Method and device for synchronising an idler pinion of a gearbox with the shaft thereof
AssigneeRENAULT s.a.s.
InventorAbdelmalek Maloum
Life of this patent
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Abstract
The invention relates to a method for synchronising the common speed (ω p) of two concentric primary shafts (1, 6) of a hybrid transmission in a hybrid operating mode wherein said two shafts are rotatably connected by a first coupling means (5), with the speed (ω s) of a secondary transmission shaft (10) comprising at least one idler pinion for allowing the coupling of one of said pinions (11, 12) to the shaft (10) thereof by closing a second coupling means (13) that does not have mechanical synchronisation bodies, the torque (Te) of the electric machine being temporarily reduced during the synchronisation phase in order to meet the conditions of a perfect coupling when the value thereof caps at an upper limit value (Temax) or a lower limit value (Temin).
Claims13
A synchronizing method of synchronizing a speed (ωp) common to two concentric primary shafts of a hybrid transmission cumulatively receiving torque (Tice) from a combustion engine and torque (Te) from an electric machine in a hybrid mode of operation in which the two concentric primary shafts are rotationally connected by a first coupling, with the speed (ωs) of a secondary transmission shaft bearing at least one idler pinion, to allow one of the at least one pinion to be coupled to the secondary transmission shaft by closure of a second coupling with no mechanical synchronizing members, the method comprising:
- temporarily reducing, via processing circuitry, the torque (Te) of the electric machine during the synchronizing phase to meet the conditions for perfect coupling when the torque (Te) reaches a ceiling represented by an upper limit value (Temax) or a lower limit value (Temin).
A device comprising:
- processing circuitry configured to adjust a magnitude of torque (Tice) supplied by a combustion engine thereby synchronizing a speed (ωp) common to two concentric primary shafts of a hybrid transmission cumulatively receiving the torque (Tice) from the combustion engine and torque (Fe) from an electric machine in a hybrid mode of operation in which the two concentric primary shafts are rotationally connected by a first coupling, with the speed (ωs) of a secondary transmission shaft bearing at least one idler pinion, to allow one of the at least one pinion to be coupled to the secondary transmission shaft by closure of a second coupling with no mechanical synchronizing members.
Dependencies are inferred from the claim text.