Fuel engine emission calculation method and system based on hydrogen balance method, and medium

By calculating exhaust mass flow rate and pollutant mass flow rate using the hydrogen balance method, the problem of carbon balance method failure in low-carbon and zero-carbon fuel engines is solved, and high-precision emission calculation and control are achieved.

CN122329699APending Publication Date: 2026-07-03CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
Filing Date
2026-06-02
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

The existing carbon balance method has a significantly reduced accuracy in calculating low-carbon and zero-carbon fuel engines, and cannot meet the requirements for emission testing and energy efficiency assessment of new fuel engines.

Method used

Using the hydrogen balance method as the conservation benchmark, the exhaust mass flow rate and pollutant mass flow rate are calculated by hydrogen element, and real-time correction is performed by combining factors such as intake humidity and exhaust composition to construct an emission calculation model.

Benefits of technology

It achieves high-precision emission calculation for low-carbon and zero-carbon fuel engines, meets the requirements for engine emission certification and precise control, and is applicable to various types of new fuels.

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Abstract

This invention discloses a method, system, and medium for calculating emissions from fuel engines based on the hydrogen balance method, relating to the field of data processing technology. The method first acquires data such as fuel composition, emission concentration, intake air flow rate, temperature, and humidity; then calculates the actual exhaust mass flow rate based on the intake air flow rate or fuel flow rate; finally, it combines the exhaust molar mass and NO... x The system calculates pollutant mass flow rate by applying correction factors and pollutant concentrations. It includes data acquisition, exhaust flow calculation, and pollutant flow calculation units. This invention replaces carbon balance with hydrogen balance, is not limited by fuel carbon content, and is compatible with low-carbon and zero-carbon fuels such as highly hydrogen-blended fuels, methanol, pure hydrogen, and pure ammonia. Coupled with intake air humidity, turbocharging and intercooling, and exhaust component correction, it significantly improves the accuracy of exhaust flow rate and pollutant emission calculations, solving the problem of traditional carbon balance methods failing under zero-carbon fuel conditions. It is suitable for accurate emission measurement and certification of various engines.
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