SU1632380A3 - Automobile head-light - Google Patents

Abstract

A motor vehicle headlamp, of the type capable of creating a main beam, and a dipped beam limited by a cutoff, comprises two axial filaments 11, 12 aligned on the optical axis Ox of the headlamp, and acting as light sources respectively for the main beam and for the dipped beam, a reflector 200 and a closure glass 30. According to the invention, the reflector is divided into two lateral zones 202, 203 and a central zone 201, the lateral zones are paraboloid portions whose foci Fo are situated on the optical axis between the two filaments, the central zone is a zone which reflects the light rays emitted by the filament so that they converge in a region substantially distant from the closure glass, and the central zone and the lateral zones are connected with continuity in two substantially vertical planes situated on either side of the optical axis of the headlamp. Application to attenuating the intensity of the dipped beam at the centre of the glass, and to spreading the beam sideways. <IMAGE>

Description

The invention is ttnositsya to lighting, namely .. car headlights, forming a beam of high and low beam.

The aim of the invention is to reduce the labor intensity of manufacturing the headlamp and improving the technical characteristics.

On fng.1 shows a headlight, a horizontal cut; figure 2 is the same, front view; from fng. Z - headlight, version; FIG. 4 is the same, front view; FIG. 5 shows curves of equal values of the luminous intensity of the formed beam of the headlight shown in FIG. 3, without a gassenoztel; FIG. on

4 Ј „EEMuinZiiizlIrlxinii; + + .y,

4ioo

6 - curves of the rape values of the luminous intensity of a beam of a passing beam. at the level of the lens of the headlight shown in the fng. H, without a corresponding light.

The headlight of an automobile vehicle contains a lamp with a high-beam incandescent body, a low-beam incandescent body 2, a screen 3, a reflector 4 n a diffuser 5. The reflector 4 consists of two parabond elements 6 n 7 n of the central zone 8, which is connected to elements 6 n 7 in vertical planes parallel to the optical axis OX. Central zone 8 at-y. y Ј O corresponds to the equation

  (/ y / -y

4f. 2 mu /

about

GO

to

SЈ

00

about

SI

+ tf (/ y / - y) g

where fA is the focal distance of the parabolic element 7) Oi is the smoothing factor of the surface

OS-TL

y - half-width of the central zone 8;

at 0Јy Ј y | the central zone corresponds to equation (I) with the replacement of the parameters ЈQ, оЈ and y, the parameter si-si

fo yjt which can be equal to the parameters fa, (X, y, where f is the focal distance of the parabond element b.

In another embodiment (FIGS. 3 and 4), the reflector 4 further comprises adjacent zones 9 and 10 connecting the left and right parts of the central zone 8. In this case, zone 9 corresponds to the equation

X

d

t

a1

f + yM, G - T |.). 1MMYE111 E1: GEP B1111-. °% W t) / U / - “y, -, y“ + + cr / y /,

 / U / -Y / -Y / /. :

ri -vvu.

where yt yrnna zone.9;

(the ratio of the zones 9 and 10.

Zone 10 corresponds to 1 equation (2) but with the replacement of the parameters fe, Of, Oft, U,, У.2 by fj.tf,, у, and У4г.

The headlight of the motor vehicle sports track works as follows.

The light beam of the body of the impudent neighbor e &amp; eta, reflecting from aeons 8, 9 and 10 of Hartel 4, forms a light beam, the highest concentration of light flux of which lies outside the dispersant 5 thereby reducing the thermal heat of the ravoviatel 5.

In zones b, 9, and 10, according to equations (1) and (2), it is possible to obtain a smooth poison 4, which

at-0 Ј y Ј y,,

DG fo, f (J - focal lengths

of the corresponding lateral paraboloid elements f Of, Of - the smoothing coefficient, respectively, of the left and

reduces the complexity of his pavilion.

Claims (1)

Claim 1. Automotive vehicle headlight comprising a lamp with two axial filament bodies for a driving beam of a dipped beam with a dimming cup located along the optical axis, a reflector of two side paraboloidal elements: with a focus located on the optical axis, the central zone, and the diffuser, characterized in that, in order to reduce the labor intensity in the manufacture and improve the technical characteristics, this central zone is limited to vertical planes s optical axis and formed in-line with the equations right side of the central zones; width accordingly left and right part central zone; Y / y / IOJ-CJOU or the central zone, made by so-called mk, performed according to the equations indicated above, is equipped with nn m: two dopopnelnye adjacent aeons " f +  t ({Y | URS 52 /, ° "fft in" "") / U / - 91 U, - "," # g) / U / trf-2 -f with / y / L,) (/ y / -y) 2 at –y Ј y Ј 0 { x Г (.J. (/ у /.,;, Ј. (, у /.) / y / jV y Tfc T ° T; t () / y /.  (N-y -t / y / -) 1 .pri 0 у y, I at 0. y where y, y is the width of the left and right adjacent zone, respectively;  respectively, the coupling coefficient 25 The solids are sections of a single paraboloid. H. Farah pop. 1, characterized in that the two lateral paraboloid elements are and the right adjacent zone. parts of two paraboloids with razlich 2. Headlamp according to claim 1, characterized in that two side pairs of FIG. 1. The solids are sections of a single paraboloid. H. Farah pop. 1, characterized in that the two lateral paraboloid elements are portions of two paraboloids with different focal lengths. four-. FIG. 2 AT you i I tf v Editor A.Lezhnina # ". b. I. Annsimov. Tekhred A. Kravchuk Proofreader S. Cherni eight I I " I FIG 4