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US 8,088,036 B2Granted
Drive control device for vehicle
AssigneeJtekt Corporation
InventorsRobert Fuchs, Yasuhiko Hasuda
Life of this patent
Estimating the term…
Abstract
A vehicle drive control device includes a continuously variable transmission mechanism (hereinafter referred to as CVT (6) of a torque control type capable of continuously varying a transmission gear ratio, and a controller (34) which controls operations of the CVT (6) and an engine (2). The controller (34) includes a first control section (43; 43A) which controls a torque of the CVT (6) based on a target transmission input torque (TTRN,T), and a second control section (44) which controls a torque of the engine (2) based on a target engine rotation speed (ωe,T).
Claims20
A vehicle drive control device comprising:
- a CVT mechanism that is capable of continuously varying a transmission gear ratio;
- a controller which controls operations of the CVT and an engine, wherein the controller includes a first control section which controls a torque of the CVT based on a target transmission input torque, and a second control section which controls a torque of the engine based on a target engine rotation speed;
- an input disk and an output disk biased toward each other;
- a roller disposed in a toroidal space defined between the input disk and the output disk for torque transmission between the input disk and the output disk;
- a carriage rotatably supporting the roller;
- and
- a hydraulic cylinder having first and second hydraulic chambers which generate a pressure difference to apply a force to the roller through the carriage for pushing and pulling the input disk and the output disk,
- wherein the first control section includes a demanded pressure difference setting section which determines a demanded pressure difference between the first and second hydraulic chambers to eliminate a difference between the target transmission input torque and an actual transmission input torque,
- further wherein the first control section further includes a target transmission input torque correcting section which corrects the target transmission input torque to eliminate the difference between the target transmission input torque and the actual transmission input torque,
- further wherein the demanded pressure difference setting section determines the demanded pressure difference based on a corrected transmission input torque applied from the target transmission input torque correcting section.
7 more elements
A vehicle drive control device comprising:
- a CVT mechanism that is capable of continuously varying a transmission gear ratio;
- and
- a controller which controls operations of the CVT and an engine, wherein the controller includes a first control section which controls a torque of the CVT based on a target transmission input torque, and a second control section which controls a torque of the engine based on a target engine rotation speed,
- wherein the second control section includes a demanded engine torque setting section which sets an engine torque Te computed based on the following expression as a demanded engine torque Te,D:
- Te=Ie×ω′e,AT+TTRN,R
- ω′e,AT=k3×(ωe,T−ωe)
- wherein
- Ie:
- engine inertia
- k3:
- control grain
- ωe,T:
- target engine rotation speed
- ωe:
- actual engine rotation speed
- TTRN,R:
- actual transmission input torque.
14 more elements
A vehicle drive control device comprising:
- a CVT mechanism that is capable of continuously varying a transmission gear ratio;
- and
- a controller which controls operations of the CVT and an engine, wherein the controller includes a first control section which controls a torque of the CVT based on a target transmission input torque, and a second control section which controls a torque of the engine based on a target engine rotation speed,
- wherein the controller which controls the operations of the CVT and the engine includes a driver's demand converting section which determines a state quantity which provides a vehicle driving state demanded by a driver, and
- wherein the driver's demand converting section computes the target engine rotation speed and the target transmission input torque which impart the engine with a maximum efficiency as the target engine rotation speed and the target transmission input torque based on an accelerator operation amount detected by accelerator operation amount detecting means and a vehicle speed detected by vehicle speed detecting means.
2 more elements
A vehicle drive control device comprising:
- a CVT mechanism that is capable of continuously varying a transmission gear ratio;
- and
- a controller which controls operations of the CVT and an engine, wherein the controller includes a first control section which controls a torque of the CVT based on a target transmission input torque, and a second control section which controls a torque of the engine based on a target engine rotation speed,
- wherein the controller which controls the operations of the CVT and the engine includes a driver's demand converting section which determines a state quantity which provides a vehicle driving state demanded by a driver,
- wherein the driver's demand converting section determines the target transmission input torque and the target engine rotation speed as the state quantity,
- wherein the target transmission input torque determined by the driver's demand converting section is outputted to the first control section,
- wherein the target engine rotation speed determined by the driver's demand converting section is outputted to the second control section.
4 more elements
Dependencies are inferred from the claim text.