Abstract: A protection system for internal combustion systems which indicates and alarms the loss of coolant liquid which it detects as a pressure drop at higher temperatures, and then sets off an alarm.

Abstract: A throttle valve control system comprises an accelerator position sensor for detecting the amount of operation of the accelerator, a throttle valve opening degree determining circuit which receives the output of the accelerator position sensor and determines the opening degree of the throttle valve, and a throttle valve driving device which drives the throttle valve to the position corresponding to the opening degree determined by the throttle valve opening degree determining circuit. The throttle valve opening degree determining circuit is arranged to determine the opening degree of the throttle valve with respect to the amount of operation of the accelerator so that the change in the opening degree of the throttle valve for a given change in the amount of operation of the accelerator is relatively small when the amount of operation of the accelerator is in an intermediate range and is relatively large when the amount of operation of the accelerator is above or below the intermediate range.

Abstract: Cooling system, particularly for vehicle engines, includes a coolant circulation pump (21) and a cooling fan (20) typically coacting with a radiator (14) both driven by a common variable speed motor (18) whereby both the pump and fan can be operated at lower and higher speeds in response to the sensed temperature levels of the coolant.

Abstract: An apparatus responsive to a change in the position of an accelerator pedal for controlling movement of a throttle valve situated within an engine induction passage. The apparatus includes a control circuit for determining a demand value corresponding to a setting of the position of the throttle valve in response to an electrical signal indicative of the position of the accelerator pedal. The calculated demand value is modified whenever the speed of movement of the throttle valve exceeds an upper limit determined in accordance with transmission gear position.

Abstract: A viscous fan coupling unit is controlled by a bimetallic strip. The bimetallic strip is subdivided by an elongate slot into two partial strips. The partial strips are interconnected by end portions of the bimetallic strip and by a cross-piece. The cross-piece acts on a control pin of the viscous fan coupling. This bimetallic stream reacts immediately on temperature changes of the air strip passing around the bimetallic strip. By the slot internal stresses are avoided such that the bimetallic strip can provide larger deflection paths and larger control forces in response to temperature changes.

Abstract: An internal combustion engine of an automotive vehicle has a cylinder block formed with a cylinder bore, and a piston is fitted in the bore and reciprocates in it. A cylinder head is affixed to the cylinder block and defines a combustion chamber in cooperation with the piston and the cylinder bore. This cylinder head is formed with a portion which in cooperation with a portion of the piston defines a squish area of the combustion chamber, and with a coolant passage which substantially follows through the cylinder head adjacent to the squish area so as directly to cool the squish area. The coolant passage is of substantially the same cross sectional area along its extent. Thereby, the flow of coolant through the coolant passage is kept substantially uniform and at uniform speed throughout its extent, and cooling of the squish area is enhanced.

Abstract: A cylinder head for an automotive vehicle has an inner wall serving to define the roofs of combustion chambers, and an outer wall spaced outward therefrom. A coolant flow plenum is defined between the inner wall and the outer wall, and a coolant flow path is defined through the coolant flow plenum. A hole through a portion of the outer wall of the cylinder head opens to a portion of the coolant flow path which has a relatively large cross sectional area, and serves for extracting an inner casting sand core used to create the coolant flow plenum during casting of the cylinder head. A cup plug is fitted into the casting sand extraction hole so as to block it, and this cup plug projects inwards into the coolant flow plenum so as to constrict the large cross section portion of the coolant flow path and to deflect flow of coolant toward other portions of the cylinder head that require high cooling.

Abstract: An apparatus for cooling the cylinder head of an engine including a plurality of recesses formed in the cylinder head at the position located above the combustion chambers to accumulate oil therein and covers adapted to cover the recesses. Oil accumulated in the recesses serves to cool the cylinder head and the covers inhibit oil from being scattered from each of the recesses.

Abstract: A mechanism for lighting an article of furnishing, such as a bookcase with adjustable shelves, comprising a fixture laterally extending along a shelf, said shelf being adjustably positionable along a combination electrical conductor and shelf positioner, said fixture including an electrically conductive strip, a plurality of series connected electrical terminals, and a plurality of lamp means, each connecting said strip and one of said terminals.

Abstract: Method and apparatus for cooling the cylinder head of an engine of the type in which oil is delivered to the area located above the combustion chambers in the cylinder head and the latter is cooled by thus delivered oil. Oil introducing means through which oil is introduced into the area located above the combustion chambers in the cylinder head are disposed in the vicinity of ignition plug fitting bosses on the cylinder head whereby oil pumped up from the oil supplying device is delivered to the area located above the combustion chambers in the cylinder head through the oil introducing means.

