{"id":2492,"date":"2016-09-12T11:39:22","date_gmt":"2016-09-12T11:39:22","guid":{"rendered":"http:\/\/tomdenton.org\/blog\/?p=2492"},"modified":"2016-09-12T11:39:22","modified_gmt":"2016-09-12T11:39:22","slug":"water-injection","status":"publish","type":"post","link":"http:\/\/tomdenton.org\/blog\/?p=2492","title":{"rendered":"Water injection"},"content":{"rendered":"

Did you know that even advanced gasoline engines waste roughly a fifth of their fuel? Especially at high engine speeds, some of the gasoline is used for cooling instead of for propulsion. With its new water injection, Bosch shows that it does not have to be that way. Particularly when accelerating quickly or driving on the freeway, the injection of additional water makes it possible to reduce fuel consumption by up to 13 percent. \u201cWith our water injection, we show that the combustion engine still has some tricks up its sleeve,\u201d says Dr. Rolf Bulander, chairman of the Bosch Mobility Solutions business sector and member of the board of management of Robert Bosch GmbH. The fuel economy offered by this Bosch technology comes especially to the fore in three- and four-cylinder downsized engines: in other words, in precisely the kind of engines to be found under the hood of any average midsize car.<\/p>\n

\"bosch-wassereinspritzung\"<\/a><\/p>\n

Extra boost for the turbocharged engine<\/p>\n

But it is not only in the area of fuel economy that the Bosch innovation comes into play. It can make cars more powerful as well. \u201cWater injection can deliver an extra kick in any turbocharged engine,\u201d says Stefan Seiberth, president of the Gasoline Systems division at Bosch. Earlier ignition angles mean that the engine is operated even more efficiently. On this basis, engineers can coax additional power out of the engine, even in powerful sports cars.<\/p>\n

The basis of this innovative engine technology is a simple fact: an engine must not be allowed to overheat. To stop this happening, additional fuel is injected into nearly every gasoline engine on today\u2019s roads. This fuel evaporates, cooling parts of the engine block. With water injection, Bosch engineers have exploited this physical principle. Before the fuel ignites, a fine mist of water is injected into the intake duct. Water\u2019s high heat of vaporization means that it provides effective cooling.<\/p>\n

\"infographic-water_injection-2\"<\/a><\/p>\n

This is also the reason only a small additional volume of water is needed: for every one hundred kilometres driven, only a few hundred millilitres are necessary. As a result, the compact water tank that supplies the injection system with distilled water only has to be refilled every few thousand kilometres at the most. And if the tank should run empty, there is nothing to worry about: the engine will still run smoothly \u2013 albeit without the higher torque and lower consumption provided by water injection.<\/p>\n

Additional questions and answers<\/h2>\n

Is this technology already in production?<\/strong><\/p>\n

The BMW M4 GTS is the first production vehicle to feature an innovative and ground-breaking water injection system. In the vehicle\u2019s turbocharged six-cylinder engine, it offers improved performance and consumption even at full load. Bosch supplies water injection parts for the BMW M4 GTS.<\/p>\n

How high is fuel consumption in the driving cycle?<\/strong><\/p>\n

In the future consumption test (WLTC), water injection makes it possible to save up to 4 percent fuel. In real driving conditions, even more is possible: here, fuel consumption can be reduced by up to 13 percent when accelerating quickly or driving on the freeway.<\/p>\n

Doesn\u2019t water injection cause the engine to rust?<\/strong><\/p>\n

No. No water is left in the combustion chamber. The water evaporates before combustion happens in the engine. All the water is expelled into the environ-ment, together with the exhaust.<\/p>\n

How is water refilled?<\/strong><\/p>\n

Water injection only requires a small amount of water to be kept on board. On average, it only has to be refilled every 3,000 kilometers. The separate water tank has to be filled with distilled water.<\/p>\n

Can the water in the tank freeze?<\/strong><\/p>\n

When the engine is stopped, the water flows back into its tank, where it may freeze. Following engine restart, the water thaws again.<\/p>\n

Is there such a thing as direct water injection?<\/strong><\/p>\n

Bosch uses a port injection system, since it has clear technical advantages and costs less. This makes water injection suitable for large-scale production, as well as for many vehicle segments.
\nLinks:\u00a0Bosch water injection: Online special with videos and animated films:\u00a0\u00a0http:\/\/www.bosch-mobility-solutions.com\/en\/powertrain-electrified-mobility\/water-injection\/ <\/a><\/p>\n

(Source: Bosch Media)<\/p>\n","protected":false},"excerpt":{"rendered":"

