Engine Performance Optimization
For stable onboard power generation and minimized operational costs
Four stroke Auxiliary Engine
Executive Summary
​
Reliable and efficient auxiliary engine operation is critical for ensuring stable onboard power generation and minimizing operational costs.
Over time, medium-speed engines such as the MAN 32/40 series may experience deviations in combustion performance due to fuel injection timing variations, component wear, injector condition, or air system imbalances. These deviations often lead to uneven cylinder loading, increased fuel consumption, elevated exhaust temperatures, and accelerated component wear.
Green Shift Group offers specialized engine performance optimization services utilizing advanced electronic indicator scope technology to analyze real-time combustion parameters and restore optimal engine performance.
Through a combination of cylinder pressure measurement, combustion analysis, and fuel injection timing optimization, our engineers ensure balanced cylinder performance and optimal combustion efficiency across the entire engine.
-
The service delivers measurable operational improvements including:
-
Reduced fuel consumption
-
Balanced cylinder load distribution
-
Lower exhaust temperature spread
-
Reduced mechanical stress on engine components
-
Improved operational reliability and extended service intervals
All findings and adjustments are documented in a comprehensive engine performance analysis report provided upon completion of the service.
Service Overview
Green Shift Group provides on-site diagnostic and optimization services for MAN 32/40 auxiliary engines, utilizing electronic indicator scope technology to measure combustion performance and optimize engine timing.
The service focuses on restoring correct fuel injection timing, combustion pressure distribution, and cylinder load balance, ensuring that each cylinder contributes evenly to the total engine output.
This process significantly improves overall engine efficiency and operational stability.
Typical performance improvements include:
-
1–3% reduction in fuel consumption.
-
Reduced exhaust temperature imbalance between cylinders.
-
Improved turbocharger performance.
-
Reduced risk of piston, liner, and valve damage.
-
Improved generator stability and load response.
Scope of the work
A) Preparation and Technical Assessment.
​
Prior to conducting the measurements Green Shift Group engineer will carry out a technical review and preparation phase, including:
​
-
Review of engine operational data and recent maintenance records.
-
Verification of engine operating conditions and load stability.
-
Inspection of indicator valves and installation points.
-
Calibration and preparation of electronic indicator equipment.
This ensures accurate measurement conditions and reliable diagnostic results.
B) Cylinder Pressure Measurement
​
Electronic indicator measurements will be performed on all cylinders while the engine is operating under stable-load conditions.
The following parameters will be recorded:
​
-
Maximum cylinder pressure (Pmax).
-
Compression pressure (Pc).
-
Combustion pressure curve (P-θ diagram).
-
Rate of pressure rise.
-
Combustion timing relative to crank angle.
Multiple measurement cycles will be recorded for each cylinder to ensure accurate and representative data.
C) Combustion Analysis and Performance Evaluation.
​
Collected data will be analyzed using specialized combustion analysis software.
This analysis will include:
​
-
Comparison of cylinder pressure diagrams.
-
Identification of deviations in combustion performance.
-
Assessment of fuel injection timing.
-
Evaluation of cylinder load balance.
-
Identification of abnormal combustion behavior.
Significant deviations between cylinders will be identified and corrective actions recommended.
D) Engine Optimization and Timing Adjustment.
​
Where required, corrective adjustments will be carried out to optimize engine performance.
This may include:
​
-
Adjustment of fuel injection timing.
-
Cylinder balancing through fuel pump timing correction.
-
Verification of injector performance indicators.
-
Confirmation of proper combustion characteristics.
​
After adjustments are completed, a second set of indicator measurements will be performed to confirm improved engine balance and optimized combustion performance.
E) Final Performance Verification.
​
Following optimization, the engine will undergo final verification to confirm stable and balanced operation.
This includes:
​
-
Verification of balanced Pmax values across cylinders.
-
Confirmation of acceptable compression pressure levels.
-
Review of exhaust temperature distribution.
-
Validation of overall engine operating performance
F) Deliverables
​​
Upon completion of the service, the Client will receive a comprehensive Engine Performance Analysis Report, including:
-
Electronic indicator diagrams for each cylinder.
-
Cylinder performance comparison charts.
-
Combustion analysis results.
-
Summary of timing adjustments performed.
-
Engine optimization results and performance improvements.
-
Technical recommendations for future maintenance and monitoring.
The report provides a detailed reference for ongoing engine performance management.
Execution Duration
​​
Estimated execution time: 2 working days per engine.
The work will be carried out while the engine is operating under normal load conditions, minimizing operational disruption, and will include on-site training of the crew.
Client Benefits
​
By performing systematic engine optimization using electronic indicator scope technology, operators benefit from:
-
Improved engine efficiency and reduced fuel consumption.
-
Increased engine reliability and reduced risk of unplanned failures.
-
Reduced thermal and mechanical stress on engine components.
-
Improved generator load stability.
-
Extended component service intervals.
This service is particularly beneficial for vessels operating multiple auxiliary engines continuously, where even small efficiency improvements translate into significant operational savings.
