Abstract: An internal combustion engine has a reservoir containing oil which is circulated through passageways in the engine by an oil pump to lubricate and cool the engine. A tube has a spiral portion located in the reservoir and a cooling liquid, preferably water, is pumped through the tube to cool the heated oil in the reservoir. The water is thus heated and subsequently enters and discharges this heat in a heat receiver which is preferably part of a home-heating system. In a preferred embodiment, the heating system includes a heat pump which is operatively coupled to the heat receiver, the compressor of the heat pump being driven by the engine. In another preferred embodiment, a portion of the engine exhaust pipe extends through the reservoir so that heat from the gases passing through the pipe is at least partially transferred to the oil in the reservoir.

Abstract: A single cylinder internal combustion engine has a piston which drives a crankshaft and flywheel through a connecting rod and has a counterweight arrangement which balances forces produced by the moving engine elements. The counterweight arrangement includes a weight on the crankshaft and two weights on the flywheel which fully balance the forces produced by rotating motion of the engine parts and partially balance the forces produced by reciprocal motion of the engine parts. Two balance shafts are provided which are parallel to and driven synchronously with the crankshaft. The balance shafts have respective first weights thereon which complete the balance of forces produced by the reciprocating motion of engine parts and have respective second weights thereon which balance the moment of the first weights with respect to the axis of the cylinder.

Abstract: A seal for use on a noise-deadening shroud encasing an internal combustion engine, particularly the portion thereof which encases the muffler. A gap is formed between the outlet pipe for the muffler and the wall of the opening in the enclosure for the muffler. A seal is provided for this gap and includes a closure member which surrounds the exhaust outlet pipe with very little clearance therebetween.

Abstract: A drive unit for a compressor which is used in a heat pump. The drive unit includes a fuel-injection internal combustion engine which is coupled with the compressor and a starter associated with said engine and is fed from multiphase electric power supply lines. The starter is connected to the electric power supply by means of a switch. The starter is constructed as an electromagnetic drive motor having a stator and a rotor secured to the engine crankshaft and serving at least partly as a flywheel. The coil windings on the stator are fed current from the power source.

Abstract: A heating system for a building utilizing a heat pump having a condenser which is driven by an internal combustion engine. The internal combustion engine drives an additional aggregate, such as a brake, for the purpose of generating additional heat which is added to the main heat carrier in the heating network in the building. The circulating system for the additional heat generating aggregate is self-contained and separate from the heating network of the building.

Abstract: An internal combustion engine comprising a flywheel mounted on a crankshaft and an aggregate housing which surrounds the flywheel and is mounted on the crank housing by vibration-damping buffer elements extending tangentially of the flywheel, which aggregate housing rotatably supports a drive shaft for an aggregate driven by the engine.

Abstract: To compensate for positional variations during assembly or in use between an engine body or crankcase and a sound-proofing shell enclosing the same, use is made of interposed spring arrangements including a load-setting means.

Abstract: An internal combustion engine having a sound-deadening shroud surrounding the engine block and connected to latter with the interposition of anti-vibration means. An exhaust plant through which combustion gases are connected is arranged external of the shroud and connected to the engine block. A separate enclosure is secured to the shroud and encloses the exhaust plant leaving a small air gap on all sides between the exhaust plant and the enclosure with only the exhaust pipe of the exhaust plant projecting from the enclosure through an opening.

Abstract: A signal indicating device for an internal combustion engine. The internal combustion engine has a sound absorbing shell surrounding the engine body. An air intake pipe is mounted on the engine and an air intake filter is mounted on the inlet end of the air intake pipe. The signalling device is provided to indicate the degree of contamination of the air filter. The signaling device can be a visual signal or an audible signal.

Abstract: A vehicle having a front axle wherein the axle is divided into halves with each half being pivotally supported on a common pivot pin. The pivot pin is mounted at one end to the driving engine and at the other end to a plate which is supported in position by a pair of rod-shaped force transmitting members which are connected to and supported from the driving engine. The force transmitting members effect a reduction in the magnitude of the forces applied to the pivot pin so that the housing structure for the driving engine can be reduced in size and weight.

Abstract: A sound absorbing arrangement for an internal combustion engine having sound absorbing panels encasing the internal combustion engine. Cooling air is drawn in through openings in the paneling to subject the external surface of the engine body to the cooling air. The panels are lined with a sound absorbing material. The sound emitted from the air filter is muffled by arranging the air intake thereto so that it passes first in and around the engine and then through an intake pipe from the chamber defined by the paneling into the air filter.

Abstract: An internal combustion engine having the cylinders thereof arranged in a V-formation and having a sound deadening material jacketing the body of the engine. Two plate-like carriers are gripped between the confronting parts of the cylinder housing and the outwardly projecting rims thereof to constitute a frame which surrounds the engine body from all sides. A plurality of deadening shells conforming to the shape of the engine body bear in sealed fashion against the frame with the interposition of at least one vibration deadening insert. These shells are secured to the body of the engine with the intermediary of spacer elements providing a vibration dampening support.

Abstract: An internal combustion engine having an arrangement for compensating for the pressure in the crankcase of the engine. The arrangement includes a control valve which is arranged so that it is exposed on the one hand to the pressure in the crankcase and on the other hand to the pressure prevailing in an operating chamber which is separate from the connection conduit between the crankcase and the suction pipe and communicates with the atmosphere through an auxiliary conduit.