Inyecciones piloto, principal y posterior.
English translation: Pre-, main, post-/secondary injections
| 10:10 Mar 15, 2019 |
| Spanish to English translations [PRO] Tech/Engineering - Automotive / Cars & Trucks | |||||
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|  Selected response from: Helena Chavarria Spain Local time: 23:00 | ||||
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| 3 +2 | Pre-, main, post-/secondary injections |
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Answers
4 hrs confidence: 
peer agreement (net): +2
peer agreement (net): +2Pre-, main, post-/secondary injections Explanation: Inyección piloto Método de aporte de combustible utilizado en los equipos de inyección Diesel que consiste en una preinyección antes de que se produzca la inyección principal. Esta inyección consigue aumentar la temperatura de la cámara de combustión y reduce el tiempo que tarda el combustible de la inyección principal en inflamarse. Con la inyección piloto se logra un funcionamiento más suave del motor y se reducen las emisiones de óxidos de nitrógeno. Más información en: Inyección piloto (Automoción) © https://glosarios.servidor-alicante.com El sistema "Common Rail" divide la inyección en una "inyección previa", "inyección principal" y en algunos casos en una "inyección posterior". http://www.aficionadosalamecanica.net/common_rail1.htm Both variants demonstrate similarly short switching times and enable pre-injection, main injection and secondary injection to ensure clean and efficient fuel combustion at every operating point. http://es.bosch-automotive.com/en/internet/parts/parts_and_a... Page 3 Injection rate: pre-, main and post injection The injection rate determines when and how much fuel is injected into the cylinder. In order to reduce emissions and fuel consumption, the present evolution stage of the injection system for MTU engines divides the fuel injection sequence into as many as three separate phases (see Figure 2). https://www.mtu-report.com/desktopmodules/mtu_report_content... -------------------------------------------------- Note added at 4 hrs (2019-03-15 14:53:09 GMT) -------------------------------------------------- Principles Diagram of the common rail system Solenoid or piezoelectric valves make possible fine electronic control over the fuel-injection time and quantity, and the higher pressure that the common rail technology makes available provides better fuel atomisation. To lower engine noise, the engine's electronic control unit can inject a small amount of diesel just before the main injection event ("pilot" injection), thus reducing its explosiveness and vibration, as well as optimising injection timing and quantity for variations in fuel quality, cold starting, and so on. Some advanced common-rail fuel systems perform as many as five injections per stroke. Common-rail engines require a very short to no heating-up time, depending on the ambient temperature, and produce lower engine noise and emissions than older systems. https://en.wikipedia.org/wiki/Common_rail Multiple injections, including pilot injections, post-injections and after-injections, are widely used to control PM and NOx emissions, noise and to manage aftertreatment https://dieselnet.com/tech/engine_fi.php#post There seem to be multiple kinds of injections. I think I would use 'pilot, main and post injections'. |
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