Why does the Torah refer to Yaakov's children as "Bnei Yisrael"?
Seforno: Because they had now become the nation of Yisrael, whose role it was to rule over 'angels and men.' 1
Why does it say "va'Yakam"?
Malbim: Now Yaakov went with intent to settle in Egypt.
Ha'amek Davar: Now that he knew that he is going to exile, it was hard for him to go. He needed to invigorate himself to go.
Above, it says "va'Yiten Lahem Yosef Agalos Al Pi Pharaoh," and "ha'Agalos Asher Shalach Yosef" (45:21, 27). Why does it say here "Asher Shalach Pharaoh"?
Moshav Zekenim: The wagons that Pharaoh sent were recognizable. The path from Egypt to Eretz Yisrael has mountains and hills, and is narrow. Regular wagons could not go there. Only Pharaoh had special wagons that could go there.
Ha'amek Davar (to 46:5, 45:21): Yosef told his brothers that Pharaoh compels Yaakov to come to Egypt at least for the duration of the famine, for he will not send grain, therefore he sent wagons. His brothers did not need to tell Yaakov, for he himself decided to go (45:28). After Hashem told Yaakov to descend until the time for redemption, they told Yaakov that Pharaoh sent the wagons, for he would not let Yosef send grain to him.
