Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

System and method for controlling a transmission

a transmission and system technology, applied in mechanical equipment, instruments, transportation and packaging, etc., can solve the problems of operator's jerk feeling of start motion, and achieve the effect of reducing the amount of jerk feeling, reducing the available torque, and reducing the gear ratio

Active Publication Date: 2014-10-16
TOYOTA JIDOSHA KK
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a smoother driving experience by using an advanced powertrain system for a vehicle. This system includes a transmission with a gear selection controller and an electronic control unit. The electronic control unit uses information from an information acquisition unit to determine if the vehicle is stationary or on an expressway. If the vehicle is stationary and on an expressway, the electronic control unit sends a signal to the gear selection controller to select a lower gear ratio for transitioning the vehicle from stationary to a moving state. This lower gear ratio reduces the amount of jerk felt by the driver, providing a smoother driving experience.

Problems solved by technology

These transmissions to date have suffered from a common problem in that when operating the vehicle in a congested freeway or highway traffic situation, for example in a traffic jam on an expressway, a jerky start motion can be experienced by the operator of the vehicle.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for controlling a transmission
  • System and method for controlling a transmission
  • System and method for controlling a transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011]The present invention includes a powertrain system for a vehicle 20. The powertrain system comprising a transmission 25 having a gear selection controller (not shown) adaptive to select one of a plurality of gear ratios capable of being produced by the transmission 25. The powertrain system further includes an electronic control unit 30 and at least one information acquisition unit. The electronic control unit 30 uses information from the information acquisition unit(s) to determine if the vehicle 20 is stationary and if the vehicle 20 is on an expressway or in a congested traffic situation. If the electronic control unit determines the vehicle is stationary and the vehicle is in a congested traffic situation or on an expressway then the electronic control unit 30 sends a signal to the gear selection controller of the transmission 25 to select a lower gear ratio that would normally be used to transition the vehicle from a stationary to a moving state.

[0012]Within the vehicle 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a smoother driving experience through the use of an advanced powertrain system for a vehicle. The powertrain system includes a transmission having a gear selection controller adapted to select one of a plurality of gear ratios, an electronic control unit, at least one information acquisition unit wherein the electronic control unit uses information from the information acquisition unit to determine if the vehicle is stationary and if the vehicle is on an expressway. If the electronic control unit determines the vehicle is stationary and the vehicle is on an expressway, then the electronic control unit sends a signal to the gear selection controller of the transmission to select a lower gear ratio that would normally be used to transition the vehicle from a stationary to a moving state.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a system and method for controlling a transmission in a vehicle. Specifically, the present invention relates to gear ratio selection for the transmission based on properties of specific factors determined by the system.BACKGROUND OF THE INVENTION[0002]Vehicles having an engine and a transmission with a plurality of gear ratios have been known in the art for quite some time. The transmission of the vehicle allows the engine to run at an appropriate RPM and provide various torques and speeds down to the powertrain to the wheels of the vehicle to provide forward motion of the vehicle.[0003]Also known is controlling the transmission having a plurality of gear ratios using various input criteria such as engine speed and requested acceleration from the driver, for example, through a driver input on an accelerator pedal.[0004]These transmissions to date have suffered from a common problem in that when operating the vehicle in a c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F16H61/02
CPCB60W30/18054B60W2510/1005F16H61/0204F16H61/0437B60W30/18027B60W2520/04B60W2710/1005F16H61/0213F16H2059/663F16H2059/666F16H2061/023Y10S903/945B60W2552/05B60W2556/50
Inventor LY, TAI J.
Owner TOYOTA JIDOSHA KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com