Correctly testing a Delphi DP pump is one thing. Correctly timing it — and preserving that timing when the pump leaves the test bench — is another.
This is precisely the problem the ERT45R DP application was developed to solve.
Unlike many other ERT45R applications, the starting point here is not the electronic control of the pump. The DP210, for example, is basically a mechanical pump. What the technician needs is an accurate way to determine the relationship between the pump shaft position and the actual injection event, establish the correct dynamic timing and finally prepare the pump for installation.
That may sound like a measurement problem.
In practice, it is a complete workshop operation.
Dynamic timing starts with two accurate references
To determine the dynamic timing, the system needs to know two things accurately:
Where is the pump shaft?
and
When does the actual injection event occur?
The 81.01.1A01 digital cradle provides the angular reference independently from the test bench, with a resolution of 0.01°.
The 81.01.1035 DP application equipment provides the second reference through a mechanical injector equipped with a lift sensor. The instrumented injector is installed on the reference cylinder indicated by the pump manufacturer's test specifications.
ERT45R can therefore relate the actual injection event to the angular position of the pump.
This allows the technician to measure, verify and establish the required dynamic timing according to the applicable test specifications.
But finding the correct angle is only half the problem.
You have found the timing. Now try to remove the pump without losing it.
This is where the practical problem begins.
Once the correct timing position has been established, the pump shaft must be locked in that position.
On a conventional test-bench coupling arrangement, however, disconnecting the pump normally requires access to the clamping screw of the coupling. Depending on its position, reaching that screw may require rotating the test-bench flywheel.
And while the pump is still mechanically connected to the bench:
rotating the flywheel means rotating the pump shaft.
So you have just spent time accurately establishing the correct timing, locked the pump in the required position...
...and now the conventional removal procedure asks you to move it again.
A timing solution therefore cannot stop at measuring the correct angle.
It must also provide a practical way to preserve that position when the pump is removed.
The mechanical solution is part of the measurement solution
This is why the DP configuration includes a dedicated two-part coupling arrangement.
One half remains connected to the test-bench drive.
The other remains with the pump.
Once the correct timing has been established and the pump shaft locked, the two halves can be separated without rotating the pump shaft. The InjectionPower technical specification explicitly identifies this ability to detach the pump with its shaft locked and without rotation as part of the system design.
But being detachable is not enough.
There can be no angular play
The angular measurement system provides a very precise reference.
That precision would have little value if the mechanical connection between the test bench and the pump introduced angular backlash.
Even a small amount of angular play would make the relationship between the measured shaft position and the actual pump position uncertain.
For this reason, the two-part coupling system is designed to provide a zero-backlash connection during the timing operation.
The electronic measurement and the mechanical transmission therefore solve the same problem together:
Measure accurately → establish the timing → lock the shaft → disconnect without rotation → preserve the timing
The objective is not simply to obtain an accurate number on a display.
The objective is to take the correctly timed pump off the test bench without undoing the work you have just performed.
CPS measurement adds another capability
The same application can address another characteristic of the DP pump: Carriage Position Sensing (CPS).
CPS is not simply another way of expressing the timing angle.
The pump documentation relates carriage position to the torque-trimmer mechanism and maximum fuel delivery, making it a different measurement from dynamic timing.
The 81.01.1541 CPS Sensor Kit adds this measurement capability to ERT45R.
The kit includes the sensor, connection cable and dedicated mechanical adapter. Each CPS sensor is calibrated together with the ERT45R unit with which it will operate to ensure measurement accuracy.
So the technician can work within the same ERT45R environment while dealing with two different requirements:
Dynamic timing
→ When does the injection event occur relative to pump rotation?
CPS measurement
→ What is the carriage displacement under the specified operating condition?
Different measurements. Different purposes. One measurement platform.
And the hardware does not end with the DP application
This is where another important characteristic of the solution becomes visible: modularity.
The angular measurement hardware used to build the DP timing capability is not hardware dedicated exclusively to one pump family.
The same common architecture is used for other ERT45R applications, including Bosch VP29/VR30 and Denso ECD-V3/V4/V5, with the appropriate application-specific extensions.
The principle is therefore different from buying a dedicated device every time another application enters the workshop.
You build a capability.
Then, where technically possible, you reuse what you already have and add what the next application requires.
The ERT45R architecture was designed around exactly this approach: common hardware and application-specific programming/equipment can be combined progressively, with components reused across configurations where applicable.
This is modularity in practical terms.
A solution built around the job, not around the equipment
The Delphi DP application is a useful example because it shows that ERT45R should not be understood simply as an electronic pump controller.
Here the real requirement is different.
The technician needs to:
measure the dynamic timing,
establish the correct position,
lock the pump,
remove it from the test bench without altering that position,
and, when required, measure CPS displacement.
The solution was built around completing that operation.
Electronic measurement alone would not have been enough.
Mechanical accuracy alone would not have been enough.
And an accurate timing measurement that could not be preserved during pump removal would not have solved the technician's problem.
The value is in making the complete operation work.
And because part of the hardware can be reused for other pump families, the capability added today can become part of the foundation for what the workshop needs tomorrow.
One platform. Different applications. Capabilities that build on each other.
How to Time Delphi DP200, DP210 and DP310 Pumps