INTERNAL COMBUSTION ENGINE INJECTION TIME CONTROL METHOD (VERSIONS)

FIELD: mechanical engineering; internal combustion engines. ^ SUBSTANCE: invention can be used in system to control injection of gas into internal combustion engine. Invention relates to method of control of time of injection of gas into internal combustion engine equipped with gas injection control system including gas cylinder, gas reducer, fuel manifold fuel manifold gas pressure pickup, oxygen concentration pickup in exhaust gases, microprocessor control unit and nozzles which gas injection time is calculated depending on gas pressure in fuel manifold. With fuel manifold gas pressure pickup in good repair, gas pressure in fuel manifold is periodically measured and recorded, and failure of gas pressure pickup is revealed by difference between newly measured pressure value and stored pressure value, and in case of failure said pickup last memorized pressure value is used for calculating injection time. According to second design version, with engine operating under constant load, time of gas injection is adjusted using readings of oxygen concentration pickup to stoichiometric state fuel mixture, and gas pressure value in fuel manifolds is calculated basing on time of injection at which mixture is in stoichiometric state, and calculated value is memorized. In case of failure of pickup, said memorized pressure value is used for calculating time of injection. ^ EFFECT: provision of control of time of injection in case of failure of gas pressure pickup in fuel manifold. ^ 3 cl, 1 dwg