Engine working machine

摘要

An engine working machine that has an electronically controlled fuel injection system and a fuel tank disposed in an upper portion. The capacity of the fuel tank is effectively used and a complex structure is prevented while reducing the length of the fuel piping. An engine is disposed in a lower portion, and a fuel tank is disposed above the engine. A fuel pump is mounted on a bottom outside surface of the fuel tank, and disposed projecting on a side portion of the crankcase. An extended box is provided on a bottom surface of the fuel tank, and the fuel pump is mounted with a filter and a fuel intake port located inside the extended box. The fuel pump is housed in a pump case that is fixed to a bottom surface of the extended box.

主权项

1. An engine working machine including an electronically controlled fuel injection system for which an engine and a working machine are disposed in a lower portion, and a fuel tank is disposed above the engine and the working machine, the engine working machine comprising a fuel pump mounted on a bottom surface of the fuel tank from outside,
wherein the pump case has an external form of a cylinder body on which a flange is provided, an inner cylinder body is further provided at an inside of the cylinder body, the inner cylinder body holds the fuel pump, the flange is bolted to a bottom surface of the fuel tank or the extended portion with sealing means interposed, the inner cylinder body is communicated at its upside with a fuel tank and is sealed by a cap at its downside, and a discharge port of the fuel pump held by the inner cylinder body projects into a buffer space formed between the inner cylinder body and the cap.