Abstract:
A control system/method for an at least partially automated transmission system (100) includes means to determine engine fueling required to cause a gross engine output torque (TEG (for zero flywheel torque)) resulting in zero flywheel torque (TFW=0). The engine (102) is caused to be fueled to the level required to cause zero flywheel torque at certain predetermined conditions, such as, for example, when disengaging a currently engaged ratio or during throttle recovery.
Abstract:
A control system/method for an at least partially automated transmission system (100) includes means to determine engine fueling required to cause a gross engine output torque (TEG (for zero flywheel torque)) resulting in zero flywheel torque (TFW=0). The engine (102) is caused to be fueled to the level required to cause zero flywheel torque at certain predetermined conditions, such as, for example, when disengaging a currently engaged ratio or during throttle recovery.
Abstract:
A semi-automatic shift implementation system (100) for a manually lever (57) shifted, splitter-type transmission (10). Lever shifts are semi-automatically implemented by automatic splitter shifting and, upon sensing transmission neutral, automatic control of engine fueling to cause substantially synchronous conditions for engagement of a target ratio.
Abstract:
A control system/method for an at least partially automated transmission system (100) includes means to determine engine fueling required to cause a gross engine output torque (TEG (for zero flywheel torque)) resulting in zero flywheel torque (TFW=0). The engine (102) is caused to be fueled to the level required to cause zero flywheel torque at certain predetermined conditions, such as, for example, when disengaging a currently engaged ratio or during throttle recovery.
Abstract:
A semi-automatic shift implementation system (100) for a lever-shifted mechanical transmission (10) includes an intent-to-shift sensor (122), such as an intent-to-shift button (120). Upon sensing an intent to shift, a controller (146) will cause the engine to be fueled to minimize torque-lock conditions at jaw clutches to be disengaged.
Abstract:
A vehicular powertrain system includes a prime mover having an output, a multi-ratio transmission having an input, and a torque reduction coupling system coupling the prime mover output and the multi-ratio transmission input. The exemplary torque reduction coupling system includes a clutch and a planetary gear set selectively coupling the prime mover output to the multi-ratio transmission input. The exemplary planetary gear set includes one components of the planetary gear set being selectively coupled to the clutch.
Abstract:
An integral gear life monitor system and method for determining gear use and damage is disclosed. The system includes a first and second sensors for measuring the rotational speed and torque of a driveline component, such as an input shaft of a vehicle transmission, for a particular gear ratio at one or more time intervals over a period of time. Each time interval may be in the range of 40 ms to 100 ms. The period of time may be hours, days, month, or even years. A processor performs a statistical summation technique to transform the signals from the first and second sensors into an equivalent amount time for the particular gear ratio during that period of time. A driveline vibration analyzer can perform an online determination of the torsional vibrations for the particular gear ratio to determine whether vibration is a root cause of why a gear ratio is worn or damaged. The transformed signals can be stored in a non-volatile memory of the processor for later retrieval as a diagnostic tool to statistically measure the amount of life used by each gear ratio, to determine if a gear ratio is worn or damaged, to determine the root cause of why a gear ratio is worn or damaged, and to take proactive and/or reactive measures to extend the life of the transmission.
Abstract:
A control for enhanced manual shifting in a computer-assisted (48) vehicular splitter-type compound transmission (16) having a synchronized main section (16A) shifted by a manually operated shift lever (31) and a controller (42). The splitter section (16E) is provided with a three-position (L, H, N) actuator (46) and is commanded to a splitter-neutral position upon sensing a main section shift to neutral to reduce the forces required to synchronize the main section.
Abstract:
A system/method of resetting the value of a control parameter (GCW.sub.CP indicative of vehicular gross combined weight and determined as a filtered/averaged value, to a predetermined default value, or to a test value, upon sensing vehicle operating conditions (OS=Oand t>REF) deemed indicative of a change in vehicle loading is provided. A vehicle automated system, such as an automated mechanical transmission system, is controlled as a function of the value of the control parameter.
Abstract:
A control system/method for an at least partially automated mechanical transmission system (10) is provided for determining if selected upshifts into a target gear ratio are feasible (208) or not feasible (210) under current vehicle operating conditions and for prohibiting the initiation of not feasible selected upshifts.