HEV的电池能用几年？
直喷是不是严重降低发动机寿命？
直喷汽油机和油混车（hev），将军们选哪个？
版主： lexian
#5 Re: 直喷汽油机和油混车（hev），将军们选哪个？
Gasoline Direct Injection (GDI) engines offer several benefits, such as improved fuel efficiency and reduced emissions. However, they also come with some potential drawbacks:
Carbon Build-Up: One of the most significant issues with GDI engines is carbon build-up on the intake valves. Unlike port injection systems, where fuel washes over the valves and helps keep them clean, GDI systems inject fuel directly into the combustion chamber, leaving the intake valves dry and prone to carbon deposits1.
Low-Speed Pre-Ignition (LSPI): This phenomenon occurs when fuel ignites prematurely in the combustion chamber, which can cause knocking and potentially damage the engine. LSPI is more common in GDI engines, especially those with turbochargers2.
Fuel System Clogging: Over time, the high-pressure fuel injectors in GDI systems can become clogged, leading to reduced performance and efficiency3.
Oil Dilution: Fuel can sometimes wash down the cylinder walls and mix with the engine oil, leading to oil dilution. This can reduce the oil’s effectiveness and potentially cause increased engine wear2.
Carbon Build-Up: One of the most significant issues with GDI engines is carbon build-up on the intake valves. Unlike port injection systems, where fuel washes over the valves and helps keep them clean, GDI systems inject fuel directly into the combustion chamber, leaving the intake valves dry and prone to carbon deposits1.
Low-Speed Pre-Ignition (LSPI): This phenomenon occurs when fuel ignites prematurely in the combustion chamber, which can cause knocking and potentially damage the engine. LSPI is more common in GDI engines, especially those with turbochargers2.
Fuel System Clogging: Over time, the high-pressure fuel injectors in GDI systems can become clogged, leading to reduced performance and efficiency3.
Oil Dilution: Fuel can sometimes wash down the cylinder walls and mix with the engine oil, leading to oil dilution. This can reduce the oil’s effectiveness and potentially cause increased engine wear2.
#10 Re: 直喷汽油机和油混车（hev），将军们选哪个？
Toyota's D-4S system is a blended approach to using both port and direct fuel injection to optimize a vehicle's performance, emissions, and economy. D-4S uses two fuel injectors per cylinder: a low-pressure manifold fuel injector and a high-pressure direct fuel injector.
可能是丰田的专利吧 不知道别家会不会跟进
x1
#19 Re: 直喷汽油机和油混车（hev），将军们选哪个？
还真不知道这事，叔只知道cx-5/30/50全上了vdm, 且无法by pass.
这就是叔没考虑Mazda 的原因。
然而最近Mazda 的口碑越来越好也是事实。
看来根源还是在美国组装。
这两年二田把发动机和传动的生产线都搬美国来了
