A variable compression ratio engine has a compression ratio varying mechanism, which moves a cylinder block relative to a lower case. The rotational driving force of a servo motor is transmitted to vertical sliding movements of the cylinder block by means of cam shafts with eccentric cams. First and second rows of spring members and are arranged on both sides of the cylinder block. The resultant spring force of the first and second spring members is applied to the cylinder block and the lower case. The resultant spring force works to reduce the transmission torque of the rotational driving force of the servo motor and assist the compression ratio varying mechanism to vary a compression ratio of the engine. The technique simplifies the control procedure of varying the compression ratio of the engine and reduces the size of the mechanism required.

Internal combustion engine with variable compression ratio and compression ratio control method

An internal combustion engine (1) whose compression ratio is variable by moving a cylinder block and a crank case relative to each other in the axial direction of a cylinder is installed on a vehicle body member (29) at at least two sections that are a first mount section (32) provided on a transmission device and a second mount section (31) provided on the engine (1), the installation being made with the second mount section (31) mounted on the crank case (4). Further, the first mount section (32) and the second mount section (31) are set such that the direction of rotational moment (TD), produced by combustion and acting on the engine (1), working about an output shaft (RC1) of the transmission device is opposite the direction of rotational moment (M1), produced by force acting on the cylinder block (3) when a compression ratio is changed, working about the output shaft (RC1).

Mount device for variable compression ratio internal combustion engine

A mud motor radial bearing, a combination flow diverter and integral radial mud motor bearing, and a mud motor bearing assembly including the combination. The flow diverter includes a body defining threaded box ends, a concentric longitudinal bore, a generally cylindrical outer surface, and a longitudinal axis. The longitudinal bore fluidly connects the first and second threaded box ends. The first threaded box end connects to a pin of a transmission of a mud motor rotor, and the second threaded box end connects to a pin of a mandrel. A portion of the generally cylindrical outer surface of the body in a region of the second threaded box end has bonded thereto a bearing material. The bearing material includes a plurality of tungsten carbide portions surrounded by a hard metal alloy matrix binder.

Combination mud motor flow diverter and tiled bearing, and bearing assemblies including same

An internal combustion engine 1 in which the compression ratio can be varied by moving a cylinder block and a crankcase along the axial direction of the cylinder is mounted on a vehicle body member 29 by at least two portions including a first mount portion 32 provided on a transmission apparatus to and a second mount portion 31 provided on the internal combustion engine 1 , wherein said second mount portion 31 is provided on the crankcase 4  The first mount portion 32 and the second mount portion 31 are arranged in such a way that the direction of a rotation moment TD about the output shaft RC 1 of the transmission apparatus acting on the internal combustion engine 1 upon combustion becomes opposite to the direction of a rotation moment M 1 about the output shaft RC 1 generated by a force acting on a cylinder block 3 upon changing the compression ratio

Mount apparatus for variable compression ratio internal combustion engine

A device seating a valve body with the aid of an urging force of a spring by stopping the operation of a pump, changes over an energization state of a coil of at least one of the liquid shutoff valves which is changed over to the closed-valve state where the coil is energized, and then resumes the operation of the pump Upon detecting the start of operation of the pump, a valve control unit causes a pump control unit to perform opening-closing force-feed control, where an amount of the cooling liquid force-fed by the pump is set to an amount within such a range that the valve body of the liquid shutoff valves whose coil is energized is not displaced in a valve-opening direction while the valve body of the liquid shutoff valves whose coil is not energized is displaced in the valve-opening direction

Cooling liquid circulation device for internal combustion engine

A pump arrangement is intended to form part of a cooling system (1) for a combustion engine (2), in which a pump (14), via a thermostat valve (19), circulates coolant between the engine and a radiator (4). The thermostat valve and the pump are arranged in a common housing (39) intended for mounting on the engine. At least one outlet (11) and one inlet (12) for coolant are arranged next to one another in the housing for direct connection to the engine. Furthermore, the housing (39) has outlets and inlets for connection of flow line and return line to at least one extra coolant consumer (5-8) in addition to the radiator, and, for each such extra consumer, a valve (26) for adjusting the flow of coolant to this consumer is arranged in the housing.

Pump arrangement for a coolig system for a combustion engine

Internal combustion engine with variable compression, comprising a crankshaft-bearing crankcase part (2) and a cylinder-receiving part (6) arranged tiltably thereon by means of a tilt axle bearing (8) on one side of the engine and a tilt mechanism (10) on the other, opposite side of the engine, which cylinder-receiving part (6) supports a cylinder head (14) which is securely connected thereto, preferably with camshafts mounted therein. Arranged between the crankcase part (2) and the cylinder-receiving part (6) there are prestressing members (38) which force these engine parts apart and work to counteract the occurrence of bearing play in the tilt axle bearing (8) and in the tilt mechanism (10) when compression-modifying tilting movement between the cylinder-receiving part (6) and the crankcase part (2) occurs during running of the engine.

Arrangement for preventing bearing-related noise in internal combustion engines

Verbrennungsmotor
mit variabler Kompression, mit einem Kurbelwellenlager aufweisenden Kurbelgehauseteil
(2) und einem Zylinder aufnehmenden Teil (6), der mittels eines
Kippachsenlagers (8) auf einer Seite des Motors und eines exzentrischen
Kippmechanismus (10) auf der anderen, gegenuberliegenden Seite des Motors
kippbar angeordnet ist, dessen Zylinder aufnehmender Teil (6) einen
Zylinderkopf (14) tragt,
der mit diesem fest verbunden ist, vorzugsweise mit darin angebrachten
Nockenwellen, dadurch gekennzeichnet, dass zwischen dem Kurbelgehauseteil
(2) und dem Zylinder aufnehmenden Teil (6) vorspannende Bauteile
(38; 50) angeordnet sind, die diese Motorteile auseinanderdrucken und
dem Auftreten eines Lagerspieles in dem Kippachsenlager (8) und
dem Kippmechanismus (10) entgegenwirken, wenn eine kompressionsmodifizierende
Kippbewegung zwischen dem Zylinder aufnehmenden Teil (6) und dem
Kurbelgehauseteil
(2) bei laufendem Motor auftritt.

Drangel Hans

Papers

Pump arrangement for a coolig system for a combustion engine

Arrangement for preventing bearing-related noise in internal combustion engines

Anordnung zum Verhindern von mit Lagern zusammenhängenden Geräuschen bei Verbrennungsmotoren