Injector And Cr Pump Control; Injector Control; Cr Pump Control; Delivery & Flow Measurement - Hartridge CRi-PC Operating And Servicing Manual

CRi-PC Operating and Servicing Manual
3.6

Injector and CR Pump Control

3.6.1

Injector control

The injector control electronics is based on the Hartridge™ AE32 All Makes CR Injector Test
box. This incorporates –

A single channel injector drive circuit, suitable for current Bosch, Delphi and Denso
solenoid injectors, and Siemens piezo injectors.

A separate single channel solenoid resistance measurement circuit .

A single channel response time measurement (via response time unit).

An interface with (and control of) the Backleak Flow Measurement Unit (section 3.7).
For further information on injector control see sections 3.1 & 3.2.
3.6.2

CR pump control

The CR pump control electronics is based on the Hartridge™ AE31 All Makes CR Pump Test
box.
The CR pump generates the high pressure in the Common Rail.
The solenoid valves on the pump are controlled to achieve and maintain the required rail
pressure. A pressure transducer mounted on the Hartridge™ pressure dump valve provides
feedback of the rail pressure.
3.7 Delivery & Flow Measurement
3.7.1

Injector delivery

The injector delivery measurement system is based on the Hartridge™ Positive Displacement
Metering Unit and a modified Metering Control Board 4.
3.7.2

Backleak flow

The injector backleak flow measurement system is based on the Hartridge™ HK901 Backleak
Measurement Unit. The unit is controlled by the Injector control board (section 3.6).
A solenoid valve is energised to divert the backleak flow into a measuring tube. The volume of
fluid in the tube is read by a sensor and converted into a flow reading. After measurement the
solenoid valve is de-energised and the tube is drained, all fluid being returned to the main
tank.
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THIS IS AN UNCONTROLLED DOCUMENT downloaded by Lukas Matuska on 16 Feb 2016
Any technical intervention requires certified Hartridge training. Contact Hartridge Ltd for details.
HARTRIDGE LIMITED
HL037 (EN), Issue 13, AT714, 05/14