Si Units - Toyota 7FBEST 10 Manual

SI UNITS

Meaning of SI
This manual uses SI units. SI represents the International System of Units, which was established to unify
the various systems of units used in the past for smoother international technical communication.
New Units Adopted in SI
Item New unit
2
Force* N (newton)
*2
Torque
(Moment)
2
Pressure*
2
Pressure* Pa (pascal)
↑
Revolving speed
Spring con- N/mm
Volume
Power
Heat quantity
Specific fuel g/W·h
<Reference>
* 1: X represents the value in SI units as converted from 1 [in conventional units], which can be
used as the rate for conversion between conventional and SI units.
* 2: In the past, kilogram [kg] representing mass was often used in place of weight kilogram [kgf],
which should be used as the unit of force.
Conversion between Conventional and SI Units
Equation for conversion
Value in SI unit = Conversion rate × Value in conventional unit
Value in conventional unit = Value in SI unit ÷ Conversion rate
When converting, change the unit of the value in conventional or SI units to the one in the
conversion rate column in the table above before calculation. For example, when converting 100 W
to the value in conventional unit PS, first change it to 0.1 kW and divide by the conversion rate
0.735499.
Conventional
unit
kgf
N·m kgf·cm
2
Bar kgf/cm
2
kgf/cm
↑
mmHg
rpm rpm
kgf/mm
l cc
W PS system
W·h cal
g/PS·h
1
Conversion rate* (1 [conventional unit] = X [SI
unit])
1 kgf = 9.80665 N
1 kgf·cm = 9.80665 N·m
2
1 Bar = 1 kgf / cm
2
1 kgf/cm = 98.0665 kPa = 0.0980665 MPa
1 mmHg = 0.133322 kPa
1 rpm = 1 r/min
1 kgf/mm = 9.80665 N/mm
1 cc = 1 ml
1 PS = 0.735499 kW
1 kcal = 1.16279 W·h
1 g/PS·h = 1.3596 g/kW·h
Conversion rate: Figure corresponding
to X in the conversion rate column in
the table above
0-7