Fuel injection nozzle for two-stage fuel injection

Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger

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2395338, 2395339, F02M 4702

Patent

active

049345990

ABSTRACT:
A fuel injection nozzle comprising a needle valve which is lifted away from a valve seat against the spring force of a pressure spring by receiving pressure from the fuel to be injected. The lift of the needle valve thus causes the fuel to be injected into a combustion chamber of an internal combustion engine. The lift of the needle valve takes place in two stages, in particular by reducing the amount of initial fuel injection, to reduce engine knock. This is accomplished by the provision of a movable, cylindrical plunger which abuts the needle valve at a certain lift thereof and restricts further lift of the needle valve by being subjected to the pressure from the fuel to be injected. Thus, the increase in the rate of fuel injection is restricted to an optimum level.

REFERENCES:
patent: 2898051 (1959-08-01), Teichert
patent: 2927737 (1960-03-01), Zeuch et al.
patent: 3006556 (1961-10-01), Shade et al.
patent: 4215821 (1980-08-01), Eblen
patent: 4269360 (1981-05-01), Kopse
patent: 4403740 (1983-09-01), Eblen et al.
patent: 4499871 (1985-02-01), Neitz et al.
patent: 4528951 (1985-07-01), Yamada
patent: 4669668 (1987-06-01), Ogawa

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