Gear shift control for an automatic transmission of a vehicle

Patent · Tue Apr 29 04:00:00 EDT 1986

OSTI ID:5543193

Nagaoka, M; Oda, K

This patent describes an automatic transmission for vehicles. The automatic transmission consists of: a torque converter having an input member and an output member, a multiple stage transmission gear mechanism connected with the output member of the torque converter and having a plurality of gear stages, gear selecting means for selecting one of the gear stages in the transmission gear mechanism, vehicle operating condition detecting means for detecting vehicle operating conditions and producing vehicle operating condition signals, gear shift control means for operating the gear selecting means in accordance with the vehicle operating condition signals to thereby make the gear selecting means select one of the gear stages, the gear shift control means including first gear shift means having memories of first vehicle operating conditions wherein the gear selecting means is to be operated, second gear shift means having memories of second vehicle operating conditions wherein the gear selecting means is to be operated, traffic jam detecting means for detecting a traffic jam, and means for operating the gear selecting means under the first gear shift means when the traffic jam is not detected but under the second gear shift means when the traffic jam is detected so that a corresponding gear shift operation is carried out at a lower vehicle speed in a traffic jam than in an operating condition wherein the traffic jam is not detected, the traffic jam detecting means including memory means having memories of a traffic jam zone defined by a relationship between average vehicle speeds and acceleration rates corresponding to the average vehicle speeds.

• Assignee: Mazda Motor Corp., Hiroshima
• Patent Number(s): US 4584906
• OSTI ID: 5543193
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
ACCELERATION
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
EQUIPMENT
GEARS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MEMORY DEVICES
OPERATION
SIGNALS
SPEED REGULATORS
TIME MEASUREMENT
TORQUE
VEHICLES
VELOCITY