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Tests were performed with a light-vehicle diesel engine. Four representative operating conditions in 1600r/min speed have been considered. The influence of injection pressure, injection timing, and multiple injection strategies on the diesel engine emission characteristics and fuel consumption has been investigated. The results show that low NOx and soot emissions can be obtained in the condition...
High-altitude calibration of CA6DL2-35E3R common rail diesel engine was finished on engine high altitude simulating environment test bed. The interactions between injection parameters and its impact on engine high altitude performance were studied. Results show that the fuel delivery per cycle per cylinder increases with the adwance of injection timing and the increase of common rail pressure at the...
Based on diesel engine equipped with common rail, the multi-injection strategies common rail diesel engine test bed is established with NI test system. In this test bed, the influences of optimized multi-injection strategies to diesel engine performances are studied. The test results show that by using multi-injection strategies, the diesel engine exhaust temperature can reduce 50°C, and noises can...
The challenge for the high speed direct injection (HSDI) diesel engines today is to reduce harmful emissions of diesel engines, such as particulate matter (PM) and Nitrogen oxides (NOx), and enhance the fuel efficiency and power. To meet this challenge, more accurate control of injection parameters such as the injection timing, injection rate, and injection quantity is required. Compared with solenoid...
Dynamic pressure fluctuation inside the common rail directly refers to the balance of inject-fuel quantity in electronic control diesel engine currently. In this paper, these models of the common rail injection system are created with ASW software. and three parameters of pressure fluctuation average volume, experiment quotient volume and instantaneous pressure fluctuation rate are established. Meanwhile,...
In this paper, the control methods of common rail pressure by regulating rate of entering flow are studied. The control circuit and solenoid valve are trial-manufactured. The pressure of common rail controlled by trial-manufactured solenoid valve are tested in test-bed. The results show that The opening time of Trial-manufactured solenoid valve is 1.1 ms, and its closing time is 0.9 ms. it can satisfy...
The common rail electro-injector is the most complicated and important component in the common rail injection system of a diesel engine, whose configuration and performance determine the performance of the common rail injection. The work process of a common rail electro-injector involves the electromagnetism, mechanical dynamics and hydrokinetics, and there are coupling phenomena in these systems...
The main objective of this study is to develop the injection control strategy for high pressure common rail diesel engine based on the Electronic Control Unit (ECU) with the micro-controller MPC555. The control software was designed by modularization method according to various working conditions of diesel engine. The software modules include the fuel quantity control module, rail pressure control...
For improving power output, fuel economy, and emissions of diesel engines, pressure feedback technology is introduced to electronic control high pressure common rail system. In this paper, the geometry characteristic index in the pressure difference curve is presented after analyzing pressure difference curve; the relations of the pressure characteristic indexes with injection parameter, output torque...
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