LPGK pisze:Witam wszystkich.
Czy ktoś ma konkretne informacje odnośnie wtrysku PB w tym aucie czy w każdej wersji/roczniku ma on bezpośredni jednopuntkowy wtrysk
Czytałem iż były wersje z pośrednim wtryskiem ale chciałbym doinformawać się w tym temacie, więc jeśli ktoś posiada jednoznaczne informacje na ten temat byłbym wdzięczny za ich udzielenie - za co z góry dziękuję.
Pozdrawiam.
Proszę kolego
Były tylko z bezpośrednim.
EFI D-4
The newly developed 4GR-FSE D-4 (Direct injection 4-stroke gasoline engine) is a 2.5-liter, 24-valve
DOHC V6 engine. This engine uses a Direct injection system, Dual VVT-i (Variable Valve
Timing-intelligent) system, DIS (Direct Ignition System), ACIS (Acoustic Control Induction System),
Electronic SCV (Swirl Control Valve) and ETCS-i (Electronic Throttle Control System-intelligent). These
control functions achieve improved engine performance, fuel economy, and clean emissions.
— REFERENCE—
D-4 (Direct injection 4-stroke gasoline engine) System
D Anengine equipped with a D-4 system has the injector installed on the combustion chamber, which injects
the fuel pressurized in the fuel pump (high pressure) directly into the combustion chamber. Due to the
injection directly in the cylinder, it is possible to increase the compression ratio. It is possible to increase
the compression ratio due to direct injection taking advantage of the “latent heat of vaporization*” of the
fuel. This principle results in a cooling effect on the compressed mixture. The lower temperature of the
compressed mixture reduces the tendency of the mixture to detonate or preignite in the engine. The
increased compression ratio of the engine results in improved power output.
D Aconventional gasoline EFI engine has the injector installed in the intake port and the air and fuel injected
inside the intake port are drawn into the cylinder by the intake stroke of the piston.
D In the D-4 system, a slit nozzle type injector precisely controls the quantity of the high pressure fuel and
produces a fine-grain atomization to thus improve the fuel efficiency.
* Latent heat of vaporization is an effect that results in a temperature drop when a liquid changes from a
liquid to a gas. An example is the cooling effect produced when alcohol evaporates from skin, or when
liquid refrigerant changes to a gas.
Depending on the driving conditions, by injecting the fuel at an optimal time during the intake stroke, an
equal air-fuel mixture (homogenous mixture) is produced.
D When the engine is cold, fuel is injected at the end of the compression stroke. Due to the combustion time
being lengthened by providing a leaner mixture, the exhaust temperature is raised to accelerate engine and
catalyst warm-up. Catalysts that are warmed up earlier accelerate exhaust emission purification.
