1. Cable terminator (8), in particular outdoor terminator for an electrical cable (10) having a cable conductor (12), a cable insulation (14), a conductive layer (15) and a cable shield (11), the terminator (8) being mounted at one end on a base fitting (20), having means (18) on the base fitting (20) for fastening the cable (10),
having an electrical duct (32) in the interior of the terminator (8),
having a top fitting (70) for fastening an electrical conductor to the duct (32),
having means (30) for electrically connecting the cable shield (11) to earth potential,
having a field control device (34,36) and a field insulating device for the potential transitions at the cable end,
having an insulating body (50) and having means (23) for fastening the insulating body (50) to the base fitting (20), the electrical duct (32) being connected to the cable conductor (12) via contact elements (17,30), characterised in that the contacts (17,30) are designed as clamping elements, in that the insulating body (50) is filled up with material from the region of the fastening (23) to the base fitting (20) up to the level of the contacts (17) and
the filling is reduced towards the top fitting (70), such that an internal cavity (56) is formed, and
the insulating body (50) is designed to take up mechanical load on the terminator (8), and
in that the surface of the insulating body (50) is coated with a voltage-dependent field-controlling layer (64).
2. Cable terminator according to claim 1, characterised in that the field-controlling layer (64) is formed from microvaristors.
3. Cable terminator according to claim 2, characterised in that the microvaristors used are ZnO microvaristors.
4. Cable terminator according to one of the preceding claims, characterised in that the field-controlling layer (64) runs over the entire length of the insulating body (50).
5. Cable terminator according to one of the preceding claims, characterised in that the inner surface (54) of the cavity (56) bears a conductive coating (58).
6. Cable terminator according to one of the preceding claims, characterised in that the insulating body (50) is produced from cast resin.
7. Cable terminator according to one of the preceding claims, characterised in that the electrical duct (32) is designed as a tube.
8. Cable terminator according to one of the preceding claims, characterised in that the contact elements (17) on the cable conductor (14) are laminated contacts.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A precombustion-chamber fuel supply device for a gas internal combustion engine of a Miller-cycle type, comprising:
a main chamber defined between a piston and a cylinder head of the gas internal combustion engine;
a precombustion chamber which communicates with the main chamber via a nozzle and in which fuel gas is combusted by a spark plug;
a gas supply channel to precombustion chamber for supplying the fuel gas to the precombustion chamber from a fuel-gas supply source;
a precombustion-chamber electromagnetic valve which controls the fuel gas flowing out from the fuel-gas supply source to the gas supply channel to precombustion chamber; and
a check valve disposed in the gas supply channel to precombustion chamber and configured to open due to a pressure decrease in the precombustion chamber at a bottom dead center of an intake stroke of a Miller cycle in which the piston closes an intake valve before the bottom dead center of the intake stroke so as to allow supply of the fuel gas to the precombustion chamber,
wherein the gas supply channel to precombustion chamber includes a check-valve insertion hole in which the check-valve is disposed and a flow-channel space defined inside a fuel-inlet connector which extends in a direction orthogonal to a center line of the check-valve insertion hole, the fuel-inlet connector being connected to the fuel-gas supply source via the precombustion-chamber electromagnetic valve.
4. The precombustion-chamber fuel supply device for a gas internal combustion engine according to claim 1,
wherein the check valve includes:
a check-valve body disposed in the check-valve insertion hole of the gas supply channel to precombustion chamber so as to define a check-valve upper chamber and a check-valve lower chamber in the check-valve insertion hole, the check-valve body including a through hole penetrating from the check-valve upper chamber to the check-valve lower chamber inside the check-valve body and a seal portion formed on a periphery of an opening of the through hole adjacent to the check-valve lower chamber;
a valve body including a column portion fitted into the through hole, a valve-body top portion formed on an end of the column portion adjacent to the valve-body lower chamber, and a stopper portion formed on an end of the column portion adjacent to the valve-body upper chamber; and
an elastic member which presses the valve-body top portion against the seal portion.
5. The precombustion-chamber fuel supply device for a gas internal combustion engine according to claim 4,
wherein a pressing force W of the elastic member is within a range of a following expression (1):
Q2\xd7Sa\u2212Q1\xd7Sb>W \u2003\u2003(1)
, where Q1 is a gas pressure in the precombustion chamber at the bottom dead center in the intake stroke; Q2 is a fuel-gas pressure of the gas supply channel to precombustion chamber; Sa is a fuel-gas pressure receiving area of the valve body; and Sb is a precombustion-chamber gas pressure receiving area of the valve body.
6. The precombustion-chamber fuel supply device for a gas internal combustion engine according to claim 1,
wherein a fuel-gas pressure of the gas supply channel to precombustion chamber is set to be lower than a gas pressure of the precombustion chamber in an exhaust stroke.
7. The precombustion-chamber fuel supply device for a gas internal combustion engine according to claim 4,
wherein the check-valve body further includes a plurality of communication channels each of which communicates with the through hole in a vicinity of the check-valve lower chamber and has an opening toward the check-valve upper chamber, the plurality of communication channels being disposed on an outer side of an outer circumferential rim of the through hole.