Switching system for denatured methanol diesel fuel and general diesel fuel dual-fuel supplying

Abstract

The invention discloses a switching system for denatured methanol diesel fuel and general diesel fuel dual-fuel supplying. The switching system comprises a storage battery, and the storage battery, a methanol fuel tank, a denatured methanol diesel fuel pump, a low-pressure methanol nozzle and an engine are electrically connected in sequence. The engine is electrically connected with a rotation speed sensor, a diesel fuel tank, a water temperature sensor and an accelerator position sensor. The rotation speed sensor, the water temperature sensor and the accelerator position sensor are all electrically connected with an MCU control chip which is electrically connected with the storage battery, the denatured methanol diesel fuel pump and the low-pressure methanol nozzle. According to the switching system for denatured methanol diesel fuel and general diesel fuel dual-fuel supplying, when a signal of a denatured methanol diesel fuel level sensor displays that fuel in a denatured methanol diesel fuel tank is not enough, the MCU control chip automatically stops work of the denatured methanol diesel fuel pump, a pure diesel fuel mode is switched to, and all work is achieved through automatic operation of the MCU control chip, so that the problems of difficult cold starting, the unstable idle speed and the like of a dual-fuel diesel vehicle are solved.

Description

technical field [0001] The invention relates to the technical field of an oil supply system for a dual-fuel diesel vehicle, in particular to a switching system for dual-fuel oil supply of denatured methanol diesel and ordinary diesel. Background technique [0002] The shortage of diesel fuel provided by the current limited petroleum resources is increasing day by day, and many substitutes are emerging, among which denatured methanol diesel is obtained from coal chemical conversion, which has abundant sources and low price, and has the best prospect. However, because the oxygen content in methanol is far greater than that of diesel, and its physical and chemical technical indicators are also very different from diesel. When the denatured methanol diesel is used directly after denaturation, it is difficult to match the original car in cold start, idle speed, acceleration, etc. Chinese patent CN102953850A, US patent US2008184976, US2005193978, etc. all adopt the engine structur...

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Problems solved by technology

When the denatured methanol diesel is used directly after denaturation, it is difficult to match the original car in cold start, idle speed, acceleration, etc. Chinese patent CN102953850A, US patent US2008184976, US2005193978, etc. all adopt the engine structure of the original car to meet the requirements Requirements for use, the cost is high, the promotion is not easy, and it is difficult to realize the use on the existing tens of millions of diesel vehicles. For example, the patent ZL201320799485. A set of oil supply system, using pure diesel system at cold start or idling, switching to denatured methanol diesel system for fuel supply during normal operation, so as to match the original car, but this system needs to be switched manually and it is not easy to master the best switching timing

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