5 results about "Atkinson cycle" patented technology

To provide an internal combustion engine for executing an Atkinson cycle, which can ensure its strength and reduce its weight for power transmission of an eccentric shaft.SOLUTION: In an internal combustion engine comprising an internal gear 60 and an eccentric shaft 30 and executing an Atkinson cycle, the eccentric shaft 30 has a big end connection part 40 that rotatably connects a big end part 16a of a connecting rod 16, and an external gear part 50 that rotates in mesh with the internal gear 60. The external gear part 50 has a hole part 53 whose area gradually increases from an eccentric side R where the big-end connection part 40 is eccentric relative to the external gear part 50, so that the weight of the eccentric shaft is reduced while maintaining strength for power transmission.SELECTED DRAWING: Figure 3

1. Atkinson engine with external variable compression. 2.1 There are several inventions in the Atkinson cycle that control compression within the engine; one is by varying the length of the connecting rod, and the other is by variably controlling the opening time of the intake valve beyond the bottom dead center of the connecting rod. Both solutions require extensive modifications to the engine design. The objective of this invention is to relocate the variable compression mechanism outside the engine. 2.2 By installing a check valve and a container whose volume can be changed in the inlet channel upstream of the inlet valve, the gas is directed into this container and pressurized when the inlet valve is open, passing over bottom dead center. 2.3. By changing the volume of the container, the pressure in the engine can be varied, thereby changing the compression ratio and also varying the engine's power output, without throttling losses through the carburetor.

The invention relates to a double-crankshaft variable-compression-ratio Atkinson cycle engine. The engine is characterized by comprising an air cylinder body (comprising an air cylinder cover assembly) 1, a piston 2, a piston connecting rod 3, a lever (swing rod) 4, an auxiliary crankshaft 5, a main crankshaft 7, a crankshaft connecting rod 9, a main crankshaft-auxiliary crankshaft constant-ratio transmission part 10 and a main crankshaft-auxiliary crankshaft phase modulator 11; under the combined action of the main crankshaft 7 and the auxiliary crankshaft 5, the position of a lower dead center of an engine piston is periodically changed, so that Atkinson circulation is realized; the transmission phases of the main crankshaft 7 and the auxiliary crankshaft 5 are adjusted through the main crankshaft-auxiliary crankshaft phase modulator 11, the top dead center position of an engine piston is changed, and therefore compression ratio adjustment is achieved.

The present application belongs to the technical field of vehicle engineering, and particularly relates to a waste gas flow diagnosis method, an engine management device, a medium and a controller; on the basis of an exhaust gas recirculation (EGR) cooling water path, an EGR bypass branch is added; by cutting off the medium circulation of the EGR cooler part and maintaining the medium circulation of the remaining part through the bypass branch, a heat exchange layout for fault diagnosis is constructed; based on the temperature rise performance of the EGR cooler in the detection process, the diagnosis of low flow faults and high flow faults can be realized respectively, and it is particularly suitable to be implemented in combination with the self-checking process during the engine warm-up process; during this period, it is not necessary to collect EGR temperature sensor data, which is conducive to reducing the integration difficulty of high-pressure EGR parts; and it has a higher detection rate and a better monitoring frequency IUPR (In Use Performance Ratio) for the above faults; in addition, good results can also be achieved for engines using Atkinson cycle combined with high-pressure EGR technology.

The application aims at solving the problem that high compression ratio, Miller cycle or Atkinson cycle engine is easy to generate knock, which leads to power decline and engine thermal efficiency decline, and provides an electronic water pump compensation control method, device, system, vehicle, medium and equipment when engine knock occurs. The method comprises the following steps: under the current engine working condition, it is judged whether the electronic water pump knock compensation function is started due to engine knock; if the electronic water pump knock compensation function is started due to engine knock, the initial value and the compensation value of the operating parameter of the electronic water pump under the current engine working condition are determined; and the operating parameter of the electronic water pump is started based on the compensation value and the initial value.