CCS Cold-Cranking Simulator for Engine Oil Analysis

CCS Cold-Cranking Simulator for Engine Oil Analysis

Cold-cranking performance of engine oils governs startability under freezing conditions. The CCS Cold-Cranking Simulator by Changsha Friend Experimental Analysis Instrument Co., Ltd. replicates the high-shear, low-temperature viscosity behavior specified in ASTM D5293 and related protocols.

In this instrument, an oil sample (usually 11 mL) is equilibrated to a sub-zero temperature (down to –40 °C) in a temperature-controlled bath. A coated viscometer rotor is immersed and subjected to a constant shear rate (10,000 s⁻¹). The resulting torque is measured via a torsion spring, and dynamic viscosity is calculated.

Design highlights include a Peltier-based refrigeration system for rapid temperature stabilization (±0.2 °C), a low-friction drive motor, and a torque sensor with resolution down to 0.1 µN·m. An integrated touchscreen walks users through sequence steps: chill, rotor insertion, shear measurement, and data capture. Software applies conversion algorithms to report viscosity in mPa·s.

Automotive OEMs and lubricant formulators leverage cold-cranking data to optimize base oil viscosity and additive chemistry for improved low-temperature pumpability. Quality labs verify batch consistency before market release.

To ensure accuracy, samples must be free of air bubbles and pre-filtered. Bath fluid should be changed regularly to maintain thermal conductivity. Rotor and bob surfaces require gentle cleaning to preserve coating integrity. By incorporating cold-cranking simulation, engineers can guarantee reliable engine starts in cold climates.