| 摘要 |
#CMT# #/CMT# A car engine with a post-treatment system (3) for exhaust gas,incorporates an ammonia generator to initiate the system (3),comprising heater(s) and a reservoir containing a metal ammine complex salt which decomposes on heating to form first ammonia and then hydrogen and nitrogen. #CMT# : #/CMT# An engine group (1) for a motor vehicle comprising an internal combustion engine (4) connected to an inlet circuit and an exhaust circuit with a post-treatment system (3) and an exhaust pipe (19),in which there is an ammonia generator (20) to initiate system (3) comprising heater(s) (19,24) and reservoir(s) (21) containing compound(s) of formula Ma(NH3)nXz (I),in which M : alkali or alkaline earth metal,transition metal or a combination such as K2Zn,CsCu or K2Fe; X : fluoride,chloride,bromide,iodide,nitrate,thiocyanate,sulfate,molybdate or phosphate; a,z : numbers of cations and anions respectively; z : 2-12 .Independent claims are also included for (1) a method (M1) for generating dihydrogen in (1) from an ammonia generator (20) as above,in which the reservoir (21) is heated by a heater (19,24) to decompose (I) into ammonia and then into dihydrogen and dinitrogen,and the resulting H2 is injected into the inlet circuit by an injector (22) (2) a method (M2) for generating ammonia in (1),as described for M1 . #CMT#USE : #/CMT# In petrol engines and diesel engines,normal or turbocharged. #CMT#ADVANTAGE : #/CMT# An improved system for generating ammonia to initiate a post-treatment system (catalyst and/or particle filter) in motor vehicles. This is based on the use of complex compounds which make it possible to store,liberate and burn hydrogen and also to profit from the exothermic reaction of hydrogen with oxygen by an increase in the temperature of the post-treatment system. These complexes are regenerated by adding ammonia gas or liquid ammonia to the salt in the reservoir. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a diagram of a car engine (1) with an ammonia generator. 2 : turbo-charged cylinders 3 : post-treatment system 4 : engine 8 : induction manifold 9 : inlet pipe 10 : air filter 13 : butterfly box 15a : compressor 15b : compressor turbine 16 : intermediate cooler 18 : exhaust manifold 19 : exhaust pipe 20 : ammonia generator 21 : reservoir containing metal ammine complex salt 22 : injector 23 : connection to reservoir 24 : heater. #CMT#MECHANICAL ENGINEERING : #/CMT# Preferred System: The heater comprises at least part of the exhaust pipe (19) located near the reservoir (21),and/or an electrical resistance heater (24). The reservoir (21) is in the inlet circuit,e.g. upstream from the inlet manifold (8) or upstream from the combustion chamber of the engine (4),and/or in the exhaust circuit,e.g. downstream from the exhaust manifold (18). |
