# US 9,518,543 B2 · Fuel supply system and fuel supply method for internal combustion engine

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,518,543 B2
- Document ID: US9518543B2
- Status: Granted
- Kind: B2
- Application number: 14/123,391
- Filed: 2012-05-31
- Published: 2014-05-01
- Granted: 2016-12-13
- Earliest claimed: 2011-06-07
- Assignees: Toyota Jidosha Kabushiki Kaisha; Nippon Soken, Inc.; Aisan Kogyo Kabushiki Kaisha
- Applicants: Hideaki Kosuge; Susumu Kojima; Rio Shimizu; Tomojiro Sugimoto; Masayuki Akita; Jin Tanaka; Makoto Nakagawa; Masaki Ikeya
- Inventors: Hideaki Kosuge; Susumu Kojima; Rio Shimizu; Tomojiro Sugimoto; Masayuki Akita; Jin Tanaka; Makoto Nakagawa; Masaki Ikeya
- Web page: https://patentgrep.com/patent/US9518543B2

## CPC

- F02M 53/02: with fuel-heating means, e.g. for vaporising
- F02D 19/02: peculiar to engines working with gaseous fuels
- F02D 19/022: {to adjust the fuel pressure, temperature or composition}
- F02D 41/0027: {the fuel being gaseous (non-electrical control F02D19/02)}
- F02M 21/0212: {comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane}
- F02M 21/06: Apparatus for de-liquefying, e.g. by heating
- Y02T 10/30: Use of alternative fuels, e.g. biofuels
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A fuel supply system for an internal combustion engine includes a heat exchanger that has a heat exchanging wall between a liquefied fuel passage and an engine coolant passage. Heated and vaporized fuel flowing out from the liquefied fuel passage of the heat exchanger is supplied to the internal combustion engine. A flow rate of liquefied fuel supplied to the liquefied fuel passage of the heat exchanger is set. A flow rate of engine coolant supplied to the engine coolant passage of the heat exchanger is determined on the basis of a temperature of the engine coolant supplied to the engine coolant passage of the heat exchanger such that nucleate boiling or transition boiling of the liquefied fuel in the set flow rate occurs near a boundary between nucleate boiling and transition boiling in the liquefied fuel passage.

## Claims

### Claim 1

A fuel supply method for an internal combustion engine, which supplies heated and vaporized fuel to the internal combustion engine, comprising:
providing a heat exchanger that has a heat exchanging wall between a liquefied fuel passage and an engine coolant passage, wherein the heated and vaporized fuel flows out from the liquefied fuel passage of the heat exchanger;
setting a flow rate of liquefied fuel supplied to the liquefied fuel passage of the heat exchanger, and
determining a flow rate of engine coolant supplied to the engine coolant passage of the heat exchanger on the basis of a temperature of the engine coolant supplied to the engine coolant passage of the heat exchanger such that nucleate boiling or transition boiling of the liquefied fuel in a set flow rate occurs near a boundary between nucleate boiling and transition boiling in the liquefied fuel passage.