Abstract: This disclosure relates to a rechargeable battery cell, comprising: an active metal; at least one positive electrode; at least one negative electrode comprising an active material selected from the group consisting of an insertion material made of carbon, an alloy-forming active material, an intercalation material which does not comprise carbon, and a conversion active material; an SO2 based electrolyte comprising a first conducting salt which has the formula (I), wherein: M is a metal selected from the group consisting of alkali metals, alkaline earth metals, metals of group 12 of the periodic table of the elements, and aluminum; x is an integer from 1 to 3; R1, R2, R3 and R4 are selected independently of one another from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, C6-C14 aryl and C5-C14 heteroaryl; and Z is aluminum or boron.

Abstract: This disclosure relates to a rechargeable battery cell, comprising: an active metal; at least one positive electrode; at least one negative electrode comprising an active material selected from the group consisting of an insertion material made of carbon, an alloy-forming active material, an intercalation material which does not comprise carbon, and a conversion active material; an SO2 based electrolyte comprising a first conducting salt which has the formula (I), wherein: M is a metal selected from the group consisting of alkali metals, alkaline earth metals, metals of group 12 of the periodic table of the elements, and aluminum; x is an integer from 1 to 3; R1, R2, R3 and R4 are selected independently of one another from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, C6-C14 aryl and C5-C14 heteroaryl; and Z is aluminum or boron.

Abstract: An engine block of an internal combustion engine is disclosed. The engine block may have a piston and at least one gas exchange valve. The piston may have a piston skirt having a first center axis. The piston may also have a piston head delimiting the piston skirt at the top with a diameter D. The piston head may have a piston head edge and a piston head recess with a piston recess wall having a height H. At least one valve pocket may be formed into the piston head edge. The at least one valve pocket may have a valve pocket depth T with respect to the piston head edge. The valve pocket depth T may fulfill the following condition with respect to the wall height H: 0.05 H<=T<=0.5H.

Abstract: A piston for an internal combustion engine is disclosed. The piston may have a piston skirt with a center axis. The piston may also have a piston crown disposed adjacent a top of the piston skirt. The piston crown may have a diameter D. The piston crown may have a piston crown margin of width b extending in a circumferential direction. The piston crown may also have a piston trough with a depth t. The piston trough may have a piston trough wall with a base diameter. The piston trough may also have at least one recess with a height h. The height h parallel to the direction of the center axis may satisfy the following requirement: 0.2 t<=h<=t.

Abstract: A piston of an internal combustion engine is disclosed. The piston may have a piston skirt having a central axis. The piston may also have a piston crown delimiting the piston skirt with a diameter D adjacent a top of the piston skirt. The piston crown may have an edge of the piston crown of width b and a piston crown recess of depth t. The piston crown recess may have a piston recess wall with an opening cross section of diameter d. At least one groove with an internal diameter dn may be provided within the edge of the piston crown. The at least one groove may run in a circumferential direction relative to the central axis. The internal diameter dn may be larger than the diameter d.

Abstract: An engine block of an internal combustion engine is disclosed. The engine block may have a piston and at least one gas exchange valve. The piston may have a piston skirt having a first center axis. The piston may also have a piston head delimiting the piston skirt at the top with a diameter D. The piston head may have a piston head edge and a piston head recess with a piston recess wall having a height H. At least one valve pocket may be formed into the piston head edge. The at least one valve pocket may have a valve pocket depth T with respect to the piston head edge. The valve pocket depth T may fulfil the following condition with respect to the wall height H: 0.05 H<=T<=0.5H.

Abstract: A piston for an internal combustion engine is disclosed. The piston may have a piston skirt with a centre axis. The piston may also have a piston crown disposed adjacent a top of the piston skirt. The piston crown may have a diameter D. The piston crown may have a piston crown margin of width b extending in a circumferential direction. The piston crown may also have a piston trough with a depth t. The piston trough may have a piston trough wall with a base diameter. The piston trough may also have at least one recess with a height h. The height h parallel to the direction of the centre axis may satisfy the following requirement: 0.2 t<=h<=t.

Abstract: A piston of an internal combustion engine is disclosed. The piston may have a piston skirt having a central axis. The piston may also have a piston crown delimiting the piston skirt with a diameter D adjacent a top of the piston skirt. The piston crown may have an edge of the piston crown of width b and a piston crown recess of depth t. The piston crown recess may have a piston recess wall with an opening cross section of diameter d. At least one groove with an internal diameter dn may be provided within the edge of the piston crown. The at least one groove may run in a circumferential direction relative to the central axis. The internal diameter dn may be larger than the diameter d.

Abstract: A piston of an internal combustion engine is disclosed. The piston may have a piston sleeve with a centre axis and a piston base with a diameter D delimiting the piston sleeve at a top of the piston sleeve. The piston base may have a piston base rim of width b and a piston bowl with a depth t. The piston bowl may be designed as a pot bowl, which may have a piston bowl base and a piston bowl wall with a maximum diameter d4 adjoining the piston bowl base. The piston bowl may have an opening cross-section aligned symmetrically relative to the centre axis. The opening cross-section may have a minimum diameter da, which is smaller than the diameter d4. A flow cut-off edge designed as a nose may be formed in the opening cross-section and may project in the radial direction inwards over the piston bowl wall.

Abstract: The invention concerns an exhaust gas duct with an exhaust gas guide channel (13) which is placed, leaving an air-filled space (18), in a sheath wherein circulates a cooling liquid and enclosing at least partially said exhaust gas guide channel (13). The invention is characterised in that said sheath is divided along the row of cylinders and has a base body (10b) wherein the exhaust gas guide channel (13) can be inserted, and a cover (3) closing said base body, thereby obtaining a modular structure for transporting exhaust gas which enables continuous control, in particular, control over the exhaust gas guide channel.

Abstract: Expansion screw for tooth adjustment having two expansion screw body members each embeddable in a plastic palate plate, these body members being provided with retention grooves for anchoring in the plastic of these palate plates, also having a threaded spindle and two guide pins, wherein the threaded spindle has spindle sections with opposite threads on either side of a central section, these spindle sections engaging in corresponding threaded bores of the expansion screw body members, and wherein the latter have guide openings for the passage of the guide pins extending parallel to the threaded spindle.