System Description; General Description Of The Area Of Use; Method Of Operation Of The Controller - Burkert 1094 Standard Operating Instructions Manual

Electronic controller for vapor recovery

Hide thumbs Also See for 1094 Standard:

Table of Contents

Available languages

2 SYSTEM DESCRIPTION

2.1 General description ot the area of use

When refuelling a vehicle, the petrol flowing into the fuel tank displaces an equal

volume of petrol vapour out of the tank. In order to prevent this petrol vapour from

escaping into the atmosphere, it must be sucked away.

In the solution offered by Bürkert, this suction process takes place by means of

underpressure via a proportional valve mounted in front of the reservoir tank of the

fuel pump. A suction pump transports the petrol vapour out of the vehicle tank and

presses it into the reservoir tank of the petrol pump.

To avoid excessive pressure in the reservoir tank, the volumetric pressure between the

petrol being delivered and the returned petrol vapour must be balanced.

The amount of petrol filled into the vehicle tank is measured using a calibrated piston

meter in the petrol pump, is converted into pulsed signals by the petrol pump compu-

ter and is reported to the controller.

The controller shown on Figure 1 evaluates the pulsed signals from the petrol pump

computer and, by means of electrical PWM control signals, controls the area of flow

of a control valve (explosion-protected proportional valve of Type 2832) and thereby

the flow rate of the returned petrol vapour.

Figure 1: Electronic controller Type 1094 Standard

1094 - 5

Table of Contents

Table of Contents