Control system for transmissions

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• and
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value, wherein the vehicle speed decreasing point where it is necessary to decrease the vehicle speed includes a corner.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point,
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value, and further comprising a transmission condition change device which shifts down a gear stage.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• and
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value, wherein the vehicle target speed is set to maintain good behavior of the vehicle, stability of the operation, and good drivability if the vehicle rounds a corner.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle seed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• and
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value, wherein the threshold value is set so the driver may not feel the deceleration.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value;
• and
• a distance detector which detects whether a distance from the present position to an immediate corner is less than a threshold value.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value;
• and
• a driver's intention detector which detects whether the driver intends to decrease the vehicle speed based on an operating condition of the vehicle by the driver.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value;
• a diverging point detector which detects whether a diverging point exists on the route;
• and
• a vehicle speed decreasing detection prohibit device which prohibits from detecting a vehicle speed decreasing point where it is necessary to decrease the vehicle speed.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that a vehicle follows, comprising:

• a vehicle speed decreasing point detector which detects a vehicle speed decreasing point on the route where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speed;
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value;
• and
• a target deceleration correction device which corrects the deceleration based on a slope of the road.

A control system for a transmission, which is controlled by a shift instruction based on a predetermined shift diagram and a route information detector which detects information on a route that vehicle follows,

• comprising:
• a vehicle speed decreasing point detector which detects a point where it is necessary to decrease vehicle speed;
• a vehicle target speed calculator which calculates a vehicle target speed for the vehicle speed decreasing point;
• a target deceleration calculator which calculates a decrease speed to the vehicle target speed;
• a vehicle deceleration calculator which calculates a deceleration to make a present vehicle speed be the target speedl;
• fiber channels coupling said host computers to said storage device
• a deceleration judgment device which decides whether said deceleration is larger than a threshold value;
• a transmission condition change device which changes a transmission condition to effect an engine braking condition when the deceleration judgment device decides that the deceleration is larger than the threshold value;
• and
• a target deceleration correction device which corrects the deceleration based on the braking condition.

A method for controlling a transmission, which controls the transmission by a shift instruction based on a predetermined shift diagram and route information for a route that a vehicle follows, comprising the steps of:

• detecting a vehicle speed decreasing point on the route where it is necessary to decrease the vehicle speed;
• calculating a vehicle target speed for the vehicle speed decreasing point;
• calculating a decrease speed to the vehicle target speed;
• calculating a deceleration to make the present vehicle speed be the target speed;
• determining whether said deceleration is larger than a threshold value;
• and
• changing the transmission condition effects an engine braking condition when the deceleration is larger than the threshold value.

A method for controlling a transmission, which controls the transmission by a shift instruction based on a predetermined shift diagram and route information for a route that a vehicle follows, comprising the steps of:

• detecting a vehicle speed decreasing point on the route where it is necessary to decrease the vehicle speed;
• calculating a vehicle target speed for the vehicle speed decreasing point;
• calculating a decrease speed to the vehicle target speed;
• calculating a deceleration to make the present vehicle speed be the target speed;
• determining whether said deceleration is larger than a threshold value;
• and
• changing the transmission condition effects an engine braking condition when the deceleration is larger than the threshold value
• detecting a corner on the route as a vehicle speed decreasing point where it is necessary to decrease the vehicle speed.

A method for controlling a transmission, which controls the transmission by a shift instruction based on a predetermined shift diagram and route information for a route that a vehicle follows, comprising the steps of:

• detecting vehicle speed decreasing point on the route where it is necessary to decrease the vehicle speed;
• calculating a vehicle target speed for the vehicle speed decreasing point;
• calculating a decrease speed to the vehicle target speed;
• calculating a deceleration to make the present vehicle speed be the target speed;
• determining whether said deceleration is larger than a threshold value;
• changing the transmission condition effects an engine braking condition when the deceleration is larger than the threshold value;
• and
• shifting down the gear stage.