572AJP 2026074572 AJP2026074572 AJP 2026074572AJP-2026074572-A

Abstract

[Problem] In a power unit equipped with a hydrogen engine, if the throttle of the power unit is opened due to an increase in the load on the power unit, the power unit's rotational speed will recover (increase) quickly. [Solution] A supercharger 3 is provided, which has a turbine motor 32 capable of rotating a turbine 31, and compresses air with the turbine 31 to supercharge the intake system of the hydrogen engine 1. Output devices 21 and 22 are provided, which perform a charging operation to charge a battery 23 with electricity generated by a generator 2, a combining operation to operate the motor 2 with the electricity from the battery 23 so that the power of the hydrogen engine 1 and the power of the motor 2 are combined and output, and a supercharger operation to operate the turbine motor 32 with the electricity from the battery 23. [Selection Diagram] Figure 1

Inventors

  • 岸 真治
  • 白石 健太郎
  • 小山 和晃

Assignees

  • 株式会社クボタ

Dates

Publication Date
20260507
Application Date
20241021

Claims (3)

  1. A hydrogen engine is supplied with hydrogen as fuel, A generator driven by the power of the aforementioned hydrogen engine, Battery and A motor capable of supplying power to the hydrogen engine, The system includes a turbine that is driven to rotate by the exhaust gas supplied from the hydrogen engine, and a turbine motor capable of rotating the turbine, and a supercharger that compresses air with the turbine to supercharge the intake system of the hydrogen engine. A power unit equipped with an output device that performs a charging operation to charge the battery with electricity generated by the generator, a combining operation to operate the motor with the power from the battery so that the power from the hydrogen engine and the power from the motor are combined and output, and a supercharging operation to operate the turbine motor with the power from the battery.
  2. The power unit according to claim 1, wherein the motor and the generator are a motor-generator.
  3. The hydrogen engine is provided with a plurality of cylinders and an intake manifold connected to each of the cylinders. A hydrogen supply device capable of supplying hydrogen to the intake manifold is provided. The air from the supercharger is supplied to the intake manifold. The power unit according to claim 1 or 2, further comprising a throttle capable of adjusting the air supplied to the intake manifold by the supercharger.

Description

This invention relates to a power unit that outputs power to drive generators, pumps, and the like, and to a power unit mounted on a work vehicle that outputs power for driving or for driving work equipment. As an example of such a power unit, as disclosed in Patent Document 1, there is a system that combines an engine with a turbocharger, which has a turbine that is rotated by the supply of exhaust gas from the engine. Such power units are used to drive generators and pumps at a constant rotational speed, to move work vehicles at a constant speed, or to drive work equipment mounted on work vehicles at a constant speed. As a result, if the load on the power unit increases and the rotational speed of the power unit decreases, the rotational speed of the power unit must be restored quickly. Similarly, if the throttle of the power unit is opened to change the rotational speed of a drive such as a generator, the rotational speed of the power unit must be changed quickly. Japanese Patent Publication No. 2021-110323 This diagram shows the overall configuration of the power unit.This diagram shows the operating status of the power unit.This diagram shows the overall configuration of the power unit in a first alternative embodiment of the invention.This figure shows the overall configuration of the power unit in a second alternative embodiment of the invention. (Overall configuration of the power unit) Figures 1 to 4 show a power unit having a hydrogen engine 1 supplied with hydrogen as fuel. In addition to the hydrogen engine 1, the power unit includes a motor generator 2, an E-turbo 3, and a separation device 4, etc. The power from the power unit drives the generator, pumps, etc. (Configuration of hydrogen engine 1) As shown in Figure 1, the hydrogen engine 1 has a crankcase 10, cylinders 11, cylinder head 12, etc., and is configured as an inline four-cylinder type. The crankshaft 13 is rotatably housed in the crankcase 10, and engine oil E1 is stored in the crankcase 10. Four cylinders 11 are provided at the top of the crankcase 10, and connecting rods 15 are connected to the pistons 14 located inside the cylinders 11 and the crankshaft 13. Intake ports 16 and exhaust ports 17, intake valves 18 and exhaust valves 19, and spark plugs 20 are provided in the cylinder head 12, corresponding to each of the cylinders 11. An intake manifold 24 is provided in the cylinder head 12 so as to connect across the four intake ports 16. An exhaust manifold 25 is provided in the cylinder head 12 so as to connect across the four exhaust ports 17. (Configuration related to motor generator 2) As shown in Figure 1, the first inverter 21 is provided with respect to the motor generator 2, and a battery 23 is provided. A motor-generator 2 is installed in the crankcase 10 of the hydrogen engine 1. In the hydrogen engine 1, a flywheel (not shown) is connected to the crankshaft 13, and the transmission gear (not shown) of the motor-generator 2 meshes with the gear portion on the outer circumference of the flywheel. The flywheel is capable of storing rotational energy and releasing the stored rotational energy. When the motor generator 2 operates as a motor, the DC power from the battery 23 is converted to AC power by the first inverter 21 and supplied to the motor generator 2, causing the motor generator 2 to operate as a motor. The power from the motor generator 2 is transmitted to the crankshaft 13 of the hydrogen engine 1 via the flywheel, and the power from the hydrogen engine 1 and the power from the motor generator 2 are combined and output from the crankshaft 13 of the hydrogen engine 1. This state represents the combined operation performed by the first inverter 21. When the motor generator 2 operates as a generator, power from the hydrogen engine 1 is transmitted to the motor generator 2 via the flywheel, driving the motor generator 2. The AC power generated by the motor generator 2 is converted to DC power by the first inverter 21 and charged into the battery 23. The above state represents the state in which the charging operation by the first inverter 21 has been performed. (Configuration of E-Turbo 3) As shown in Figure 1, the E-turbo 3 has a turbine 31 and a turbine motor 32. The turbine 31 has a compressor wheel 31a and a turbine wheel 31b, and the compressor wheel 31a and the turbine wheel 31b are connected so as to rotate together as a single unit. A first air cleaner 33 is provided. An intake passage 34 extends from the first air cleaner 33 and is connected to the compressor wheel 31a of the E-turbo 3. An intake passage 35 extends from the compressor wheel 31a of the E-turbo 3 and is connected to the intake manifold 24 of the hydrogen engine 1. A throttle 36 is provided in the intake passage 35. The exhaust passage 37 extends from the exhaust manifold 25 of the hydrogen engine 1 and is connected to the turbine wheel 31b of the E-turbo 3. The exhaust passage 38 extends from the turbine wheel 31b of the E-turbo 3. The turbi