共查询到18条相似文献,搜索用时 468 毫秒
1.
2.
点火提前角过大或过小均会使汽油机的功率下降,理论和试验表明,使汽油机临近爆震燃烧的点火提前角为最佳的点火提前角。目前,一般采用分电器点火提前调节装置和微机控制点火提前调节系统来调节点火提前角。 相似文献
3.
4.
5.
6.
本文研究了利用检测汽油机转述单一参数来进行汽油机点火提前角自适应控制的方法,并着重从实用角度出发,在保留原汽油机分电器的基础上,将微机自适应控制和原发动机分电器开环控制结合起来进行联合控制。当汽油机处理稳定转速和缓变速时,由微机进行自适应控制;发动机运行在急变速工况时,则由分电器单独控制。 相似文献
7.
(2)点火提前角控制
①发动机点火提前角特性
ECU控制点火系是将发动机在各种工况下最佳的点火提前角值首先储存在一个控制单元中.而发动机在实际运行时.由系统的ECU根据运行的负荷与转速的实际信号.在所储存的点火特性中取出适应该工况下的点火提前角数值。[第一段] 相似文献
8.
9.
汽油机点火系统电子控制的核心问题是点火提前角电子控制,即点火正时。点火提前角对发动机的动力性、经济性和排放有十分重要的影响。一般来说,增加点火提前角,即提前点火,可以提高发动机的动力性和经济性,但是会增加HC、CO和NOx排放,并可能造成爆震。所以,现代电子控制发动机都对点火正时实行电子控制。而且,越来越多的汽车发动机开始采用无分电器点火系统。本文试图对这个问题进行系统的介绍。 相似文献
10.
桑塔纳2000GSi型轿车采用AJR型发动机,点火线圈分配式同时点火系统,它具有普通电子点火系统的所有优点,且取消了真空式和机械离心式点火提前角调整装置,而由ECU根据汽油机的运行工况对点火 相似文献
11.
TECHNICAL NOTE 总被引:16,自引:0,他引:16
F. Bakhtiari Nejad Associate Professor. S. Azadi 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1998,29(5):331-338
This paper presents an advanced control method in application of automotive systems. An adaptive fuzzy logic controller based on self tuning control methodology has been implemented and used to control the vehicle velocity. Fuzzy rules and reasoning are utilized on-line to determine the throttle angle, spark advance and braking force. Simulated results, as presented in this paper show the adaptive fuzzy control is well suited for vehicle speed control with a nonlinear dynamic behaviour of the engine. 相似文献
12.
13.
本文介绍了一种利用微处理机自适应控制汽油机最佳点火正时的系统。该系统由一单板微处理机和一套全晶体管电子点火装置组成,反馈信号由汽油机转速传感器检取。汽油机稳定工况的台架试验和整车道路试验表明:用这种自适应控制点火系统与用机械分电器装置相比,汽油机的输出功率增大,油耗率下降,整车的动力性和燃油经济性得到提高。 相似文献
14.
15.
P. V. Manivannan M. Singaperumal A. Ramesh 《International Journal of Automotive Technology》2011,12(1):11-20
An idle speed engine model has been proposed and applied for the development of an idle speed controller for a 125 cc two
wheeler spark ignition engine. The procedure uses the measured Indicated Mean Effective Pressure (IMEP) at different speeds
at a constant fuel rate and throttle position obtained by varying the spark timing. At idling conditions, IMEP corresponds
to the friction mean effective pressure. A retardation test was conducted to determine the moment of inertia of the engine.
Using these data, a model for simulating the idle speed fluctuations, when there are unknown torque disturbances, was developed.
This model was successfully applied to the development of a closed loop idle speed controller based on spark timing. The controller
was then implemented on a dSPACE Micro Autobox on the actual engine. The Proportional Derivative Integral (PID) controller
parameters obtained from the model were found to match fairly well with the experimental values, indicating the usefulness
of the developed idle speed model. Finally, the optimized idle speed control algorithm was embedded in and successfully demonstrated
with an in-house built, low cost engine management system (EMS) specifically designed for two-wheeler applications. 相似文献
16.
17.