Starting control method for idle stop-start vehicle

Abstract

This invention relates to a starting control method for an idle start-stop vehicle. The idle start-stop vehicle includes a battery system, a start-and-generate control system, an engine fuel injection control system, an engine with a crankshaft, and a key switch. The start-and-generate control system includes a start-and-generate controller and a start-and-generate device. The start-and-generate controller is electrically connected to the battery system, the start-and-generate device, and the key switch, and stores calculated information about a first angle of the crankshaft before the key switch is turned off. The engine fuel injection control system is communicatively connected to the start-and-generate controller. The start-and-generate device is coaxially mounted with the crankshaft. The engine fuel injection control system is electrically connected to the battery system and the engine. Therefore, through the starting control method of this invention for an idle start-stop vehicle, the engine fuel injection control system can effectively improve the accuracy of fuel injection control at the correct angle when the engine is about to start, enabling the engine to start faster and shortening the time it takes for the start-and-generate control system to start the engine.

Claims

1. A starting control method for an idle start-stop vehicle, the idle start-stop vehicle including a battery system, a start-and-generate control system, an engine fuel injection control system, an engine having a crankshaft, and a key switch, the start-and-generate control system including a start-and-generate controller and a start-and-generate device, the start-and-generate controller being electrically connected to the battery system, the start-and-generate device, and the key switch, and storing calculated information on a first angle of the crankshaft before the key switch is closed, the start-and-generate controller further calculating information on a second angle of the crankshaft before the idle start-stop vehicle is shut off at idle, the engine fuel injection control system being communicatively connected to the start-and-generate controller, the start-and-generate device being coaxially mounted with the crankshaft, and the engine fuel injection control system being electrically connected to the battery system and the engine; wherein... The starting control method for the idle start-stop vehicle includes the following steps: (A) Turning on the key switch and executing step (B); (B) The starter-generator controller reads the first angle information of the crankshaft and executes step (C); (C) The starter-generator controller transmits the first angle information of the crankshaft to the engine fuel injection control system and executes step (D); (D) Determining whether the starter-generator controller has received a starting signal, if yes, executing step (E), otherwise repeating step (D); (E) The engine fuel injection control system controls fuel injection ignition according to the first angle information of the crankshaft and executes step (F); (F) The engine starts and executes step (G); (G) Determining whether the idle start-stop vehicle is idle shut off, if yes, executing step (H), otherwise repeating step (G); (H) The starter-generator controller transmits the second angle information of the crankshaft to the engine fuel injection control system and executes step (I); (I) Determine whether the starter and generator controller has received the start signal. If yes, execute step (J). Otherwise, repeat step (I). (J) The engine fuel injection control system controls fuel injection ignition based on the second angle information of the crankshaft and executes step (K). (K) The engine starts.

2. The starting control method for an idle start-stop vehicle as described in claim 1, wherein, The battery system is either a lead-acid battery system or a lithium battery system.

3. The starting control method for an idle start-stop vehicle as described in claim 1, wherein, The battery system has a voltage of 12 volts or 48 volts.

4. The starting control method for an idle start-stop vehicle as described in claim 1, wherein, The starter and generator is a brushless motor that controls the crankshaft to rotate forward or backward so that the engine can rotate normally.

5. The starting control method for an idle start-stop vehicle as described in claim 1, wherein, The starter and generator controller communicates with the engine fuel injection control system via Controller Area Network (CANBUS), K-Line, or Input / Output Interface (I / O).

6. The starting control method for an idle start-stop vehicle as described in claim 1, wherein, The starter and generator controller has a memory and stores the first angle information of the crankshaft in the memory.

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