【作者】

Fredrik Oestman,Tom Kaas

【摘要】

论文已在中国上海举行的第27届CIMAC大会上发表。论文的版权归CIMAC所有。A novel' Self-tuning engine' control con-combustion efficiency, emission levels and overall sta-cept has been developed by Wartsila which ensures bility. To provide the best control performance for an optimal control of the engine throughout its lifetime, arbitrary process, it is essential that the control param- without the need for manual adjustment of the control eters are closely matched with the dynamics of the parameters. For large low-and medium-speed inter-process. For large low-and medium-speed engines, nal combustion engines, the process dynamics is sub-the dynamics are affected by several factors, such as ject to significant variances due to nonlinearities and the operating point of the engine, external conditions a wide range of operating conditions. To ensure the and mechanical wear of components. It follows that control quality at all times, the behaviour of the closed-to guarantee a good control performance throughout loop controllers need consequently to be continuously the lifetime of the engine, it is necessary to adjust matched with respect to the state of the process, sub-the behaviour of the regulators in accordance with the ject to control. Failure to do so typically results in in-dynamic changes. Typically, gain scheduling control creased fuel consumption and emissions, and exci-schemes are used to cope with the dynamic influence tation of oscillations in dynamically linked processes, from the operating points. This approach, however, which otherwise would be stable. For example, if needs periodic manual re-tuning in order to meet the the wastegate valve is slowly oscillating due to poor long-term expectations. To deal with these variances, control parameters, it will directly affect the efficiency Wartsila has developed a self-tuning control concept, of the fuel combustions and the fuel-injection control. which automatically adjusts the behaviour of closed-With the increased price of fuel oil and stricter emis-loop controllers of the engine so that optimal control sion legislations,a large number of various advanced performance is achieved at all times. Diagnostic fea-technologies have been developed, such as electron-tures have been, in addition, included in order to de-icaly controlled fuel injection, high pressure fuel sys-tect faults within the closed-loop circuit in order to detems,2-stage turbo-charging, exhaust-gas treatment tect malfunctions despite the adaptivity of the control systems, variable valve timings, etc. That is, modern loop. In this paper, the self-tuning engine control con-marine and power plant engines comprise of an in-cept is presented with examples from full-scale engine creasing number of complex sub-systems which are tests, proving the robustness and performance of the dynamically interlinked. The question of how well control strategy and the performance of the self-tuning these sub-systems are controlled will consequently engine.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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