# US 10,480,467 B2 · Flow limiting valve, in particular for a dual fuel injection system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,467 B2 - Document ID: US10480467B2 - Status: Granted - Kind: B2 - Application number: 15/292,827 - Filed: 2016-10-13 - Published: 2017-02-02 - Granted: 2019-11-19 - Earliest claimed: 2014-04-16 - Assignees: L'Orange GmbH - Applicants: L'Orange GmbH - Inventors: Markus Kalenborn - Web page: https://patentgrep.com/patent/US10480467B2 ## CPC - F02M 43/04: Injectors peculiar thereto - F02D 19/0681: {Shut-off valves; Check valves; Safety valves; Pressure relief valves} - F02D 19/0684: {High pressure fuel injection systems; Details on pumps, rails or the arrangement of valves in the fuel supply and return systems} - F02M 21/0239: {Pressure or flow regulators therefor} - F02M 43/00: Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive - F02M 63/0215: {by draining or closing fuel conduits} - F02M 63/0225: {Fuel-injection apparatus having a common rail feeding several injectors (F02M63/0003 takes precedence); Means for varying pressure in common rails; Pumps feeding common rails} - 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 flow limiting valve, comprising a valve body adjustable between a closed position and an open position, wherein in the open position a flow channel for a conveying fluid is opened in the flow limiting valve and in the closed position the flow channel is closed, whereby the adjustment of the valve body is subject to conveying fluid pressure; wherein a control valve is integrated into a housing of the flow limiting valve through which the valve body is adjustable between open and closed positions, regardless of the conveying fluid. ## Claims ### Claim 1 A flow control valve for a dual injection system, the flow control valve comprising: a housing; a valve body adjustable between a closed position and an open position, wherein in the open position a flow channel for a burnable gas is opened in the flow control valve and in the closed position the flow channel is closed, whereby the movement of the valve body is subject to pressure of a liquid fuel used as a control fluid or in the absence of the liquid fuel used as the control fluid; and a control valve integrated into the housing of the flow control valve through which the valve body is moveable between open and closed positions, regardless of the burnable gas. ### Claim 2 (depends on 1) A flow control valve according to claim 1, wherein the flow control valve is used in a dual-fuel injection system. ### Claim 3 (depends on 1) A flow control valve according to claim 1, wherein a control element of the control valve operates the valve body and is adjustable by a control fluid. ### Claim 4 (depends on 3) A flow control valve according to claim 3, wherein the control element is an adjusting piston and is located within a piston housing supplied with the control fluid. ### Claim 5 (depends on 3) A flow control valve according to claim 3, wherein end faces of the control element or of a component connected with the control element are supplied by the control fluid at different pressures. ### Claim 6 (depends on 5) A flow control valve according to claim 5, wherein a throttle is integrated into a control line for conveying the control fluid from a high pressure control fluid source to the control element or to components connected with the control element. ### Claim 7 (depends on 6) A flow control valve according to claim 6, wherein opposite end faces of the control element or of components connected with the control element are supplied with the control fluid upstream and downstream of the throttle. ### Claim 8 (depends on 3) A flow control valve according to claim 3, wherein the valve body and the control element of the control valve are arranged coaxially. ### Claim 9 (depends on 3) A flow control valve according to claim 3, wherein the control element of the control valve is force-actuated by a spring element into the open position. ### Claim 10 (depends on 3) A flow control valve according to claim 3, wherein the control fluid is a liquid fuel. ### Claim 11 (depends on 1) A flow control valve according to claim 1, wherein the valve body is force-actuated into the open position by a spring element. ### Claim 12 A dual injection system, comprising: a flow limiting valve, including: a gas chamber in fluid connection with a connecting element configured to receive a burnable gas as a conveying fluid; an outlet channel; a control valve integrated into a housing, the control including: a valve body adjustable between a closed position and an open position, the adjustment operable by pressure of liquid fuel used as a control fluid or in the absence of the liquid fuel used as the control fluid; and a flow channel in the valve body for passage of the conveying fluid, the flow channel being opened between the gas chamber and the outlet channel in the open position and closed in the closed position; a burnable gas injector unit configured to control a flow of burnable gas; and a liquid fuel injector unit configured to control a flow of liquid fuel. ### Claim 13 (depends on 12) The dual injection system according to claim 12, wherein the flow limiting valve is allocated to the burnable gas injector unit. ### Claim 14 (depends on 12) The dual injection system according to claim 12, further comprising an adjustable pilot valve located in a control line connected with the liquid fuel injector unit, wherein the control fluid is operable to be supplied to the flow limiting valve downstream from the pilot valve. ### Claim 15 A method of operating a dual-injection system, comprising: providing a flow limiting valve, including: a gas chamber in fluid connection with a connecting element configured to receive a conveying fluid; an outlet channel; a control valve integrated into a housing, the control valve including: a valve body adjustable between a closed position and an open position, the adjustment operable by pressure of a conveying fluid or in the absence of the conveying fluid; and a flow channel in the valve body for passage of the conveying fluid, the flow channel being opened between the gas chamber and the outlet channel in the open position and closed in the closed position; a burnable gas injector unit configured to control a flow of burnable gas; and a liquid fuel injector unit configured to control a flow of liquid fuel; providing a liquid fuel used as a control fluid; and adjusting the control valve with pressure of the control fluid.