Transmission input shaft speed detecting apparatus utilizing oil pump pressure
AssigneeJATCO Ltd
InventorMichio Asada
Life of this patent
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Abstract
An apparatus for use with a transmission including an input shaft, and an oil pump rotatable in synchronism with the input shaft to detect a speed of rotation of the input shaft. The apparatus comprises a pressure sensor sensitive to an oil pressure discharged from the oil pump for producing an electrical signal indicative of a sensed pressure. The electrical signal is utilized to detect the input shaft rotation speed.
Claims4
An apparatus for use with a transmission including an input shaft, and an oil pump including a rotor having a number of vanes rotatable in synchronism with the input shaft to detect a speed of rotation of the input shaft, the apparatus comprising:
- first means sensitive to an oil pressure discharged from the oil pump for producing an electrical signal having pulses caused by variations in a sensed oil pressure;
- and
- second means for calculating the input shaft rotation speed based upon the electrical signal.
An apparatus for use with a transmission including an input shaft, and an oil pump including a gear wheel having a number of gear teeth rotatable in synchronism with the input shaft, the apparatus comprising:
- first means sensitive to an oil pressure discharged from the oil pump for producing an electrical signal having pulses caused by variations in a sensed oil pressure;
- and
- second means for calculating the input shaft rotation speed based upon the electrical signal.
Dependencies are inferred from the claim text.