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Diesel-alternative fuel hybrid combustion engine control method

An alternative fuel and engine technology, applied in engine control, combustion engine, fuel injection control, etc., can solve problems such as difficult calibration, high cost of electronically controlled oil pump rack actuators, and unfavorable market promotion.

Active Publication Date: 2014-04-23
NANTONG YATAI ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, the installation of electronically controlled rack actuators has problems of consistency and changes in the blending ratio after mechanical wear, especially for the aftermarket (refitting commercial vehicles), and there is even more difficulty in calibration
At the same time, the cost of installing an electronically controlled oil pump rack actuator is also relatively high, which is not conducive to market promotion

Method used

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  • Diesel-alternative fuel hybrid combustion engine control method
  • Diesel-alternative fuel hybrid combustion engine control method

Examples

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, illustrate the implementation of the present invention with 6-cylinder diesel-natural gas dual-fuel engine system.

[0013] Install exhaust temperature sensor (3), wide-area oxygen sensor (4), blending ratio information display screen (5), natural gas injection controller, high-pressure diesel pump rack displacement sensor on the original mechanical high-pressure fuel pump diesel engine ( 7) The natural gas injector forms the basic diesel-natural gas dual-fuel engine system.

[0014] The high-pressure diesel pump rack is mechanically connected to the accelerator pedal of the vehicle. When the driver depresses the accelerator pedal, the engine is out of idle speed, and the oil pump rack is displaced to So, the natural gas injection controller drives the natural gas injector to inject natural gas into the intake pipe according to curve 10, and the engine output torque (vehicle speed) increases at this time. If the increase ...

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Abstract

The invention provides a diesel-alternative fuel hybrid combustion engine control method without an electric oil pump rack actuating mechanism, belonging to the field of engine control. According to the invention, an exhaust temperature sensor, a wide-range oxygen sensor, a mixedly burning ratio information display screen, an alternative fuel injection controller, a high pressure diesel pump rack displacement sensor and an alternative fuel injector are additionally arranged on an original diesel engine with a mechanical high pressure fuel pump; a high pressure diesel pump rack is mechanically connected with a vehicle accelerator pedal; and according to the position of the high pressure oil pump rack of the diesel engine, the alternative fuel injection controller determines the injection quantity of alternative fuel in combination with estimation on the excess air coefficient of an engine and the operation intention of the driver and sends a control command to drive an alternative fuel injection valve to inject corresponding alternative fuel to an engine intake pipe. The method has the beneficial effects of lowering the cost and overcoming the adverse factors caused by the adoption of an electric oil pump rack actuator and can be widely applied to the diesel-alternative fuel hybrid combustion engines.

Description

technical field [0001] The invention belongs to the field of engine control, and is especially suitable for the engine control of diesel-alternative fuel mixed combustion. Background technique [0002] In today's world of high fuel prices, people are constantly looking for ways to use alternative fuels in existing engines. Especially for high-power commercial diesel vehicles or construction machinery, the industry seeks to adopt the diesel-alternative fuel mixed combustion mode without changing the basic structure of the engine, and reduce the engine's demand for diesel by partially adding alternative fuels. Alternative fuels currently available include gas / liquid natural gas, alcohols, dimethyl ether, etc. [0003] In the existing technical solutions, for diesel engines with mechanically controlled high-pressure fuel pumps, an electronically controlled fuel pump rack actuator must be added to control the blending ratio of diesel and alternative fuels when converted to a du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30F02D19/06F02D41/14
CPCY02T10/47Y02T10/36Y02T10/30Y02T10/40
Inventor 张育华张欣王洪张金华
Owner NANTONG YATAI ENG TECH
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