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US 9,038,601 B2Granted
Flow limiter assembly for a fuel system of an internal combustion engine
AssigneeCummins Inc.
InventorsCorydon E. Morris, David L. Buchanan
Life of this patent
Estimating the term…
Abstract
A flow limiter for a fuel system is provided. The flow limiter includes a self-contained portion that enables testing of the flow limiter prior to assembly into a fuel system. A housing of the flow limiter is arranged to provide reduced or no pressure differential across a wall of the housing, permitting the housing to be reduced in size and thickness and providing improved consistency of operation.
Claims21
A fuel flow limiter assembly for a high-pressure fuel system, comprising:
- an outer housing containing a housing bore to receive high-pressure fuel and an inner wall forming the housing bore;
- a flow limiter housing including a longitudinal axis, a first portion, a second portion positioned in the housing bore upstream from the first portion, and a fuel flow passage extending through the second portion to receive high-pressure fuel, the second portion including an outer surface positioned a spaced radial distance from the inner wall to form a gap fluidly connected to the housing bore to receive high-pressure fuel;
- and
- a flow limiter plunger mounted in the fuel flow passage for reciprocal movement between a first position permitting fuel flow through the fuel flow passage and a second position blocking flow through the fuel flow passage.
1 more element
A fuel injector for a high-pressure fuel system, comprising:
- an injector body including a longitudinal axis, a high-pressure fuel circuit and an end surface extending transverse to the longitudinal axis;
- an outer housing mounted on the injector body and including a housing bore to receive high-pressure fuel and a transverse face extending transverse to the longitudinal axis;
- a flow limiter housing including an extension portion positioned in the housing bore, a fuel flow passage extending through the extension portion to receive high-pressure fuel for delivery to the high-pressure fuel circuit, and a flange portion positioned axially between, and in compressive abutment against, the transverse face and the end surface to securely position the extension portion in the housing bore;
- and
- a flow limiter plunger mounted in the fuel flow passage for reciprocal movement between a first position permitting fuel flow through the fuel flow passage and a second position blocking flow through the fuel flow passage.
2 more elements
A fuel flow limiter assembly for a high-pressure fuel system, comprising:
- an outer housing containing a housing bore to receive high-pressure fuel and an inner wall forming the housing bore;
- a flow limiter housing including a longitudinal axis, a first portion, a second portion positioned in the housing bore upstream from the first portion, and a fuel flow passage extending through the second portion to receive high-pressure fuel, the second portion including an outer surface positioned a spaced radial distance from the inner wall to form a gap fluidly connected to the housing bore to receive high-pressure fuel;
- and
- a flow limiter plunger mounted in the fuel flow passage for reciprocal movement between a first position permitting fuel flow through the fuel flow passage and a second position blocking flow through the fuel flow passage, wherein the gap extends axially along the longitudinal axis an entire length of the flow limiter plunger.
1 more element
Dependencies are inferred from the claim text.