![]() When the engine in the process of warming-up, ECU according to the cooling water temperature to check the Map, get the correction angle. The correction: warming correction, overheating correction and idle speed stability correction. The determination of basic ignition advance angle is according to whether connected to an air condition, if so, substitute the corresponding values for the ignition angle. Idle condition of the real ignition advance angle is equal to the basic ignition advance angle plus the correction ignition advance angle. The starting condition of ignition advance angle is according to engine speed and the pressure inside the intake manifold by querying pulse spectra as the initial ignition advance angle. The actual ignition advance angle-basic ignition advance angle correction advance angle. After the start of the operating mode is divided into whether in the idle state, but the ignition advance angle is determined by the type. The starting condition of ignition advance angle is according to engine speed and the pressure inside the intake manifold by querying pulse spectra. In the ignition system, electronic control unit to control of ignition advance angle can be divided into the starting condition and working condition after starting mode. As one of the alternative green fuel oil, natural gas has its own advantages, such as abundant resources, complete combustion, well antidetonating quality, emission, low-temperature operation and so on. In the traditional gasoline engine and diesel engine based on natural gas engine become one of the important ways to relieve the energy problem. So we need to develop a reliable performance, low cost ignition timing device.Īs a large energy consumption of the vehicle, energy conservation and emissions reduction has become the important direction of its development. Natural gas engine’s ignition system is needed to work properly. Then electronic controller output ignition indicator signal to control ignition system work.Įnergy saving and environmental protection is the mainstream in the development of the car, with more attention paid to the natural gas vehicle. When engine is running, ECU according to the engine’s speed and load signal determines the basic ignition advance angle, and according to other relevant signal to correct, finally it ensures the optimum ignition advance angle. This ignition advance angle is the best ignition advance angle. Practice has proved that in front of the engine check point on the compression stroke the certain point of ignition can improve the engine performance and fuel economy. Ignition delay time can effectively reduce the emissions of HC and NOx, eliminate the explosion, but the ignition moment too late can make the engine performance and fuel economy worse. Ignition time properly in advance can improve engine performance and fuel economy, but the premature ignition can easy cause explosion.
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