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A crankcase ventilation system (CVS) removes unwanted gases from the crankcase of an internal combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the inlet manifold). The unwanted gases, called "blow-by", are gases from the combustion chamber which have leaked past the piston rings. Early ...
A crankcase is the housing in a piston engine that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically use a crankcase-compression design, resulting in the fuel/air mixture passing through the crankcase before entering the cylinder(s). This design of the engine does ...
[5]: 44 The use of separate exhaust ports rather than twinned or siamesed ports helps avoid problems with distortion caused by a concentration of heat at these locations. [17] There is a single cast-iron camshaft located in the crankcase. The shaft has only nine cam lobes on it — the symmetrical arrangement of valves allows three double-width ...
Big end bearings seizing up will sometimes lead to a connecting rod breaking and poking out through the crankcase. Several different types of lubrication systems are used. Simple two-stroke engines are lubricated by oil mixed into the fuel or injected into the induction stream as a spray.
The cylinder heads are integrated into the engine block, but the crankcase is separate. [2] Typical 1930-1960 flathead engine with integrated crankcase. The cylinder head is tipped upwards for illustrative purposes. An engine where all the cylinders share a common block is called a monobloc engine. Most modern engines use a monobloc design, and ...
The vent/rollover valve provides a method of controlled escape for gasoline vapors during the refueling process. It has a mechanism which closes the vent in the event the vehicle rolls over, to prevent spilling of VOCs or fuel in general. It also acts as a fill limiter. [8] [dead link ]
The crankcase heater keeps refrigerant at a temperature higher than the coldest part of the system. A crankcase heater generally has the same electrical symbol as a resistor because it converts electricity directly into heat via electrical resistance. The resistance in the heater coil determines the heat it produces when voltage is applied. [1]
A rear-engined Corvette was briefly considered during 1958–60, progressing as far as a full-scale mock-up designed around the Corvair's entire rear-mounted power package, including its air-cooled flat-six, as an alternative to the Corvette's usual water-cooled V8. By the fall of 1959, elements of the Q-Corvette and the Sting Ray Special racer ...