1-3. 최적 압축비 이상으로 증가할 때 오히려 크랭크 축으로 전달되는 torque가 감소하는 이유 ?
압축비를 증가시킴으로써 엔진의 효율을 상승시킬 수 있다. 그러나 압축비를 무한정 높이지 못하는 원인들이 있는데 가솔린 엔진에서 압축비 제한의 가장 주요한 요인은 knocking이다.
연소가 일어날 때 화
Question
Describe the relationship of weight, MSRP, and Engine size with fuelefficiency(both city and highway) in a written report. Be sure to transform the variables if necessary.
The variables
Model of Car
Engine size(L)
Cylinders
MSRP(Manufacturer’s Suggested Retail Price in $)
City(mpg)
Highway(mpg)
Weight(pound)
Type and Country of manufacturer
Mpg by Brand (City)
Aim
Reducing weights
High fuelefficiency
Low fuel consumption
Reduction total amount of CO2 gas
Structure of an automobile
Chassis
Mg-Zn-Zr alloy
Magnesium alloy + Zr
Grain refinement
Mg-Ce alloy
Precipitation Ce on GB at high temp.
High creep strength
Engine parts(Introduction)
Basic engine part
High engine weight ratio
Requir
The Nuts and Bolts of the Prius
The Original Prius
Small, cramped compact, dull design
114 horsepower
(70 from gas engine, 22 from electric motor)
The Second-generation Prius
A modest power increase
An increase in fuelefficiency
Much better looking (Asian-inspired design & seek)
Seven colors
Interior : roomy & practical
Expensive touches
(7inch energy monitor
touch screen)
A Run