Hydrogen engine crankcase hydrogen concentration control method, system and electronic device

By taking air from the hydrogen engine's intake pipe and combining it with a full-condition supplemental air volume database and closed-loop correction, and using a throttle valve to adjust the opening, the accuracy and safety issues of hydrogen concentration control in the hydrogen engine's crankcase were solved, achieving precise control and rapid response, and reducing maintenance costs.

CN120968817BActive Publication Date: 2026-04-28FAW JIEFANG AUTOMOTIVE CO
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Patent Information

Application Number
CN202511342995.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-19
Publication Date
2026-04-28
Estimated Expiration
2045-09-19

AI Technical Summary

Technical Problem

Existing technologies for controlling hydrogen concentration in the crankcase of hydrogen engines suffer from problems such as insufficient gas supply, reliance on adsorption components leading to easy failure, or control lag resulting in low control accuracy and insufficient safety.

Method used

By drawing air from the engine intake manifold, it provides several times more fresh air than traditional methods. Combined with a full-condition replenishment air volume database and closed-loop correction, and by adjusting the opening of the throttle valve, it achieves precise control of hydrogen concentration, avoids reliance on adsorption components, and responds to changes in operating conditions in real time.

Benefits of technology

It achieves precise matching of gas replenishment volume under different operating conditions, rapid response to hydrogen concentration deviation, reduction of crankcase hydrogen concentration, ensuring engine safety and performance, reducing maintenance costs, and adapting to the operational needs throughout the entire life cycle.

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Abstract

The application discloses a hydrogen engine crankcase hydrogen concentration control method, and relates to the field of hydrogen engines, which comprises the following steps: placing a hydrogen engine on a test bench to test, obtaining a target hydrogen concentration, an actually measured hydrogen concentration and a crankcase blow-by amount; calculating a target working condition supplementary air amount according to the target hydrogen concentration, the actually measured hydrogen concentration and the crankcase blow-by amount; generating a full working condition supplementary air amount database according to the target working condition supplementary air amount, based on the rotating speed and the load of different working conditions; obtaining the fresh air amount required to be supplemented by a current target working condition according to the full working condition supplementary air amount database; obtaining an intake air pressure, an intake air temperature and a crankcase pressure; combining the intake air pressure, the intake air temperature and the crankcase pressure to calculate a throttle opening degree; comparing the hydrogen concentration measured by a hydrogen concentration sensor according to the current target working condition with the target hydrogen concentration to obtain a hydrogen concentration deviation; generating a corrected fresh air amount; and performing closed-loop control on the actual crankcase hydrogen concentration by adjusting the throttle opening degree.
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