7.2.1. Check and adjustment of headlights, external lighting, lamp of salon, switch of headlights
Lines of control of 76/756 EWG or ECE-R48 include check and adjustment of headlights of the car. The correct adjustment of headlights of the car should provide the best illumination of the road by a passing beam at the smallest dazzle of counter transport. Thus the inclination of light bunches of headlights to a flat surface and their direction to the vertical longitudinal central plane of the car should correspond to the conditions provided in the line of control.
Dazzle (passing beam) is considered eliminated if intensity of lighting at distance of 25 m from each separate headlight on the plane, vertical in relation to a road cloth, and at height of headlights and above, does not exceed 1 luxury. This requirement is carried out, if adjustment of headlights occurs according to the instruction on adjustment.
On the case of a forward (main) headlight or on fastening there is an adjustment of a passing beam, in the area of control of 76/756 EWG or ECE-R48, indication: 1,0 %.
The indication of 1,0 % corresponds to the adjusting size of a headlight concerning an inclination of a beam of light. So an inclination at distance of 10 m from car headlights составляет10 cm (L0017601 and L0017602). The indicator of an inclination of a headlight of a passing beam the border is considered light darkness.
The instruction on adjustment is explained by drawings.
Used reductions designate:
And – horizontal distance between centers headlights;
In – the central mark;
With – an ispytuyemy surface;
D–the occupied space;
е–the adjusting size in cm;
e= H–h= (adjusting size, forward headlights of 1,0 %, e = 10 cm, fog lights of 2 %, e = 20 cm).
N – height of the middle of a headlight over the occupied area;
H–border height light darkness of a headlight of a passing beam over a surface on which there is a car.
Adjustment of headlights is made by means of the device for adjustment according to instructions, as is shown in drawings.
The basic surface of the measuring device and the car should form an equal surface. Roughness of a surface can make as much as possible ±0,5 mm/m.
I= ±1,0 mm/m.
II = ±0,5 mm/m.
In tires of a vehicle there should be the pressure of air provided by the instruction. The rejected glasses and reflectors of headlights as and the filament lamps covered with a soot should be replaced before adjustment.
Adjustment is carried out at own mass of the car with one person or cargo of 75 kg on sitting of the driver. (Own mass of the car = mass of the car ready for operation with a full fuel tank and mass of all details of the equipment which is taking part in operation of the car, for example, a spare wheel, tools, a jack, the first-aid kit, a precautionary triangle etc.).
In cars with manual adjustment of a road gleam it is necessary establish the ordered main pressure (0,8 bar at own mass of the car).
At manual adjustment of a road gleam it is necessary include ignition and establish a regulator of the block of the switch of light on «0».
The point of intersection of a horizontal and ascending part of border light darkness (a transition point) should be on the perpendicular line which passes through the central mark.
To facilitate calculation of the mentioned point of intersection, it is possible to close alternately several times and again open a headlight half.
Used devices of adjustment of headlights should correspond to existing lines of control and it is necessary to follow the operation manual from the producer.
Regular check of the device of adjustment of headlights should be initiated by a customer service of the producer.
The device of adjustment of headlights is adjusted according to the instruction of the producer and established at an inclination in 1,0 % for a passing beam or 2 % of an inclination for forward fog lights.
According to the instruction of 76/756 EWG of the line 15 ° for a passing beam on the screen of measurement is not present (drawing shows installation for right-hand movement). The direction of adjustment can be executed also by means of devices of adjustment of headlights which show the line 15 ° on the measurement screen.
The middle of a light bunch of a driving beam should settle down in restrictive corners at the central mark (drawing) for headlights with possibility of installation of near and far light.
It is necessary to establish headlights on the screen for adjustment of headlights which corresponds to instructions or by means of the device for adjustment of headlights.
The border at the left should pass light darkness from adjusting a perekrestiya horizontally on the adjusting line.
The border should pass light darkness on the left side horizontally to adjusting a perekrestiya and from here at an angle about 15 ° to the right up. The inclination of a beam of light makes 1,0 % for 10 m.
At first it is necessary to execute height adjustment, then direction adjustment. After adjustment of the direction it is necessary to check height adjustment once again.