Supply system

Patent metadata

Field	Value
Publication number	US-12292020-B2
Application number	US-202418596712-A
Country	US
Kind code	B2
Filing date	Mar 6, 2024
Priority date	Mar 16, 2023
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A supply system for supplying ozone to an engine includes an electrolysis part that electrolyzes water to generate hydrogen and oxygen, a first supply part that supplies hydrogen generated by the electrolysis part to an intake pipe of the engine, an ozone generation part that generates ozone from oxygen generated by the electrolysis part, and a second supply part that supplies ozone generated by the ozone generation part to the intake pipe.

First claim

The invention claimed is:

1. A supply system for supplying ozone to an engine, comprising:
an electrolyzer that electrolyzes water to generate hydrogen and oxygen;
a first supplier that supplies the hydrogen generated by the electrolyzer to an intake pipe of the engine;
an ozone generator that generates ozone from the oxygen generated by the electrolyzer; and
a second supplier that supplies the ozone generated by the ozone generator to the intake pipe; and
a processor that executes a supply control program to supply the hydrogen to the intake pipe when an exhaust gas temperature of the engine is lower than a predetermined value, and does not supply the hydrogen to the intake pipe when the exhaust gas temperature of the engine is equal to or higher than the predetermined value,
wherein the predetermined value is a reaction temperature at which at least any of i) nitrogen oxides and unburned fuel and ii) nitrogen oxides and ammonia start to react on a catalyst of a purification device provided in an exhaust pipe of the engine.

2. The supply system according to claim 1 , wherein
the processor further executes the supply control program to supply the ozone to the intake pipe when the exhaust gas temperature of the engine is lower than the predetermined value, and does not supply the ozone to the intake pipe when the exhaust gas temperature of the engine is equal to or higher than the predetermined value.

3. The supply system according to claim 1 , wherein
when the exhaust gas temperature is equal to or higher than the predetermined value, the processor further executes the supply control program to close a control valve provided in a pipe line connecting the electrolyzer and the intake pipe, and stores the hydrogen in a hydrogen tank provided between the electrolyzer and the control valve.

4. The supply system according to claim 1 , wherein
the processor further executes the a-supply control program to open a control valve provided in a pipe line connecting the electrolyzer and the intake pipe to supply the hydrogen stored in a hydrogen tank provided between the electrolyzer and the control valve to the intake pipe.

5. The supply system according to claim 4 , wherein
the processor further executes the supply control program to adjust an opening degree of the control valve to supply an amount of the hydrogen proportional to a requested torque of the engine from the hydrogen tank to the intake pipe.

6. The supply system according to claim 1 , wherein
the ozone generator converts the oxygen into the ozone by irradiating the oxygen passing through the ozone generator with ultraviolet light.

7. The supply system according to claim 6 , wherein
the ozone generator generates the ultraviolet light by turning on an ultraviolet lamp or discharging between electrodes in the ozone generator, and irradiates the oxygen passing through the ozone generator with the ultraviolet light.

Assignees

• Isuzu Motors Ltd

Inventors

• Okamoto Takeshi

Classifications

• F02D19/0671

  Means to generate or modify a fuel, e.g. reformers, electrolytic cells or membranes · CPC title

• F02M23/006

  Valves specially shaped for supplying secondary air · CPC title

• F02M2700/123

  Fuel supply devices · CPC title

• F02D35/0046

  Controlling fuel supply · CPC title

• F02D19/0644

  the gaseous fuel being hydrogen, ammonia or carbon monoxide · CPC title