Si Units - Toyota 8FBCU 20 Repair 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
2
Force*
*2
Torque
(Moment)
2
Pressure*
↑
Revolving speed
2
Spring constant*
Volume
Power
Heat quantity
Specific fuel
consumption
<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.
New unit Conventional unit
N (newton) kgf
N·m kgf·cm
Pa (pascal)
kgf/cm
↑
mmHg
rpm rpm
N/mm kgf/mm
l cc
W PS system
W·h cal
g/W·h g/PS·h
Conversion rate*
1 kgf = 9.80665 N
1 kgf·cm = 9.80665 N·m
2 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
1
(1 [conventional unit] = X [SI unit])
0-7