Abstract: A closed-deck cylinder block of a light alloy such as an aluminum alloy for use in a water-cooled internal combustion engine includes a cylinder-defining portion having a plurality of cylinder bores defined therein, and a crankcase-defining portion integral with the cylinder-defining portion. The cylinder-defining portion includes a water jacket extending substantially the entire length of each of the cylinder bores and defined by an inner side wall, and outer side wall spaced therefrom, and a bottom wall interconnecting the inner and outer side walls. The bottom wall has a wall thickness substantially equal to at least one of the wall thicknesses of the inner and outer side walls. The wall thicknesses of the inner and outer side walls are substantially equal to each other.

Abstract: In order to prevent large amounts of liquid coolant from boiling over from a coolant jacket of an evaporative cooling system wherein coolant vapor is used as a vehicle for removing heat from the engine to the condenser in which the coolant vapor is condensed, a vapor manifold is arranged to collect any liquid coolant before it reaches the radiator and return same to a relatively cool section of the coolant jacket.

Abstract: A cooling structure for an engine in a straddled type vehicle provided with steerable left and right front wheels and an engine positioned at the center in a forth-back direction of a vehicle body is improved in that a cooling fan is disposed in front of the engine and an engine radiator is disposed contiguously to an upper half section of the cooling fan.

Abstract: An induction system for an internal combustion engine for improving running throughout the entire engine speed and load ranges. The induction system comprises a first intake passage that serves the chamber through a first intake port and a second intake passage that serves the chamber through second and third intake ports. The effective cross-sectional area of the first intake passage is substantially smaller than that of the second intake passage and staged throttle valves are incorporated so that the charge requirements at low speed are supplied primarily through the first intake passage.

Abstract: A cylinder block and head assembly for use in an internal combustion engine includes a closed-deck cylinder block having a deck and a water jacket, a cylinder head mounted on the deck and having a water jacket, and a gasket interposed between the cylinder block and the cylinder head. Communication passages are defined in the cylinder block, the cylinder head, and the gasket and provide communication between the water jackets in the cylinder block and the cylinder head. Recesses are defined adjacent to the communication passages and between the cylinder block and the cylinder head for increasing the pressure on the surfaces of the gasket between the cylinder block and the cylinder head through a reduction in the area of contact between the gasket surfaces and the cylinder block and head. In alternate embodiments the gasket or the cylinder block has holes providing communication between the recesses and the communication passages.

Abstract: A liquid-cooled engine of the vertical shaft type has a row of left and right side cylinders arranged in a V-shape as viewed from the above. The cooling water jackets of the left and right side cylinders are connected to each other at the highest ends of the cooling water jackets at the sides of cylinder heads of the cylinders through a communicating passage, a thermostat chamber is provided at the highest end of the cooling water jacket of one of the cylinder heads which is located lower than the other cylinder head, the communicating passage being connected at its one end to the thermostat chamber.

Abstract: A blow-by gas processing arrangement for an internal combustion engine includes a cylinder block having a chamber for collecting a blow-by gas, a blow-by gas passage communicating with the chamber, and a plurality of spaced journal walls for supporting a crankshaft. A relatively large oil mist separating passage is defined in the cylinder block and extends into one of the journal walls, the oil mist separating passage communicating with the blow-by gas passage for preliminarily separating an oil mist from the blow-by gas supplied from the chamber. The blow-by gas processing device also includes an oil separator communicating with the oil mist separating passage for separating an oil mist from the blow-by gas supplied from the oil mist separating passage, a PCV valve connected to the oil separator, and an intake manifold connected to the PCV valve.

Abstract: A cooling system has a first passage communicating an outlet of water jackets with an inlet of a radiator, a second passage communicating an outlet of the radiator with an inlet of a water pump, and a bypass connected between the first passage and a thermostat housing. A thermostat comprising a thermo-sensitive device and a valve is disposed in the second passage, so that the valve closes the second passage. The thermo-sensitive device is disposed in the bypass, so that the thermo-sensitive device is exposed to coolant passing the bypass.

Abstract: A compact generator unit including a cooling system in which the engine and generator are mounted at points outside of the perimeter of the generator fan such that the generator fan serves to cool both the generator and the engine.

Abstract: In an internal combustion engine cooling system wherein the coolant is boiled and the vapor produced condensed in a radiator in a manner that the rate of condensation under light engine load is maintained at a level sufficiently low to raise the pressure within the system and thus raise the boiling point of the coolant while under heavy load increased to the point of lowering the pressure in the system and thus lower the coolant boiling point, an arrangement is provided to reduce the heat exchange capacity of the radiator when the rate of condensation therein due to uncontrollable external influences becomes excessive. When the engine is stopped, coolant is admitted to fill the system. To purge any air or like non-condensible which finds its way into the system, liquid coolant is pumped in to overfill the system and flush same out during engine warm-up.