Method for realizing accurate equipower torque characteristics

A torque characteristic and equal power technology, applied in the field of turbocharged diesel engines, can solve the problems of reducing diesel engine efficiency, reducing exhaust energy recovery, complex structure, etc., to expand the speed adaptability coefficient and expand torque adaptability coefficient, reducing the effect of shifting operations
CN102011646AInactive Publication Date: 2011-04-13BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for realizing accurate equipower torque characteristics. On the premise of ensuring that the maximum explosion pressure and the thermal load of a diesel engine are in an allowed range, the accurate equipower torque characteristic with the torque adaptive coefficient and the rotating speed adaptive coefficient of larger than 2.5 of the diesel engine is realized by adopting technical approaches of a Hyperbrid boosting system, various cycle modes of Miller cycle / symmetrical cycle, 2 / 4 stroke cycle and other cycle modes, a pressure and flow stepless adjustable air management system, and the like. The technical scheme of the invention can expand the rotating speed and torque adaptive coefficient of the diesel engine, especially rotating speed adaptive coefficient, ensure that the rotating speed adaptive coefficient is easier to meet the requirement of a vehicle, simplify a drive device, improve the compactness of the whole power drive device of the vehicle, reduce the gear shifting operation of the vehicle and improve the efficiency of the whole system.
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Description

technical field

[0001] The invention relates to the technical field of turbocharged diesel engines, in particular to a method for realizing quasi-equal power torque characteristics. Background technique

[0002] Generally, the torque adaptability coefficient of a highly enhanced supercharged diesel engine is less than 1.2, and the speed adaptability coefficient is less than 1.6. In order to adapt to different road conditions, the vehicle requires the maximum traction force to be more than 10 times the minimum traction force, and the maximum speed to be more than 10 times the minimum speed. Obviously, there is a large gap between the available torque and speed variation range of highly enhanced diesel engines and the vehicle demand, and a speed change device must be equipped to expand the variation range of the diesel engine's speed and effective torque, thereby reducing The volume power index of the power transmission system is increased, and the complexity of power transmi...

Claims

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