Injection arrangement for a two-stroke engine

Details Injection arrangement for a two-stroke engine Injection arrangement for a two-stroke engine

1993-05-14

1994-08-16

Argenbright, Tony M.

Internal-combustion engines

Two-cycle

Rear compression

123DIG5, 417364, 417234, F02B 6302, F02M 6902, F02M 3510, F02D 910

Patent

active

053377109

ABSTRACT:
A fuel-injection arrangement and a two-stroke engine define a combination for a portable handheld work apparatus such as a motor-driven chain saw or the like. The combination includes a fuel-feed pump for pumping fuel from a fuel tank and a fuel-injection pump for supplying the fuel for injection into the engine. The fuel-feed pump and the fuel-injection pump are mounted in a con, non injection-pump block separate from the engine. The engine has an intake channel through which combustion air is drawn into the engine and the intake channel is configured so as to open directly into the engine. A throttle flap is pivotally mounted in the intake channel as to be completely separate from the common injection-pump block. The injection pump block is effectively thermally decoupled from the intake channel. The danger of vapor bubble formation because of a heating of the injection pump is thereby reliably avoided. A good decoupling of the injection pump from intensely vibrating engine components can also be provided in this manner.

REFERENCES:
patent: 3698368 (1972-10-01), Yamamoto
patent: 4594971 (1986-06-01), Borst
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patent: 4846119 (1989-06-01), Geyer et al.
patent: 4932370 (1990-06-01), Schierling et al.
patent: 4976246 (1990-12-01), Schierling et al.
patent: 5197417 (1993-03-01), Tuckerman et al.
patent: 5201288 (1993-04-01), Doragrip
patent: 5239967 (1993-08-01), Adam

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