Hybrid drive & ICE
Hybrid drive & ICE
(OP)
how does the Prius drivetrain allow the engine to start while not allowing the wheels to turn? As far as I am aware the engine is constantly engaged to the wheels via a planetary gear so how does it do this?
Much obliged!
Much obliged!





RE: Hybrid drive & ICE
To start the engine MG2 is locked (more accurately maintains zero speed), so MG1 drives the engine , acting as a starter.
To move off MG2 provides forward torque, and the engine speed is matched to the road speed by varying the speed of MG1. The engine speed is set by the demand power, as it tries to keep to a specific rpm for a given demand power. Therefore electrical power is transferred between the two MGs as necessary in order to provide this speed and torque matching.
Incidentally so far as I know this rather cunning use of a diff as a CVT, with two MGs, was originally proposed in the 70s by a couple of American researchers.
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: Hybrid drive & ICE
With this in mind surely the locked MG2 would stop the engine from turning?
RE: Hybrid drive & ICE
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: Hybrid drive & ICE