e-tron wrote:
個人一點淺見:
1.2t這種要快不快的東西...
還不如油電車的附加價值(低速低噪音,無震動,無廢氣)還比較高
跨界小休旅 引擎室小的要死
換大渦輪或者加bar值不換大水箱嗎? 確定放得下?
1.2t打到滿bar是能多快? 1.2t高速拼尾速是要笑死人嗎?
小休旅跟人跑山路拼操控?? 我怎麼也覺得有點好笑...
不負責任推測一下...1.2t 都會市區油耗估計12~13km/h最多了
但這麼保守開 買渦輪車幹嘛?
不用在那邊個人淺見....看過這顆引擎的技術資料再來說嘴好嗎?
誰說渦輪車就一定很暴力?這顆引擎完全是節能取向開起來根本不像渦輪車
優點是省油省稅金，低bar數增壓符合大眾一般用車習慣
技術資料原文:http://papers.sae.org/2015-01-1268/
此資料是要花錢下載的，花點錢多讀資料吧，這些都是工程人員的心血
其中還提到搭配CVT變速箱能抵銷渦輪遲滯的特性(參考圖29)
Toyota Motor Corporation is developing a series of engines
belonging to its ESTEC (Economy with Superior Thermal Efficient
Combustion) development concept. This paper describes the
development of 8NR-FTS after the subsequent launch of the 2.0-liter
DI Turbocharged 8AR-FTS. 8NR-FTS is a 1.2-liter inline 4-cylinder
spark ignition downsized turbocharged direct injection (DI) gasoline
engine. By following the same basic concepts as 8AR-FTS engine
[1], the 8NR-FTS incorporates various fuel efficient technologies
such as a cylinder head with an integrated exhaust manifold, the
Atkinson cycle using the center-spooled variable valve timing with
mid-position lock system (VVT-iW), and intensified in-cylinder
turbulence to achieve high-speed combustion. Instead of the D-4ST
(Direct injection 4-stroke gasoline engine Superior version with
Turbo) system that incorporates port and direct injection, this engine
adopts the D-4T (Direct injection 4-stroke gasoline engine with
Turbo) system that performs only DI in each cylinder. In combination
with a single-scroll turbocharger, high torque is achieved from low
engine speeds by cooperative control with the VVT system. This
engine also adopts a stop and start control strategy that achieves
speedy and shock-free re-start performance by starting the engine
with stratified injection in the first compressed cylinder. The engine
can be mated with either a 6-speed manual transmission (6MT) or
continuously variable transmission (CVT). Especially with CVT,
turbocharger lag duration is reduced by shifting control, and both funto-drive
dynamic performance and excellent fuel economy are
capable by switching two driving mode; “normal” or “sport”.
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