Did you know that even advanced gasoline engines waste roughly a fifth of their fuel? Especially at high engine speeds, some of the gasoline is used for cooling instead of for propulsion. With its new water injection, Bosch shows that it does not have to be that way. Particularly when accelerating quickly or driving on […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[15],"tags":[],"class_list":["post-2492","post","type-post","status-publish","format-standard","hentry","category-automotive"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p79TdE-Ec","jetpack-related-posts":[{"id":1509,"url":"http:\/\/tomdenton.org\/blog\/?p=1509","url_meta":{"origin":2492,"position":0},"title":"Production milestone for gasoline direct injection","author":"Tom Denton","date":"November 16, 2012","format":false,"excerpt":"50 million injection valves and 10 million high-pressure pumps manufactured at Bosch Rapid market growth continues Gasoline direct injection is key for economical engines Up to 15 percent lower fuel consumption and CO2 emissions Global manufacturing network Gasoline direct injection systems are continuing to enjoy rapid market growth. Thanks to\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2438,"url":"http:\/\/tomdenton.org\/blog\/?p=2438","url_meta":{"origin":2492,"position":1},"title":"Direct injection for CNG engines","author":"Tom Denton","date":"September 11, 2015","format":false,"excerpt":"Introduction Direct injection is not only something for diesel and gasoline engines. In compressed natural gas (CNG) engines, it could also make cars even more economical and eco-friendly. Driving enjoyment would also be boosted: compared with present systems that use manifold gas injection, it could deliver as much as 60\u2026","rel":"","context":"In "Alternative fuel"","block_context":{"text":"Alternative fuel","link":"http:\/\/tomdenton.org\/blog\/?cat=39"},"img":{"alt_text":"Direct4Gas-Infografik_EN_150908","src":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2015\/09\/1-BBM-21524-e-300x200.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":2383,"url":"http:\/\/tomdenton.org\/blog\/?p=2383","url_meta":{"origin":2492,"position":2},"title":"Electrification and internet in the car","author":"Tom Denton","date":"May 7, 2015","format":false,"excerpt":"Bosch is linking new technologies to gasoline and diesel \u00a0\u00a0\u00a0 Gasoline engines: 350 bar for direct injection \u00a0\u00a0\u00a0 Diesel engines: 48-volt hybrid to reduce nitrogen oxide emissions \u00a0\u00a0\u00a0 Dr. Rolf Bulander: \u201cBits and bytes are making cars more efficient\u201d Paper for download: Dr. Rolf Bulander - Powertrain optimization using a\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"1-DS-19451-e","src":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2015\/05\/1-DS-19451-e-e1430995175337-1024x486.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2015\/05\/1-DS-19451-e-e1430995175337-1024x486.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2015\/05\/1-DS-19451-e-e1430995175337-1024x486.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/tomdenton.org\/blog\/wp-content\/uploads\/2015\/05\/1-DS-19451-e-e1430995175337-1024x486.jpg?resize=700%2C400 2x"},"classes":[]},{"id":1737,"url":"http:\/\/tomdenton.org\/blog\/?p=1737","url_meta":{"origin":2492,"position":3},"title":"Under Pressure\u2026","author":"Tom Denton","date":"November 29, 2013","format":false,"excerpt":"Higher injection pressure saves fuel and also increases performance and torque. \"Over the next decade, the vast majority of diesel engines will manage with injection pressures of around 2,000 bar. Although 3,000 bar is not unrealistic, it will be limited to racing cars and high-performance diesel engines.\" (Dr. Markus Heyn,\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":524,"url":"http:\/\/tomdenton.org\/blog\/?p=524","url_meta":{"origin":2492,"position":4},"title":"Common Rail","author":"Tom Denton","date":"September 7, 2010","format":false,"excerpt":"Bosch is the only company worldwide to offer common-rail systems for the entire engine spectrum, from passenger-car and diesel commercial-vehicle engines to large diesel engines. Bosch developed the MCRS modular common-rail system for large diesel engines that have high engine speeds, up to 2.2 megawatts of power, and over 2.5\u2026","rel":"","context":"In "Automotive"","block_context":{"text":"Automotive","link":"http:\/\/tomdenton.org\/blog\/?cat=15"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":709,"url":"http:\/\/tomdenton.org\/blog\/?p=709","url_meta":{"origin":2492,"position":5},"title":"Bosch Motorsport GDi","author":"Tom Denton","date":"November 16, 2010","format":false,"excerpt":"\u00b7 High-pressure injection valves with individual jet configuration \u00b7 Precise control of injection quantities \u00b7 For racing vehicles, Bosch Motorsport optimizes production-vehicle technology Bosch Motorsport is offering a new gasoline direct injection system for use in racing vehicles. 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