Injection control method, controller, control system, control device and engine
A control method and engine technology, applied in the fields of control devices, injection control methods, control systems, engines, and controllers, can solve problems such as engine power shortage and emission deterioration
Active Publication Date: 2021-06-18
WEICHAI POWER CO LTD +1
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Problems solved by technology
[0004] The object of the present invention is to provide an injection control method, a controller, a control device, a control system and an engine, so as to solve the problems of insufficient power of the engine and deterioration of emissions during the operation of the single-point injection engine
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Embodiment Construction
[0032] Based on the fact that the single-point injection engine is prone to lack of engine power and deterioration of emissions during operation, the inventor has done in-depth research and a large number of test verifications, and surprisingly found that the reasons for the lack of engine power and deterioration of emissions are related to the intake manifold. There is a certain connection between the failure of the injection valve.
[0033] After a lot of theoretical and experimental demonstrations, the conclusion is that, in the actual fuel injection process of the single-point injection cylinder machine, when a certain group of injection valves in the multi-group injection valves of uniform injection fails, the fuel of each cylinder is uniform when it is working. Sexuality will then have an impact, which in turn will cause the mixture to be lean when some cylinders are working.
[0034] Taking the 4-cylinder engine with single-point injection as an example, its working seq...
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The invention discloses an injection control method, a controller, a control system and an engine. The injection control method, the controller and the control system are applied to the engine using fuel single-point injection. A plurality of sets of injection valves are arranged in an air inlet manifold of the engine, and when parts of the injection valves in the multiple sets of the injection valves are in a fault state and the engine currently meets the fuel injection execution condition, the injection modes of the injection valves in the normal state at present are adjusted to be matched with the control targets of uniform distribution of fuel injection in one working cycle. By adjusting the injection modes of the injection valves in the normal state at present, fuel injection in one working cycle is evenly distributed, so that the air-fuel ratio distribution of the air inlet manifold in one working cycle is kept relatively uniform, and thus all air cylinders of the engine can be evenly covered. The situation that parts of the injection valves in the multiple sets of the injection valves are in a fault state, so that the air-fuel ratio is low during working of parts of the air cylinders is avoided, and the problems that power of the engine is insufficient and emission is deteriorated are avoided.
Description
technical field [0001] The invention relates to the technical field of engine fuel injection, in particular to an injection control method, a controller, a control device, a control system and an engine. Background technique [0002] There are generally two types of gas engines for road use: 4-cylinder engines and 6-cylinder engines. Among them, the single-point injection cylinder engine means that the gas injection is completed in the intake manifold of the multi-cylinder engine, mixed with air, and then enters each cylinder of the engine. Fuel injection quantity requirements, under normal circumstances, a single-point injection cylinder engine arranges multiple sets of injection valves on the intake manifold. However, during the actual fuel injection process of the single-point injection cylinder engine, the engine is still prone to problems such as deterioration of NOx emissions, failure to meet regulatory requirements, and insufficient power. [0003] To sum up, how to ...
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IPC IPC(8): F02D41/30
CPCF02D41/30Y02T10/40Y02T10/30
Inventor 曹石孙龙洋李国朋孙明峰
Owner WEICHAI POWER CO LTD