A high compression ratio two-stroke gasoline compression ignition device and control method

A high compression ratio, two-stroke technology, applied in engine control, charging system, combustion engine, etc., can solve uninvolved problems, reduce mixing, reduce scavenging dead zone, and improve air exchange quality.

CN106762102BActive Publication Date: 2018-12-21TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-12-21

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Abstract

The invention discloses a high compression ratio two-stroke gasoline compression ignition device and a control method. The stroke length of an air cylinder of the device is 90mm-110mm; a fuel injector and an electric heating plug are separately mounted on the top of the air cylinder; five scavenging ducts are separately formed in the side wall of a crankcase; the lower port of each scavenging duct communicates with the crankcase and communicates with the gas cylinder; a scavenging duct valve is mounted at the lower port of the fifth scavenging duct; a gas inlet is formed in the side wall of the crankcase, and a gas inlet pipe communicates with the crankcase; a gas compressor, a gas inlet control valve, an intercooler and a reed valve are successively mounted on the gas inlet pipe along the gas inlet direction; one end of a gas inlet by-pass pipe is connected to a gas inlet pipe between a turbine motor and the intercooler while the other end is connected to a gas inlet pipe between the intercooler and the reed valve; and an exhaust recycling pipe communicates between the outlet port of an exhaust pipe and the inlet port of the gas inlet pipe. The power is improved, and the oil consumption and discharge are reduced.
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Description

technical field

[0001] The invention relates to a two-stroke gasoline engine, in particular to a high compression ratio two-stroke gasoline compression ignition device and a control method. Background technique

[0002] The main difference between the working process of a two-stroke gasoline engine and a four-stroke gasoline engine is the ventilation process. The air intake, compression, work and exhaust of a four-stroke gasoline engine are completed in four strokes, while that of a two-stroke gasoline engine is completed in two strokes. Because the crankshaft has a working stroke every revolution, therefore, when the working volume and speed of the two-stroke gasoline engine are the same as those of the four-stroke gasoline engine, its power should be twice that of the four-stroke gasoline engine in theory. Moreover, due to the large number of working cycles at the same speed, the output torque is uniform and the operation is relatively stable. In addition, most two-strok...

Examples

Embodiment 1

[0033] (1) When starting cold, the electronic control unit ECU controls the glow plug 2 to heat the mixture in the cylinder, and the glow plug 2 does not work under non-cold start conditions. The ECU controls the intake control valve 16 to open to the intake bypass pipe 15, controls the long scavenging channel valve 7 to close, and controls the external exhaust gas recirculation valve 21 to close. When the piston is near the top dead center, the volume of the crankcase 5 increases, the pressure in the crankcase 5 decreases, the reed valve 13 opens, fresh air flows in from the inlet of the intake pipe 12, and is pressurized by the compressor 17. Then through the intake control valve 16, the intake bypass pipe 15 and the reed valve 13, the crankcase 5 is charged for the first time; When the upper opening of the fourth scavenging passage 11 is opened, the fresh air of the crankcase enters the cylinder scavenging air from the first scavenging passage 8, the second scavenging passa...