公开(公告)号：US3868939A

公开(公告)日：1975-03-04

申请号：US33757173

申请日：1973-03-02

Applicant: BOSCH GMBH ROBERT

Inventor： FRIESE KARL-HERMANN ,  MICHEL FRIEDBERT ,  KRAUSS RUDOLF ,  JAGGLE GUNTHER ,  STUMPP GERHARD ,  STEINER JOSEF ,  KNAPP HEINRICH

IPC: F02D41/34 ,  F02D3/04 ,  F02M31/125 ,  F02M53/04 ,  F02M53/06 ,  F02N99/00 ,  F02B3/00

CPC classification number: F02M53/06 ,  C09J7/10 ,  F02M53/04 ,  F02M2700/077

Abstract: An improved fuel injection system in an internal combustion engine is described, wherein the system has a discharge outlet for fuel to be injected and brought to a combustion space of the engine, an electrical heating element for heating the fuel directly upstream of the discharge outlet, a fuel entry structure for feeding fuel to the heating element and temperature control structure for controlling the heating by the heating element, at engine temperatures below the optimal operational engine temperature and as a function of engine temperatures influencing the formation of the fuel-air mixture in the combustion space, the fuel being heated to such a degree that the preponderant portion of the amount of fuel to be injected is converted to the gaseous phase not later than immediately after leaving the discharge outlet, and wherein the improvement comprises an internal space in the system, adapted for the flow of fuel therethrough and extending from the fuel entry structure to the discharge outlet, which space is laid out for the smallest fuel volume possible, but in any event has a volume smaller than the volume of fuel injectable during about eight work cycles of the engine while the latter is idling.

Abstract translation: 本发明描述了一种改进的内燃机燃油喷射系统，其特征在于，该系统具有用于喷射燃料的排出口，并将其送至发动机的燃烧空间;电加热元件，用于直接在排出口上游加热燃料; 用于将燃料供给到加热元件的燃料入口结构和用于控制加热元件的加热的温度控制结构，在低于最佳操作发动机温度的发动机温度下，并且作为影响燃料 - 空气混合物形成的发动机温度的函数 燃烧空间，燃料被加热到这样的程度，使得要喷射的燃料量的主要部分不迟于离开排放出口之后立即转化为气相，并且其中改进包括在内部空间 系统，适于燃料流动并从燃料进入结构延伸到排出口 该空间布置在尽可能小的燃料体积上，但在任何情况下，其体积小于在发动机的大约八个工作循环期间可喷射的燃料的体积，而后者处于空转状态。