Abstract: A device for distributing recirculated gases to a component of an exhaust gas recirculation system. The device includes an inlet and an outlet for recirculated gases, an inlet port and an outlet port to the component, and a mechanism to reverse the stream of recirculated gases flowing through the component. A device for cooling recirculated exhaust gases is equipped with a mechanism to reverse the stream of recirculated gases inside the exchanger. A method of recirculating exhaust gases includes cleaning the EGR system, which is triggered by an electronic unit, and which includes reversing the stream of EGR gases flowing through an EGR cooling device.

Abstract: A device for distributing recirculated gases to a component of an exhaust gas recirculation system. The device includes an inlet and an outlet for recirculated gases, an inlet port and an outlet port to the component, and a mechanism to reverse the stream of recirculated gases flowing through the component. A device for cooling recirculated exhaust gases is equipped with a mechanism to reverse the stream of recirculated gases inside the exchanger. A method of recirculating exhaust gases includes cleaning the EGR system, which is triggered by an electronic unit, and which includes reversing the stream of EGR gases flowing through an EGR cooling device.

Abstract: Novel imido copolymers are prepared by copolymerizing:[i] a bis-maleimide of the structural formula: ##STR1## with [ii] a (meth)acrylic acid amide.The subject copolymers are applicable to the production of a variety of useful shaped articles, coatings, laminates, foams, and the like.

Abstract: Novel imido copolymers are prepared by copolymerizing:[i] a bis-maleimide of the structural formula: ##STR1## [ii] an olefinically unsaturated comonomer copolymerizable therewith. The subject copolymers are applicable to the production of a variety of useful shaped articles, coatings, laminates, foams, and the like.

Abstract: A cellular material is disclosed based on a polymer with imide groups, characterized in that it is obtained by heating a mixture comprising:A. a bis-maleimide of the formula ##STR1## in which the symbol B represents a phenylene radical or a radical of the formula ##STR2## where T represents --CH.sub.2 --, --O-- or --SO.sub.2 --; b. a furfuraldehyde derivative of the formula.SIGMA.-- R.sub.1 -- CO -- R.sub.1 --.SIGMA.'in which the symbol .SIGMA. represents a radical of the formula ##STR3## and the symbols R.sub.1 represent a valency bond or a --CH=CH-- group, and the symbol .SIGMA.' represents a radical .SIGMA., an aliphatic, cycloaliphatic or aromatic monovalent radical R containing up to 12 carbon atoms, or a --R'--CO--R" radical, where R' represents an aliphatic, cycloaliphatic or aromatic divalent radical containing up to 12 carbon atoms and R" represents a monovalent radical R or a radical .SIGMA.; andC. a blowing agent.

Abstract: Multicellular polymers having excellent chemical inertness and heat resistance are produced by heating at a temperature from 100.degree. to 300.degree.C, maleic anhydride and a polyaldimine of the general formulaA (N = CH -- G).sub.n (I)in which G represents a monovalent organic radical which contains less than 35 carbon atoms and at least one aromatic or heterocyclic ring in the .alpha.-position to the imine group in formula (I), A represents an organic radical of valency n which contains less than 50 carbon atoms and at least one aromatic or heterocyclic ring in the .alpha.-position to the imine group in formula (I), and n represents a number at least equal to 2.

Abstract: Bis-(4-furfurylidenamino-phenyl)-methane, m.p. 90.degree.-91.degree.C., is made by reacting furfural with bis-(4-aminophenyl)-methane in diethyl ether. It is useful in photography.