AMT (automated mechanical transmission) vehicle model CCS (cruise control system) based on hydrodynamic retarder as well as method
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A technology of hydraulic retarder and constant speed cruise, which is applied in the field of constant speed cruise control system, and can solve the problems that the fuel economy of the vehicle cannot be guaranteed, the working speed of the engine cannot be adjusted, and the speed of the vehicle can be reduced.
Active Publication Date: 2015-06-10
SINO TRUK JINAN POWER
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Problems solved by technology
The existing constant speed cruise control method is usually as follows: when the vehicle speed is lower than the set value, the speed is increased by controlling the engine to increase the fuel to increase the speed; and when the vehicle speed exceeds the set value, by reducing or even stopping fuel injection, And rely on the internal friction of the engine to slow down the engine, thereby reducing the speed of the vehicle, and the existing vehicles are usually non-AMT gearboxes, and the working speed of the engine cannot be adjusted by shifting gears, so the fuel economy of the vehicle cannot be guaranteed
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Embodiment 1
[0058] see figure 1 and figure 2 , the embodiment of the present invention provides a cruise control system for AMT vehicles based on hydraulic retarder, including: engine ECU, ABS, hydraulic retarder, AMT gearbox, instrument and body controller BCU, all The transmitter ECU, ABS, hydraulic retarder, AMT gearbox and instruments are all connected to the body controller BCU through the CAN bus;
[0059] Engine ECU: used to send the current engine power and real-time generated torque value and speed value to the body controller BCU, and respond to the speed or torque control command issued by the body controller BCU;
[0060] ABS: used to send real-time vehicle speed information to the body controller BCU;
[0061] Hydraulic retarder: used to send the current braking percentage to the body controller BCU and receive the required braking percentage sent by the body controller BCU;
[0062] AMT gearbox: used to send the current transmission gear, and control the transmission to ...
Embodiment 2
[0083] see figure 2 , the embodiment of the present invention provides a constant-speed cruise control method for an AMT vehicle based on a hydraulic retarder, and the control method is as follows:
[0084] (1) The instrument sends a constant speed cruise signal to the body controller BCU. After the vehicle enters the constant speed cruise state, the body controller BCU saves the set vehicle speed value and monitors the current vehicle speed value; the current vehicle speed value is sent to the vehicle in real time by the ABS. Body controller BCU;
[0085] (2) The vehicle body controller BCU compares the current vehicle speed value with the set vehicle speed value, if the current vehicle speed value is greater than the set vehicle speed value, then perform step (3), if the current vehicle speed value is less than the set vehicle speed value, then perform step ( 7), if the current vehicle speed value is equal to the set vehicle speed value, then execute step (6);
[0086] (3...
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Abstract
The invention discloses an AMT (automated mechanical transmission) vehicle model CCS (cruise control system) based on a hydrodynamic retarder as well as a method. The control system comprises an ECU (engine control unit), an ABS (anti-lock braking system), the hydrodynamic retarder, an AMT, a meter and a vehicle BCU (body control unit), wherein the ECU, the ABS, the hydrodynamic retarder, the AMT and the meter are connected with the vehicle BCU through a CAN (controller area network) bus. The AMT vehicle model CCS based on the hydrodynamic retarder has the benefits as follows: auxiliary braking equipment such as the hydrodynamic retarder, engine exhaust brake and the like is sufficiently utilized, the braking effect is better when the vehicle speed exceeds the cruise vehicle speed and speed reduction is required, that is, the safety guarantee is higher when a vehicle is driven particularly on a macroslope or a long slope; when the vehicle speed is lower than the cruise vehicle speed and acceleration is required, due to the fact that automatic gear shift is realized by AMT, the vehicle enables the engine to work in an economic rotating speed area under the premise of sufficient power, accordingly, the fuel economy of the whole vehicle is improved, the cruise control function is more reliable, and meanwhile, the fuel economy of the vehicle is improved.
Description
technical field [0001] The invention relates to the technical field of AMT vehicles, in particular to a constant-speed cruise control system and method for an AMT vehicle based on a hydraulic retarder. Background technique [0002] The cruise control function is a very important function for heavy commercial vehicles, and it is used more and more commonly. It can reduce the driver's work intensity and improve driving comfort. The existing constant speed cruise control method is usually as follows: when the vehicle speed is lower than the set value, the speed is increased by controlling the engine to increase the fuel to increase the speed; and when the vehicle speed exceeds the set value, by reducing or even stopping fuel injection, And rely on the internal friction of the engine to slow down the engine, thereby reducing the speed of the vehicle, and the existing vehicles are usually non-AMT gearboxes, and the working speed of the engine cannot be adjusted by shifting gea...
Claims
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Application Information
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