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Crankcase dilution is a phenomenon of internal combustion engines in which unburned diesel or gasoline accumulates in the crankcase.Excessively rich fuel mixture or incomplete combustion allows a certain amount of fuel to pass down between the pistons and cylinder walls and dilute the engine oil.
Poorly controlled and incomplete combustion can cause higher levels of emissions and lower engine efficiencies. In order to optimize combustion processes, engine designers have traditionally undertaken manual engine modifications, conducted testing, and analyzed the results. This iterative process is painstakingly slow, costly, and does not ...
Internal combustion engines such as reciprocating internal combustion engines produce air pollution emissions, due to incomplete combustion of carbonaceous fuel. The main derivatives of the process are carbon dioxide CO 2, water and some soot—also called particulate matter (PM). [55]
Gasoline direct injection (GDI), also known as petrol direct injection (PDI), [1] is a mixture formation system for internal combustion engines that run on gasoline (petrol), where fuel is injected into the combustion chamber. This is distinct from manifold injection systems, which inject fuel into the intake manifold (inlet manifold).
Scavenging is the process of replacing the exhaust gas in a cylinder of an internal combustion engine with the fresh air/fuel mixture (or fresh air, in the case of direct-injection engines) for the next cycle. If scavenging is incomplete, the remaining exhaust gases can cause improper combustion for the next cycle, leading to reduced power output.
The engine had one crankshaft and is very similar in concept to the EcoMotors OPOC engine design, except using a camshaft and valves, and not in opposed-cylinder configuration. The OPOC engine can be moduled with two, or more, engines coupled via an electric clutch between engines. When more power is needed the second engine is clutched in.
Electric motor can start the engine with vehicle in gear making take-off with stalled combustion engine smooth and instantaneous. [10] 48V starter-generator can also be mounted differently and be uncoupled from combustion engine by transmission or clutch. This might allow 48V electric motor move the vehicle without starting combustion engine.
The engine compressed the air/fuel mixture before combustion, unlike the other atmospheric engines of the time. The engine was a single-cylinder unit that displaced 6.1 dm 3 , and was rated 3 PS (2,206 W) at 180/min, with a fuel consumption of 0.95 m 3 /PSh (1.29 m 3 /kWh).