Integration-type gas controller of dual-purpose fuel tanker and gas jetting time correcting method

Abstract

The invention discloses a multi-functional integration-type gas controller of a dual-purpose fuel tanker, comprising a microprocessor, a gas jetting control system, an on-off state conversion control system, a pressure reducer solenoid valve, a fuel pump switching-off relay control system, an ignition advance angular signal control system, a fuel spray nozzle control system, a rotating speed signal sampling processing system, a crankshaft position sensor and a camshaft sensor. The invention also discloses a gas jetting time correcting method of the integration-type gas controller of the dual-purpose fuel tanker, comprising the following steps: starting the technological process; obtaining gasoline injection time Tr in a current working condition; checking a gasoline map to obtain theoretical injection time Tt of the current working condition; calculating a correction factor D; calculating a low-speed corrected value in the current working condition according to the change tendency of D; calculating corrected value of a gas-gasoline map; correcting gas injection time by using the corrected value of the gas-gasoline map; and finishing the technological process. In the invention, a timing advance processor (TAP) is calibrated in real time, the precision of a timing advance angle can be improved and the maximum efficacy of an engine is achieved.

Description

technical field [0001] The invention relates to a gas controller for a dual-purpose fuel vehicle, in particular to an integrated gas controller for a dual-purpose fuel vehicle and a gas injection time correction method. Background technique [0002] A dual-fuel vehicle refers to a vehicle whose engine can use both gasoline fuel and gas fuel, such as liquefied petroleum gas (LPG) or compressed natural gas (CNG), and the two fuels can be switched freely according to actual needs. The current dual-fuel vehicle mainly adopts the translation system principle, cooperates with the ignition advance angle regulator (TAP), and uses gas to drive the engine without changing the mechanical conditions of the original gasoline system engine. Since LPG is a by-product of industrial production, its price is relatively close to that of gasoline, and China's natural gas resources are abundant and the cost of exploitation is low. Therefore, more and more vehicles use natural gas as the fuel for...

AI Technical Summary

Problems solved by technology

[0004] 1. There are many electrical parts, the wiring harness layout is complicated, and the anti-interference ability is poor

[0005] 2. The ignition advance angle adjuster (TAP) needs the following signals: crankshaft position sensor signal (CPS); throttle position sensor signal (TPS); gas status (pressure reducer solenoid valve control) signal; these signals have gasoline system , there is also a gas system, the line direction and layout are complicated, and the TAP on the market is a product of a non-electrically shielded shell, which has very limited tolerance to electromagnetic compatibility (EMC). In the actual working environment, electromagnetic radiation often interferes with the TAP. The vehicle stalls after the CPS signal

[0006] 3. TAP cannot be calibrated, the angle setting is rough, and the vehicle dynamics and comfort are poor; the ignition timing angle strategy in the existing TAP is a simple, rough and unchangeable data, and it is impossible to use this TAP Applicable to all gasoline engines, it cannot exert the maximum performance of the engine, resulting in insufficient output torque and power of the engine, and poor power and comfort of the vehicle

The OBD diagnostic bus of the gasoline system is unavailable, and the gas system will gradually deviate from the normal working range

[0007] 4. For some models that do not have the OBD diagnostic bus or the OBD diagnostic bus is not available, the gas controller cannot read the fuel air-fuel ratio correction data from the gasoline controller. After working for a period of time, the gas system will gradually deviate from the normal working range. As a result, the air-fuel ratio of the mixture is too lean or too rich, and the engine has severe vibration, misfire, flameout and fault light alarms, etc.

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