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EP0057407A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Magnetic fuel injection valve

Assignee: Hitachi Ltd
•
Filing: 1982-01-26
•
Granted: —
•
Expires: 2002-01-26
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Abstract

Abstract A fuel inlet (36) opens at one end between the valve seat (14) and the inner surface of the valve housing (12) on which the globe valve (10) slides. The other end of the fuel inlet (36) opens to the external surface of the valve housing (12). The fuel inlet (36) runs almost in the direction of the central axis of the globe valve (10) so as to prevent the formation of vortex flow around the globe valve (10). Inside the valve housing (12) immedi. ately downstream of the valve seat (14) is fitted under pressure a spiral member (40) which is a rod with a spiral fuel groove (38) to swirl the fuel along the groove. Ano αtlet orifice (42) for fuel metering is formed immediately downstream of and as close as possible to the spiral member (40). In an other embodiment of the invention the valve housting (12) is surrounded by a housing (43) with fuel inlets (36'). This housing (43) is fightly connected to the downstream-end of the valve housing (12) having tangential bores (44) for assisting air-inlet joining with a conical space (45) and blowing the assisting air towards the axis of the outlet orifice (42).

Inventors

  • 👤 Masakichi Momono
  • 👤 Masanori Moriya
  • 👤 Masahiro Souma
  • 👤 Eiji Hamashima

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 02:37
CPC Classifications
F; F02; F02M; F02M51/00; F02M61/00; F02M61/16; F02M61/162; F02M61/163; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02M51/08; F02M69/00; F02M69/04; F02M69/047; F02M69/08; F02M2200/00; F02M2200/50; F02M2200/507; Y; Y10; Y10S; Y10S239/00; Y10S239/90

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 204 words
In a magnetic fuel injection valve including a coil (32) a core (30) provided at the center of the coil (32); a yoke (26) formed around the coil (32) and connected with the core (30) ; a plunger (20) facing one end of the core (30) and slidable along the central axis of the yoke (26); a globe valve (lo) formed at the other end of the plunder (20) on the opposite side to the core (30); a valve housing (12) connected to the yoke (26), with the globe valve (lo) adapted to slide inside the valve housing (12), and a valve seat (14) facing the globe valve (lo), the improvement further comprises a fuel inlet passage (36) communicating the outer surface of the valve housing (12) with the immediate upstream of the valve seat (14) inside the valve housinq (12), the fuel inlet passaqe (36) being formed so that the fuel is not swirled at the upstream of the valve seat (14); a means provided downstream of the valve seat (14) to give to the outgoing fuel a spiraling movement in the direction perpendicular to the direction of injection; and a fuel metering orifice (42) provided downstream of the spiral member (40) .
Claim 2
Dependent Claim 204 words
In a magnetic fuel injection valve including a coil (32) a core (30) provided at the center of the coil (32); a yoke (26) formed around the coil (32) and connected with the core (30) ; a plunger (20) facing one end of the core (30) and slidable along the central axis of the yoke (26); a globe valve (lo) formed at the other end of the plunder (20) on the opposite side to the core (30); a valve housing (12) connected to the yoke (26), with the globe valve (lo) adapted to slide inside the valve housing (12), and a valve seat (14) facing the globe valve (lo), the improvement further comprises a fuel inlet passage (36) communicating the outer surface of the valve housing (12) with the immediate upstream of the valve seat (14) inside the valve housinq (12), the fuel inlet passaqe (36) being formed so that the fuel is not swirled at the upstream of the valve seat (14); a means provided downstream of the valve seat (14) to give to the outgoing fuel a spiraling movement in the direction perpendicular to the direction of injection; and a fuel metering orifice (42) provided downstream of the spiral member (40) .
Claim 3
Dependent Claim 85 words
A magnetic fuel injection valve as set forth in claim 1, wherein the inner diameter of the valve housinq (12) and the outer diameter of the globe valve (lo) are set almost equal so that the globe valve (lo) can be guided in the valve housing (12) and the inner opening of the fuel inlet passage (36) is formed between the valve seat (14) and the narrowest portion of the gap between the globe valve (10) and the inner surface of the valve housing (12).
Claim 4
Dependent Claim 32 words
A magnetic fuel injection valve as set forth in claim 1 and claim 2, wherein the spiral member (40) is a rod circular in cross section with a spiral fuel groove (38).
Claim 5
Dependent Claim 65 words
A magnetic fuel injection valve as set forth in claim 1, wherein the valve housing (12) is surrounded by a housing (43) having fuel inlets (36') and being fightly connected to the downstream-end of the valve housing (12), having tangential bores (44) for assisting air inlet, joining with a conical space (45) and blowing the assisting air towards the axis of the outlet orifice (42).
Claim 6
Dependent Claim 43 words
A magnetic fuel injection valve as set forth in claim 4, wherein the tangential bores (44) are arranged in such a manner that the direction of the air swirl is opposite to the direction of the grooves (38) of the spiral member (40).

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