Vehicle control device

• US 8,965,654 B2
• Filed: 02/03/2012
• Issued: 02/24/2015
• Est. Priority Date: 02/03/2012
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ito, Yoshio, Yokokawa, Takahiro, Yamanaka, Satoshi
• Primary Examiner(s): Wright, Dirk
• Application Number:
  US14/235,566
• Publication Number:
  US 20140172257A1
• Time in Patent Office: 1,117 Days
• Field of Search: None
• US Class Current: 701/68
• CPC Class Codes: F16D 2500/1026 Hydraulic
• CPC Class Codes: F16D 2500/10412 Transmission line of a vehicle
• CPC Class Codes: F16D 2500/1045 Friction clutch
• CPC Class Codes: F16D 2500/3024 Pressure
• CPC Class Codes: F16D 2500/3108 Vehicle speed
• CPC Class Codes: F16D 2500/3111 Standing still, i.e. signal detecting when the vehicle is standing still or bellow a certain limit speed
• CPC Class Codes: F16D 2500/3165 Using the moment of inertia of a component as input for the control
• CPC Class Codes: F16D 2500/50239 Soft clutch engagement
• CPC Class Codes: F16D 2500/5029 Reducing drag torque
• CPC Class Codes: F16D 2500/50293 Reduction of vibrations
• CPC Class Codes: F16D 2500/5085 Coasting
• CPC Class Codes: F16D 2500/70406 Pressure
• CPC Class Codes: F16D 2500/7041 Position
• CPC Class Codes: F16D 2500/70414 Quick displacement to clutch touch point
• CPC Class Codes: F16D 48/02 Control by fluid pressure
• CPC Class Codes: F16D 48/06 Control by electric or electronic means, e.g. of fluid pressure
• CPC Class Codes: F16D 48/066 Control of fluid pressure, e.g. using an accumulator F16D48/062, F16D48/068 take precedence
• CPC Class Codes: Y02T 10/60 Other road transportation technologies with climate change mitigation effect

Abstract

A vehicle control device includes an engine and a clutch configured to connect and disconnect a power transmission path between the engine and a drive wheel according to a supplied hydraulic pressure. The vehicle control device is configured to carry out neutral control that controls the hydraulic pressure supplied to the clutch to an N control study value for placing the clutch in a semi-engaged state while a vehicle stops and inertia control (free-run control, deceleration eco-run control, and N inertia control) that carries out an inertia travelling by releasing the clutch while the vehicle travels. At the time that the inertia control is executed, the vehicle control device controls the hydraulic pressure supplied to the clutch to the same value as the N control study value.

Claims

1. A vehicle control device comprising:

an engine; and

a clutch configured to connect and disconnect a power transmission path between the engine and a drive wheel according to a supplied hydraulic pressure, wherein

the vehicle control device is configured to carry out;

neutral control that controls the hydraulic pressure supplied to the clutch to a neutral control pressure for placing the clutch in a semi-engaged state while a vehicle stops; and

inertia control that carries out an inertia travelling by releasing the clutch while the vehicle travels, and

at the time that the inertia control is executed, the vehicle control device controls the hydraulic pressure supplied to the clutch to the same hydraulic pressure as the neutral control pressure.

2. The vehicle control device according to claim 1, wherein

the inertia control is control that carries out the inertia travelling by releasing the clutch and stopping the engine while the vehicle travels, and

at the time of return from the inertia control, the hydraulic pressure supplied to the clutch is controlled to the hydraulic pressure obtained by adding an increasing amount to the neutral control pressure during the period from the restart of the engine to a complete explosion of the engine and the clutch is engaged after the complete explosion of the engine.