DESCRIPTION

The Armfield CM12 is a self-contained diesel engine test rig, which enables students to investigate typical engine performance parameters.

The unit is designed to be linked to a computer and is supplied both with educational data acquisition and control software, as well as the engine manufacturers diagnostic software for monitoring the status of the Engine Control Unit (ECU).

CM12 is a self-contained integrated multi-cylinder engine, dynamometer and instrumentation system. It is based on a 1.9 litre, 4-cylinder automotive diesel engine as used in Volkswagen cars.

The Armfield CM12 can be run on a wide variety of biodiesel fuels and can be used for fuel testing and comparison exercises. (After each run on non-standard fuel, the engine should be run for a short time on a standard diesel fuel approved to EN590).

An eddy current dynamometer provides a variable load on the engine, enabling the characteristic power and torque curves to be reproduced in the laboratory. The system comes complete with extensive instrumentation, including rpm measurement, torque (from which power can be calculated), plus various temperatures, pressures and flows (see Technical Specification).

The whole system is designed to be linked to a computer using the software provided. This provides real time monitoring of the various sensors, with a wide range of data logging and graphical display options.

The dynamometer and throttle can both be controlled electronically from the software, which makes installation into a closed test cell very straightforward and enables remote computer operation.

A safety “watchdog” facility ensures the system shuts down safely in the event of computer failure or software lock-up.

A further advantage of the computer control is that stable rpm readings can be easily achieved using the closed loop control function on the dynamometer drive.

A closed loop primary water-cooling system is incorporated, complete with a heat exchanger for connecting into a secondary cold water supply.

TECHNICAL SPECIFICATIONS

ENGINE DATA

Engine Model: Volkswagen SDI

Displacement: 1896cc

Bore: 79.5 mm

Stroke: 95.5 mm

Cylinders: 4

Nominal Power: 44 kW @ 3600 rpm

Nominal Torque: 130 Nm @ 2200 rpm

DYNAMOMETER DATA

Dynamometer Type: Eddy Current

Cooling: Air cooled

Max Power: 55 kW for 20 minutes

INSTRUMENTATION AND SENSORS

Engine speed counter

Load cell to measure torque

Inlet air flow measured by orifice plate

Inlet air temperature

Secondary cooling water flow and temperatures (inlet and outlet)

The VW diagnostic software can also be used to monitor a wide range of engine functions. In particular the injection characteristics can be used to establish the fuel consumption rate

EPERIMENTAL CONTENT

• Produce a set of performance curves for the engine under varying loads
• To determine the volumetric efficiency of the engine under varying loads
• To measure the pressure inside the cylinder during a complete cycle, and to relate this to the position of the piston, producing a Pressure- Volume diagram. (Requires CM12-12 Engine Indicator Set)
• To measure the fuel consumption of the engine

ขอใบเสนอราคา

ดาวน์โหลดโบว์ชัวร์