船用柴油机被誉为船舶的动力“心脏”，可分为低速、中速、高速柴油机。目前，MAN和Wärtsilä(瓦锡兰)是全球船用柴油机两大品牌，其中MAN是船用低速机龙头，瓦锡兰是船用中速机龙头。

　　2011年，世界新船订单锐减，船用柴油机市场需求乏力，MAN Diesel & Turbo订单额同比增长6.2%，但与2010年的18.6%相比有了显著回落；瓦锡兰Ship Power订单额则同比下降7.7%。

　　为了增强竞争实力，巩固市场地位，2011年世界船用柴油机龙头纷纷加快在华布局。5月，MAN Diesel & Turbo在中国常州的二期工程开业；6月，瓦锡兰与江苏萃兴海洋工程有限公司成立合资公司，着力生产W26型和W32型船舶四冲程中速发动机。11月，Caterpillar与安庆中船柴油机有限公司成立合资公司，这也是Caterpillar在中速船用柴油机领域的全球唯一一家合资公司。

　　在中国，船用低速柴油机全部是引进许可证制造的，其中95%以上的是MAN和瓦锡兰的许可证产品。船用中速机中1/3为MAN和瓦锡兰等企业的许可证产品，主要用于远洋船舶的发电机组。其余为本土企业研发、生产，主要用于近海和内河船舶。2011年，广州中船分别与MAN和瓦锡兰签订船用柴油机技术引进协议，至此MAN在中国的技术授权商达到16家，瓦锡兰达到9家。

　　通过引进、消化吸收，中国船用柴油机企业在生产能力、产品结构、自主研发等多个方面取得重大进展。

•     生产水平稳步提高

　　2010年，中国船用低速机产能达到1200万马力，产量为430.6万马力，较2007年增长了39.4%；船用中速机产量达到824.5万马力，较2007年增长了73.1%。

　　2011年，中国船用柴油机生产情况较2010年有了显著改善，全年大连船柴、宜柴、镇江中设产量分别达到101台/163万马力、101台/104万马力、713台（包括14台低速机）；熔安动力和安泰动力的产量则同比翻番，均达到40台。

•     产品结构日趋完善

　　近年来，中国船用柴油机企业加大产品结构调整力度，研制并批量生产大功率、大缸径或智能型船用低速机、新型中速柴油机等产品，使中国专利船用柴油机国产化研制不断取得新进展。

　　自2011年1月1日起船用柴油机IMO TierⅡ标准正式实施，再加上2016年起即将实施的船用柴油机IMO TierⅢ标准，将促使企业继续加快船用柴油机产品结构调整，使其向节能环保型发展。

•     自主研发能力实现突破

　　2011年4月，镇江中船设备有限公司首台完全自行生产的低速机——6S42MC/ZJ3#机交验用户；同年11月，中船重工自主品牌船用中速柴油机6CS21/32研制成功，并正式推向市场。

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he marine diesel engine is crowned as the “heart” that provides power for the vessel, falling into low-speed, middle-speed and high-speed marine diesel engines. Presently, the world’s two prominent marine diesel engine brands are MAN and W?rtsil?, of which the former is regarded as the low-speed marine diesel engineer tycoon, while the latter is the middle-speed titan.   

The new vessel orders worldwide witnessed steep drop in 2011, causing the bleak demand for marine diesel engine. The order book of MAN Diesel & Turbo saw a year-on-year increase of 6.2%, but the figure was far behind that of 18.6% in 2010; by contrast, the order value of W?rtsil? Ship Power decreased by 7.7% year-on-year.

In order to enhance competitive edge and consolidate the market dominance, international marine diesel engine giants in 2011 accelerated their expansion in the Chinese market. In May, the phase-Ⅱ project of MAN Diesel & Turbo started business in Changzhou; in June, W?rtsil? and Jiangsu Cuixing Ocean Engineering established a joint venture which was specialized in the production of W26, W32 four-stroke middle-speed engine; in November, Caterpillar teamed up with Anqing CSSC Marine Diesel Co., Ltd. to set up a joint venture which was also the world’s only joint venture of Caterpillar in middle-speed marine diesel engine sector.

In China, the production of all low-speed diesel engines should be accredited by foreign tycoons such as MAN and W?rtsil? (occupying over 95%). In particular, one third of middle-speed diesel engines are licensed by MAN and W?rtsil?, being mainly applied as generating units of ocean vessels. And the rest are applied for the R&D and production of offshore and inland vessels. In 2011, CSSC Guangzhou Marine Diesel Co., Ltd. separately signed marine diesel engine technology import agreements with MAN and W?rtsil?. Taken together, MAN had 16 China-based technology authorized dealers, while W?rtsil? had 9 ones.

Chinese marine diesel engine enterprises made remarkable progress in many aspects such as capacity, product structure and independent R&D through import.

• Improvement in the Level of Production

In 2010, the low-speed marine diesel engine capacity of China hit 12 million horsepower, while the output realized 4.306 million horsepower, rising 39.4% over 2007.And the middle-speed marine diesel engine output registered 8.245 million horsepower, an increase of 73.1% over 2007.

In 2011, the production of marine diesel engine in China witnessed remarkable progress over 2010, with the output of Dalian Marine Diesel Co., Ltd., Yichang Marine Diesel Engine Co., Ltd., Zhenjiang CME Co., Ltd. reaching 101 units (1.63 million horsepower), 101 units (1.04 horsepower) and 713 units (including 14 units of low-speed engines). By contrast, both the output of Hefei RongAn Power Machinery Co., Ltd. and Jiangsu Antai Power Machinery Co., Ltd. doubled year-on-year to 40 units.

• Gradual Perfection in Product Structure

In recent years, China’s marine diesel engine enterprises have intensified their efforts to adjust product structure, developed and realized mass-production of high-power, big-cylinder diameter or intelligent low-speed marine diesel engines, new-type middle-speed diesel engines, etc, making it possible for China to make gradual progress in the domestication R&D of patent marine diesel engines.

The IMO TierⅡ standard of marine diesel engine was formally effective since Jan.1, 2011. Coupled with the IMO TierⅢ standard that is to take effect in 2016, the relevant enterprises are forced to make continual effort to facilitate the structural adjustment of marine diesel engines, in a bid to accelerate the environment friendly-driven model.  

• Breakthrough in Independent R&D Capability

In April 2011, the first independently developed low-speed engine, 6S42MC/ZJ3#, by Zhenjiang CME Co. Ltd (ZJCME) was delivered; then in November, CSIC successfully developed middle-speed diesel engine, 6CS21/32, and formally launched it into the market.