3 results about "Atkinson cycle" patented technology

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.